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1.

SCOPE OF WORKS ........................................................................................................ 6

2.

BRIEF SCOPE OF WORKS ............................................................................................. 7

3.

DETAILED SCOPE OF WORKS .................................................................................... 16 3.1

PACKAGE S-1.......................................................................................................... 18

3.1.1

220/132/11kV AL SHAHHANIYAH SUPER SUBSTATION ............................ 18

3.1.2

132/11kV AL SHAHHANIYAH SOUTH SUBSTATION ................................... 26

3.1.3

132/11kV LEBSAYYER SUBSTATION .......................................................... 30

3.1.4

220/66/11kV DOHA SUPER SUBSTATION (UPGRADE) .............................. 34

3.1.5

220/132/66/11kV AL WAAB SUPER SUBSTATION (UPGRADE) ................. 43

3.1.6

220/66/11kV ABU HAMOUR SUPER SUBSTATION (UPGRADE) ................ 50

3.1.7

400/220/132/66/11kV AL WAJBAH SUPER SUBSTATION (UPGRADE) ...... 55

3.2

PACKAGE S-2.......................................................................................................... 58

3.2.1

132/66/11kV UMM EBAIRIYA SUBSTATION ................................................. 58

3.2.2

66/11kV UMM AL AMAD-1 SUBSTATION ..................................................... 65

3.2.3

132/11kV UMM GARN SUBSTATION ............................................................ 69

3.2.4

66/11kV ABU THAILAH SUBSTATION (UPGRADE) ..................................... 76

3.3

PACKAGE S-3.......................................................................................................... 90

3.3.1

132/11kV AL JAHHANIYA 2 SUBSTATION ................................................... 90

3.3.2

132/11kV IZGHAWA NORTH SUBSTATION ................................................. 98

3.3.3

132/33/11kV MESAIEED INDUSTRIAL-A SUBSTATION ............................ 104

3.3.4

132/11kV WAKRAH 3 SUBSTATION ........................................................... 121

3.4

PACKAGE S-4........................................................................................................ 129

3.4.1

66/11kV NEW ASSIRI SUBSTATION (REPLACEMENT) ............................ 129

3.4.2

66/11kV SALWA ROAD SUBSTATION (REPLACEMENT) .......................... 134

3.4.3

66/11kV BIN MAHMOUD NORTH SUBSTATION ........................................ 140

3.4.4

66/11kV MUSHERIB SUBSTATION (REFURBISHMENT) ........................... 146

3.5

PACKAGE – S5 ...................................................................................................... 151

3.5.1

66/11kV MURRAH SOUTH SUBSTATION .................................................. 151

3.5.2

66/11kV UMM AL SENEEM 2 SUBSTATION ............................................... 157

3.5.3

66/11kV AL WAAB SUBSTATION (UPGRADE) ........................................... 164

3.5.4

66/11kV AL WAAB 2 SUBSTATION ............................................................. 175

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PACKAGE – S6 ...................................................................................................... 181

3.6.1

132/66/11kV MAITHER CENTRAL SUBSTATION (UPGRADE) .................. 181

3.6.2

66/11kV MUSEUM ROAD SUBSTATION (UPGRADE) ............................... 187

3.6.3

132/11kV AIN SINAN SUBSTATION ............................................................ 196

3.6.4

132/11kV JERYAN JENAIHAT 1 SUBSTATION .......................................... 202

3.7

PACKAGE – S7 ...................................................................................................... 210

3.7.1

66/11kV NEW DOHA E SUBSTATION (REPLACEMENT) .......................... 210

3.7.2

66/11kV SALATA SUBSTATION (REPLACEMENT) .................................... 218

3.8

PACKAGE – S8 ...................................................................................................... 226

3.8.1

132/11kV MASHAF 1 SUBSTATION ............................................................ 226

3.8.2

132/11kV MASHAF 2 SUBSTATION ............................................................ 230

3.8.3

132/11kV MASHAF 3 SUBSTATION ............................................................ 234

3.8.4

132/11kV AL WUKAIR 10 SUBSTATION ..................................................... 239

3.9

PACKAGE – S9 ...................................................................................................... 245

3.9.1

132/11kV AL WUKAIR 9 SUBSTATION ....................................................... 245

3.9.2

132/11kV AL WUKAIR 8 SUBSTATION ....................................................... 250

3.9.3

132/11kV AL WUKAIR 7 SUBSTATION ....................................................... 255

3.9.4

132/11kV AL WUKAIR 6 SUBSTATION ....................................................... 259

3.10

PACKAGE – S10 ................................................................................................ 265

3.10.1

132/11kV AL WUKAIR 5 SUBSTATION ....................................................... 265

3.10.2

132/11kV AL WUKAIR 4 SUBSTATION ....................................................... 269

3.10.3

132/11kV AL WUKAIR 3 SUBSTATION ....................................................... 274

3.10.4

132/11kV AL WUKAIR 2 SUBSTATION ....................................................... 278

3.11

PACKAGE – S11 ................................................................................................ 284

3.11.1

66/11kV ABU HAMOUR WEST S/S ............................................................. 284

3.11.2

66/11kV RAWDAT AL KHAIL 2 S/S.............................................................. 289

3.11.3

66/11kV LUAIB S/S ...................................................................................... 293

3.11.4

33/11kV ABU SAMRA SUBSTATION (UPGRADE)...................................... 298

3.12

PACKAGE S-12 .................................................................................................. 304

3.12.1

220/132/11kV FRAMEWORK SUBSTATION ............................................... 304

3.12.2

220/66/11kV FRAMEWORK SUBSTATION ................................................. 308

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REMOTE END WORKS – TYPICAL ............................................................ 313

PACKAGE S-13 .................................................................................................. 320

3.13.1

132/11kV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11kV SWG) – 2 Nos ............................................................................................................... 320

3.13.2

132/11kV FRAMEWORK TYPE B SUBSTATION (Single 11kV SWG) – 2 Nos . ...................................................................................................................... 323

3.13.3

132/11kV FRAMEWORK TYPE C SUBSTATION (Single 11kV SWG) ........ 326

3.13.4

REMOTE END WORKS – TYPICAL ............................................................ 330

3.14

PACKAGE S-14 .................................................................................................. 336

3.14.1

132/11kV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11kV SWG) – 2 Nos ............................................................................................................... 336

3.14.2

132/11kV FRAMEWORK TYPE B SUBSTATION (Single 11kV SWG) – 2 Nos . ...................................................................................................................... 339

3.14.3

132/11kV FRAMEWORK TYPE C SUBSTATION (Single 11kV SWG) ........ 342

3.14.4

REMOTE END WORKS – TYPICAL ............................................................ 346

3.15

PACKAGE – S15 ................................................................................................ 351

3.15.1

66/11kV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11kV SWG) – 2 Nos ............................................................................................................... 351

3.15.2

66/11kV FRAMEWORK TYPE B SUBSTATION (SINGLE 11kV SWG) – 2 Nos ...................................................................................................................... 355

3.15.3

66/11kV FRAMEWORK TYPE C SUBSTATION (SINGLE 11kV SWG) ....... 358

3.15.4

REMOTE END WORKS – TYPICAL ............................................................ 361

3.16

PACKAGE – S16 ................................................................................................ 367

3.16.1

66/11kV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11kV SWG) – 2 Nos ............................................................................................................... 367

3.16.2

66/11kV FRAMEWORK TYPE B SUBSTATION (SINGLE 11kV SWG) – 2 Nos ...................................................................................................................... 370

3.16.3

66/11kV FRAMEWORK TYPE C SUBSTATION (SINGLE 11kV SWG) ....... 374

3.16.4

REMOTE END WORKS – TYPICAL ............................................................ 377

3.17

PACKAGE – S17 ................................................................................................ 382

3.17.1

66/11kV FRAMEWORK TYPE A SUBSTATION (CONVENTIONAL, DOUBLE 11kV SWG – CIVIL WORKS DONE BY DEVELOPER) ............................... 382

3.17.2

66/11kV FRAMEWORK TYPE B SUBSTATION (CONVENTIONAL, SINGLE 11kV SWG - CIVIL WORKS DONE BY DEVELOPER) ................................ 386

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66/11kV FRAMEWORK UNDERGROUND TYPE A SUBSTATION (DOUBLE 11kV SWG – CIVIL WORKS DONE BY DEVELOPER) ............................... 390

3.17.4

66/11kV FRAMEWORK UNDERGROUND TYPE B SUBSTATION (SINGLE 11kV SWG - CIVIL WORKS DONE BY DEVELOPER) ................................ 394

3.17.5

66/11kV FRAMEWORK UNDERGROUND TYPE A SUBSTATION (DOUBLE 11kV SWG)................................................................................................... 398

3.17.6

66/11kV FRAMEWORK UNDERGROUND TYPE B SUBSTATION (SINGLE 11kV SWG)................................................................................................... 401

3.17.7

REMOTE END WORKS – TYPICAL ............................................................ 405

3.18

PACKAGE S-18 TELECOMMUNICATION SYSTEM .......................................... 410

3.18.1

INTRODUCTION .......................................................................................... 410

3.18.2

SCOPE OF WORKS FOR SUBSTATIONS PACKAGE................................ 411

3.18.3

SCOPE OF WORKS FOR FRAMEWORK CABLES / SUBSTATIONS ........ 427

3.18.4

OPTIONAL SCOPE OF WORK .................................................................... 434

3.19

PACKAGE – S19 ................................................................................................ 434

3.19.1

INSTALLATION OF CAPACITOR BANKS ................................................... 434

4.

NOTES TO BIDDERS .................................................................................................. 443

5.

NOTES APPLICABLE FOR FRAMEWORK PACKAGES ............................................ 451

6.

IMPORTANT NOTES APPLICABLE FOR ALL PACKAGES........................................ 454

7.

EXTENT OF SUBSTATION CONTRACT ..................................................................... 455

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1. SCOPE OF WORKS Description of works Kahramaa intends to expand the existing Power transmission network under the project entitled “Qatar Power Transmission System Expansion – Phase 13 - Substations” to meet with the increased Power demand due to the developmental works in the State of Qatar. Details of the complete project are summarized in the Section 2 below. The following tenders are issued at the same time, and the contractor should be also aware of the influence of the works covered by the other Tenders: GTC 735/2015 – Substations (This tender); GTC 736/2015 – Cables The works of the Project are spread all over the State of Qatar including both newly and already developed areas. The details which are available at the time of preparation of this Tender Documents are shown on the Location maps enclosed. The exact coordinates and ground elevation shall be coordinated with the concerned Authorities during the project execution stage.

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2. BRIEF SCOPE OF WORKS PACKAGE S-1 (Works on 220kV and associated S/Ss) 220/132/11kV Al Shahhaniyah Super: New Transmission Substation incorporating 220kV GIS, 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 220/132kV, 315MVA and 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, 2 x 220kV, 60MVAR Shunt Reactors and other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Shahhaniyah South: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Lebsayyer: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 220/66/11kV Doha Super (Upgrade): Existing 220/66/11kV Transformer Feeder Substation (built under Phase 8 Project) shall be expanded by addition of new 220kV GIS, 1 x 220/66kV, 200MVA Power Transformer and other associated equipment and works as required and indicated elsewhere in the Tender document. 220/132/66/11kV Al Waab Super (Upgrade): Existing 220/132/66/11kV Transformer Feeder Substation (built under Phase 7 Project) shall be expanded by addition of new 220kV GIS, 1 x 220/132kV, 315MVA Power Transformer and other associated equipment and works as required and indicated elsewhere in the Tender document. 220/66/11kV Abu Hamour Super (Upgrade): Existing 220/66/11kV GIS substation (built under Phase 10 Project by Hyosung) shall be extended by adding new 1 x 220/66kV, 200MVA Power Transformer and other associated equipment and works as required and indicated elsewhere in the Tender document. 400/220/132/66/11kV Al Wajbah Super (Upgrade): Existing 400/220/132/66/11kV GIS substation (built under Phase 7 Project) shall be expanded by addition of new 2 x 220kV GIS bays and other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-2 (WORKS RELATED to AL SHAKHAMA AREA) 132/66/11kV Umm Ebairiya: New Transmission Substation incorporating 132kV GIS, 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/66kV, 160MVA and 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers and other associated equipment and works as required and indicated elsewhere in the Tender document.

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66/11kV Umm Al Amad - 1: New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Umm Garn: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 2 x 132kV, 15MVAr Shunt Reactors, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Abu Thailah (Upgrade): Existing 66/11kV substation (built under Phase 7 Project) shall be expanded by addition of new 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers and other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-3 (NEW 132KV S/S) 132/11kV Al Jahhaniya 2: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Izghawa North: New Transmission Substation incorporating 132kV GIS, 2 x 11kV metal enclosed switchgears (GIS/AIS), 4 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Mesaieed Industrial-A: Existing 132/33/11kV substation shall be completely refurbished with the new equipment incorporating 132kV GIS, 33kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/33kV, 100MVA and 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Wakrah 3: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-4 (REFURBISHMENT/REPLACEMENT OF THE EXISTING S/S and NEW 66KV S/S) 66/11kV New Assiri (Replacement): Existing 66/11kV substation shall be completely replaced with the New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document.

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66/11kV Salwa Road (Replacement): Existing 66/11kV substation shall be completely replaced with the New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Bin Mahmoud North: New 66/11kV Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Musherib (Refurbishment): Existing 66/11kV substation shall be completely refurbished with the new equipment incorporating 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-5 (UPGRADE OF THE EXISTING S/S and NEW 66kV S/S) 66/11kV Murrah South: New 66/11kV Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Umm Al Seneem 2 New 66/11kV Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Al Waab (Upgrade): Existing 66/11kV transformer feeder substation (built under Phase 6 Project by M/s Siemens) shall be expanded by addition of new 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers and other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Al Waab 2: New 66/11kV Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-6 (UPGRADE OF THE EXISTING S/S and NEW 132kV S/S) 132/66/11kV Maither Central (Upgrade): Existing 132/66/11kV transformer feeder substation (built under Phase 5 Project) shall be expanded by extension of the existing 66kV GIS, addition of new 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers and other associated equipment and works as required and indicated elsewhere in the Tender document.

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66/11kV Museum Road (Upgrade): Existing 66/11kV substation (built under Phase 6 Project by M/s ABB) shall be expanded by extension of the existing 66kV GIS, addition of new 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers and other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Ain Sinan: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Jeryan Jenaihat-1: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-7 (REPLACEMENT OF THE EXISTING 66KV S/S) 66/11kV New Doha E (Replacement): Existing 66/11kV substation shall be completely replaced with the New Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Salata (Replacement): Existing 66/11kV substation shall be completely replaced with the New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-8 (NEW 132KV S/S at Wukair/Mashaf area) 132/11kV Mashaf 1: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Mashaf 2: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Mashaf 3: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document.

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132/11kV Al Wukair 10: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-9 (NEW 132KV S/S at Wukair area) 132/11kV Al Wukair 9: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Wukair 8: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Wukair 7: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Wukair 6: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-10 (NEW 132KV S/S at Wukair area) 132/11kV Al Wukair 5: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Wukair 4: New Transmission Substation incorporating 132kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Wukair 3: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 132/11kV Al Wukair 2: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. GTC-735 SCOPE OF WORKS R0

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PACKAGE S-11 (NEW 66KV S/S) 66/11kV Abu Hamour West: New 66/11kV Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Rawdat al Khail 2: New 66/11kV transformer feeder Substation incorporating 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 66/11kV Luaib: New 66/11kV Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 33/11kV Abu Samra (Upgrade): Existing 33/11kV transformer feeder substation (built under earlier Kahramaa Projects) shall be expanded by addition of new 33kV GIS, 11/0.415kV auxiliary transformers and other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-12 (NEW 220KV FRAMEWORK S/S) 220/132/11kV Framework Substation: New Transmission Substation incorporating 220kV GIS, 132kV GIS, 11kV metal enclosed switchgears (GIS/AIS), 3 x 220/132kV, 315MVA and 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Service Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. 220/66/11kV Framework Substation: New Transmission Substation incorporating 220kV GIS, 66kV GIS, 11kV metal enclosed switchgears (GIS/AIS), 2 x 220/66kV, 200MVA and 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Service Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-13 (NEW 132KV FRAMEWORK S/S) Two Nos. of 132/11kV Framework Substation Type A: New Transmission Substation incorporating 132kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Two Nos. of 132/11kV Framework Substation Type B: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document.

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One No. of 132/11kV Framework Substation Type C: New Transmission Substation incorporating 132kV GIS with Single busbar, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-14 (NEW 132KV FRAMEWORK S/S) Two Nos. of 132/11kV Framework Substation Type A: New Transmission Substation incorporating 132kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Two Nos. of 132/11kV Framework Substation Type B: New Transmission Substation incorporating 132kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. One No. of 132/11kV Framework Substation Type C: New Transmission Substation incorporating 132kV GIS with Single busbar, 11kV metal enclosed switchgear (GIS/AIS), 2 x 132/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-15 (NEW 66KV FRAMEWORK S/S) Two Nos. of 66/11kV Framework Substation Type A: New Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Two Nos. of 66/11kV Framework Substation Type B: New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. One No. of 66/11kV Framework Substation Type C: New Transmission Substation incorporating 66kV GIS with Single busbar, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-16 (NEW 66KV FRAMEWORK S/S) Two Nos. of 66/11kV Framework Substation Type A: New Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document.

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Two Nos. of 66/11kV Framework Substation Type B: New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. One No. of 66/11kV Framework Substation Type C: New Transmission Substation incorporating 66kV GIS with Single busbar, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-17 (NEW 66KV FRAMEWORK S/S without civil works or underground) One No. of 66/11kV Framework Substation: New Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Civil works shall be done by others. One No. of 66/11kV Framework Substation: New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Civil works shall be done by others. One No. of 66/11kV Underground Framework Substation: New Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Civil works shall be done by others. One No. of 66/11kV Underground Framework Substation: New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. Civil works shall be done by others. One No. of 66/11kV Underground Framework Substation: New Transmission Substation incorporating 66kV GIS, 2 x 11kV metal enclosed switchgear (GIS/AIS), 4 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. One No. of 66/11kV Underground Framework Substation: New Transmission Substation incorporating 66kV GIS, 11kV metal enclosed switchgear (GIS/AIS), 2 x 66/11kV, 40MVA Power Transformers, 11/0.415kV Auxiliary Transformers, other associated equipment and works as required and indicated elsewhere in the Tender document. PACKAGE S-18 TELECOMMUNICATION Telecommunication System: New telecommunication equipment shall be provided for connection of new and refurbished substations to Kahramaa Telecommunication System including all works necessary to connect these substations to NCC/ENCC/DCC and to keep existing GTC-735 SCOPE OF WORKS R0

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connections of existing substations being modified, replaced or upgraded under the scope of this Tender - as per Detailed Technical Specification in Volume 3. PACKAGE S-19 INSTALLATION OF CAPACITOR BANKS New Capacitor banks installation at the existing 11kV switchgear of several primary substations.

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3. DETAILED SCOPE OF WORKS BIDDER shall note that: Remote end modifications: The Scope of Works identifies remote end substations and type of circuit, e.g. OHL/ cable, involved as connecting link between the two substations. If the remote end substations are existing substations, the scope of substation Contractor includes all modifications in Protection, Station Control System, etc., related to the Contractor’s main Scope of Works, precommissioning checks, end to end tests and all commissioning activities as appropriate at the remote end stations as well. EHV and HV Cables: It is general approach that all EHV and HV cables for connections within substations and between SWG and OHL terminal gantry / cable compound are in the substation Contractor Scope of Works. The scope of substation Contractor also includes required coordination with the Contractor(s) of other end substation(s), underground Power cable Contractors and OHL Contractors, for pre-commissioning checks, end to end tests and all commissioning activities as appropriate. Each Contractor shall be responsible for the works (including his share of interface points) as per the Scope of the Works. In the case of dispute, if any, Kahramaa’s decision in this regard shall be final and binding to all concerned parties. The following is under the Scope of work for substation Contractor when it is required to dismantle oil filled cable to install new XLPE cable: • Excavation, backfilling and all other related civil work • Removing oil tank • Disconnect Gauge/manometer panels and control/alarm cables • Cut and cap existing oil filled cables after draining the oil from cables. • Remove the existing terminations • Delivery of dismantled material to Kahramaa store Dismantling works: Where substation Contractor Scope of the Works includes replacement of existing substation, dismantling works of the existing facilities, generally, are not included in the Scope of substation Contractor unless specified otherwise. However, site clearance of the area dedicated / required for the substation Contractor Scope, including existing structures, if any, is obligation of substation Contractor. Future development: In the detailed scope of works below, planned future development for each substation is clearly specified. Bidder should note all requirements for spare bays, space for future bays, future Transformers, capacitor banks, etc. Those should be considered during the tendering and later in design stage in order to allocate sufficient space, to properly plan and size cable corridors / ducts, common services such as uninterrupted Power supply, HVAC and other related facilities. Pricing for civil works: Volume 7 of this Tender document includes site plot layout drawings and GTC-735 SCOPE OF WORKS R0

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general arrangement drawings for the substation buildings. Commercial offer shall be based on the subject drawings, considering specified minimum clearances and operation distance requirements specified in Section 6.3 of this document and related specification, considering actual Scope of Works and offered equipment. Bidder is obliged to ensure that buildings are properly sized and to provide relevant layout drawings within the Technical offer. Accordingly, no price variations will be allowed for change of the building size in the later stage of Contract. Part of civil works such as perimeter wall/fence, access road and filling works will be measured and paid as “per actual” quantities. Remote end modifications: Specifications enclosed with the Contract shall be applicable for all modification works at remote end substations constructed under all earlier Kahramaa projects and which will be connected to substations, subject of this Contract. Therefore protection relays (Main relays, Trip relays and TCS relays) need to be changed if required under new scheme. Also replacement of CTs is anticipated, and for this work separate unit price shall be provided. However for detailed scope please refer under remote end modification works for the concerned remote end substations. It shall be noted that many of the substations considered as “Remote End Substations” are currently under construction and all the equipment/systems will be under warranty for a period of 2 years from its date of Taking Over. Hence, in case the equipment/system is still under warranty during modification under the scope of this project, the Contractor shall execute the works in such a way as not to dilute or nullify existing warranties in any way, whatsoever. All details of work such as, method statements, interface requirements, intended subcontractors, etc. shall be discussed and agreed with Kahramaa well in advance of the scheduled commencement date of such works and full clarity shall be established. The same is applicable for modification on the cable lines which are part of this Contract. Connection to NCC/ENCC/DCC: All modification works at Kahramaa control centers NCC/ENCC/DCC to include new and modified / upgraded / refurbished existing substations will be covered under a separate Contract. The scope of substation Contractor under this project includes all interfacing works with the above Contractor, necessary to include new substations and modifications to existing substations into the NCC, ENCC and DCC, including interoperability and end-to-end testing. This includes co-ordination works with above Contractor during all stages until commissioning and end to end test.

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PACKAGE S-1

3.1

3.1.1

220/132/11KV AL SHAHHANIYAH SUPER SUBSTATION 220/132/11kV Al Shahhaniyah Super substation is intended to cater Power supply to the new growing demands in Al Shahhaniyah and the surrounding areas. Al Shahhaniyah Super S/S will be connected to network by 220kV double cable circuits from Umm Al Amad Super substation. The cables will be installed under separate Contract (GTC/736/2015, Package C2). The principal elements of new 220/132/11kV Al Shahhaniyah Super substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 220kV, 4000A at 40˚C, 50kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 220/132kV Transformers suitable for cable connection as per the approved connection arrangement; - Two (2) Nos. Shunt Reactor bays suitable for cable connection as per the approved connection arrangement; - Six (6) Nos. cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. incoming Transformer bays for 220/132kV Transformers suitable for GIB connection as per the approved connection arrangement; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Eight (8) Nos. Cable feeder bays (four (4) Nos. spare); - Two (2) Nos. 132kV, 315MVA bus duct between 220/132kV Power Transformers and 132kV GIS; - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

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- One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future Capacitor bank; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers (Auto) 220/132kV, 189/236/315MVA, YNa0(d1) ONAN/ONAF/OFAF cooling, ±10% on load taps in steps of 1.25%, 13.6% impedance on ONAN (189 MVA), provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. 220kV, 60MVAr Shunt Reactors with terminal CTs, neutral CTs etc.

•

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 2000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 6% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to UAAS substation. The new relays to be installed at 220/132/11kV Al Shahhaniyah Super substation shall match the protection at UAAS substation end.

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•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - Partial discharge online monitoring system for 220kV GIS; - Online condition monitoring system for new 220/132kV, 315MVA Transformers; - Online condition monitoring system for new 220kV, 60MVAr Shunt Reactors; - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.

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- Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.
LV Power Cables, Control Cables with all accessories
Earthing & Lightning Protection
Small Power & Lighting
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 220/132/11kV substation including building services. Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities.
220kV and 132kV GIS and Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers, Shunt Reactors & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Fire hydrant and ring main piping (all around the substation buildings perimeter).

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers & Shunt Reactors. All Transformers & Shunt Reactors shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Shunt Reactors, Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

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•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

220kV, 1x1600mm2, XLPE, 315MVA, double circuit, single point earthed with earth continuity conductor cable links between 220kV GIS and 220/132kV Transformers, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

220kV, 1x500mm2, XLPE, 60MVA, double circuit, solid bonded cable links between 220kV GIS and 220kV Shunt Reactors, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

132kV, 1x2000mm2, XLPE, 315MVA, double circuit, single point earthed with earth continuity conductor cable links between 132kV GIS and 220/132kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 100m. (alternative to 132kV GI bus duct in case of layout difficulty)

•

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 2000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat

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shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.
REMOTE END WORKS AT UAAS S/S 400/220/66/11kV Umm Al Amad Super is an existing substation with 400kV GIS, 220kV GIS, 66kV GIS and 11kV Switchgear built by Alstom under Phase 8 Project. UAAS will be connected to Al Shahhaniyah Super by the new 220kV Double Circuit cable connection. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at UAAS shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Alstom under Phase 8 project to include changes to 2x220kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x220kV existing bays to be connected to Al Shahhaniyah Super substation are with Protection Relays/Equipments under GTC/144A/2006 Phase-8 project. •

The relay provided at UAAS for Main-1 protection is Alstom make P545 and for Main-2 Protection is Siemens make 7SD5. The new Relays/Equipment to be installed at Al Shahhaniyah Super substation should match the protection at 220kV UAAS Substation end (supplied under Phase-8 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

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•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT AL THUMAMAH SUPER S/S 220/132/11kV Al Thumamah Super is a new substation with 220kV GIS, 132kV GIS and 11kV Switchgear, being constructed by Siemens under Phase 11 Project. This substation will be under warranty period. Al Thumamah Super S/S shall be connected to Old Airport S/S by new 1x132kV cable circuit. The cables will be installed under separate Contract (GTC/736/2015, Package C3). All necessary modifications, End to End test, testing and commissioning and putting into service of the new circuit shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and re-commissioning of two number of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control •

Required Modifications to SCS supplied by Siemens under Phase 11 project to include changes to 1x132kV cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Protection •

1x132kV existing bay to be connected to Old Airport substations is supplied with protection relays/equipment under GTC/488C/2012 Phase-11 project.

•

The relays provided at Al Thumamah Super for Main-1 protection is Siemens make 7SD5 and for Main-2 protection is Alstom make P545. The new relays/equipment to be installed at Old Airport substation should match the protection at 132kV Al Thumamah Super substation end (supplied under Phase-11 project).

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•

Retesting of the relays/equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT OLD AIRPORT S/S 132/11kV Old Airport is an existing substation with 132kV GIS and 11kV Switchgear, being refurbished by L&T under Phase 11 Project. This substation will be under warranty period. Al Thumamah Super S/S shall be connected to Old Airport S/S by new 1x132kV cable circuit. The cables will be installed under separate Contract (GTC/736/2015, Package C3). All necessary modifications, End to End test, testing and commissioning and putting into service of the new circuit shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and re-commissioning of one number of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control •

Required Modifications to SCS of ABB make supplied by L&T under Phase 11 project to include changes to 1x132kV cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Protection •

1x132kV existing bay to be connected to Al Thumamah Super substation is supplied with protection relays/equipment under GTC/488C/2012 Phase-11 project.

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•

The relays provided at Al Old Airport for Main-1 protection is ABB make RED670 and for Main-2 protection is Siemens make 7SD522. Relays shall match protection at Al Thumamah Super.

•

Retesting of the relays/equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

132/11KV AL SHAHHANIYAH SOUTH SUBSTATION 132/11kV Al Shahhaniyah South substation is intended to cater Power supply to the new growing demands in Al Shahhaniyah area. Al Shahhaniyah South S/S will be connected to network by 132kV double cable circuits from Al Shahhaniyah Super substation under the separate Contract (GTC/736/2015, Package C3). The principal elements of new 132/11kV Al Shahhaniyah South substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz double bas bar GIS consisting of following bays: - Two (2) Bus section bays; - Two (2) Bus coupler bays; - Two (2) 40MVA outgoing Transformer feeder bays for 132/11kV Transformers; - Six (6) cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on either side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Bays for outgoing feeders rated 630A;

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- Two (2) Nos. Bays for future capacitor banks feeders; - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on either side of the switchgear; Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV incomer bays and each of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each Switchgear, i.e., for a two Switchgear Substation (A & B) there shall be two load shedding panels.

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SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Earthing & Lightning Protection
Small Power & Lighting
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services.
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision

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of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future). •

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Remote End S/S Works: Al Shahhaniya Super S/S GTC-735 SCOPE OF WORKS R0

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The remote end substation, Al Shahhaniya Super, is also to be built under the same package and will be connected to the new Shahhaniya South S/S with 2x132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C3). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.1.3

132/11KV LEBSAYYER SUBSTATION 132/11kV Lebsayyer substation is intended to cater Power supply to the new growing demands in surrounding area. Lebsayyer S/S will be connected to network by 2x132kV cable circuits from Al Shahhaniyah Super substation. The cables will be installed under separate Contract (GTC/736/2015, Package C3). The principal elements of new 132/11kV Lebsayyer substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz double bas bar GIS consisting of following bays: - Two (2) Bus section bays; - Two (2) Bus coupler bays; - Two (2) 40MVA outgoing Transformer feeder bays for 132/11kV Transformers; - Six (6) cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on either side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Bays for outgoing feeders rated 630A; - Two (2) Nos. Bays for future capacitor banks feeders; - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on either side of the switchgear; Alternatively 11kV GIS is also acceptable.


Power Transformers, NER’s

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•

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System

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•

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Earthing & Lightning Protection
Small Power & Lighting
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services. Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities.
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

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•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Remote End S/S Works: at Al Shahaniya Super S/S The remote end substation, Al Shahhaniya Super, is also to be built under the same package and will be connected to the new Lebsayyer S/S with 2x132kV cable circuits. The GTC-735 SCOPE OF WORKS R0

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cables will be installed under separate contract (GTC/736/2015, Package C3). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.1.4

220/66/11KV DOHA SUPER SUBSTATION (UPGRADE) 220/66/11kV Doha Super is the existing substation built by M/s Alstom under Phase 8 project (GTC 144A/2006). Existing transformer feeder substation shall be upgraded by addition of 220kV GIS and one new 220/66kV, 200MVA transformer. Doha Super substation shall remain connected to Airport Super S/S by diverting the existing 2x220kV cables, currently connected at 220/66kV transformer to the new 220kV GIS. Installation of the new equipment as well as diversion of the existing 2x220kV cables are in the scope of this project. In addition, Doha Super will be connected to Naeeja Super substation by 1x220kV, 515MVA circuit. The cables will installed under separate Contract (GTC/736/2015, Package C2). The principal elements for the upgrade of the 220/66/11kV Doha Super substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 220kV, 4000A at 40˚C, 50kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Three (3) Nos. outgoing Transformer bays for 220/66kV Transformers suitable for cable connection as per the approved connection arrangement; - Six (6) Nos. cable feeder bays (three (3) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Existing 66kV GIS: - Addition of 1x 66kV, 2500A, 200MVA incoming Transformer Feeder Bay with twin cable head for connecting two runs of 2000 sq.mm 66kV cables. All civil works required for the new bays to be considered. - Re-testing and Re-commissioning of 66kV Transformer LV B18 & B28 bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete recommissioning of the above switchgear bays.

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Power Transformers •

An additional 220/66kV Power Transformer 120/150/200MVA, YNyn0(d1), ONAN/ONAF/OFAF cooling, +10% -10% on load taps in steps of 1.25%, impedance as the existing Transformers on ONAN provided with AVR, terminal CTs, neutral CTs etc. Existing Transformers are having 20.76% impedance at OFAF. Matching of Percentage impedance of new Transformer with the existing Transformers shall be ensured by Contractor based on the site survey and Factory acceptance test reports of the existing Transformers. Electrical parameters of the new transformer shall be identical to the existing Transformers to meet the conditions of parallel operation of all three units LV cable boxes of the new transformer shall have suitable arrangement to enable termination of two runs (two cables per phase) of 66kV, 2000 sq.mm cables from the new bay in the existing 66kV GIS.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with the existing equipment and with remote ends (in line with remote end protection scope) shall be provided for the new feeders. However, the following specific requirements shall be considered:

•

For 2x220kV Cable Feeders to be connected to Airport Super substation and 1x220kV Cable Feeders to be connected to Naeeja Super substation, new relays and equipment shall be installed at Doha Super substation. End to End test, Testing and commissioning and putting into service of these three circuits shall be substation Contractor's responsibility.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 220kV control room to complete the necessary connection and end-to-end test of protection for the said links (New control room in Doha Super to Airport Super).

•

One new 66kV transformer LV bay shall be provided as detailed in Main Scope of the Work. New protection relays based on Phase 13 specifications shall be provided.

•

New protection relays based on Phase 13 specifications shall be provided for existing two 220/66kV Power Transformer protections and one new 220/66kV Power Transformer protection. All modification on the 220kV and 66V sides of the 220/66kV Power Transformer protection shall be done to make it compatible with 220kV side protection. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between 220kV HV side (new 220kV Building) and existing 66kV LV switchgears and protection. Presently, transformer mechanical protections relays are provided in the 220kV HV panels as per old protection philosophy. However, new provision of transformer mechanical protections relays based on new 200/66kV, 200MVA transformer protection philosophy shall be contractor’s responsibility. Existing HV side panels shall be converted to LV side protection

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panels and exact details shall be decided during detail engineering. Existing Cable Differential relays provided 220kV HV panels and any other relays shall be dismantled and returned to Kahramaa store according to the standard procedure. Contractor shall ensure that the relays provided in 220kV Transformer HV Bays protection panels and those installed in 66kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the new 200/66kV Transformers shall be done in order to provide complete protection. •

Existing AVR equipment’s shall be used which are connected to 220kV side. It is not be required to shift to new 220kV Control room; however, it shall be decided during detailed engineering. Existing AVR equipment shall be tested and its proper functioning shall be ensured by the Contractor. Third AVR of new 200/66kV, 200MVA transformer may not be required to be integrated with two existing AVRs. However, all other features which are not dependent on existing AVR schemes shall be incorporated in accordance to specification requirement.

•

Modification of the existing 66kV bus bar protection, including conducting bus bar stability and addition of modules required shall be the responsibility of the Contractor.

•

Direct inter-trip for breaker failure, Pole discrepancy and Bus bar protection operation are to be made available between the stations based on requirement.

•

All modification, testing and commissioning, relay setting calculation, relay testing on final setting, Transformer differential and REF stability etc. and putting in service is included in the scope.


SCS & Associated Equipment •

Required Modifications in SCS of Alstom make supplied under Phase 8 project by Alstom to incorporate all substation modifications in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.

•

Additional hardware servers/gateways, if required, to be added to accommodate new 220kV voltage level BCUs/IEDs and future capacity.

•

GPS upgrade shall be carried out to accommodate CMS Time Synchronization for SCS, CMS, Telecom, etc. The existing GPS shall be handed over to KM.

•

For new common alarms contractor will use additional BCUs to maintain 20% spare availability.

•

SCS software upgrade to the latest stable version shall be carried out.

•

One HMI shall be provided in new 220kV relay room.

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•

Redundant Multimode FO cables shall be provided between existing control room to new 220kV relay room.

•

Min. 24 port Ethernet switch with VLAN capability shall be provided in NCC to enable the PMR service.

•

Works necessary to shift the PMR server and existing Telecom link to new switches in coordination with Telecom contractor. New CAT6 Ethernet cables shall be laid from new switch to PMR servers and all Telecom ports.


Online Monitoring System •

Condition monitoring system comprising of: - Partial discharge online monitoring system for 220kV GIS; - Online condition monitoring system for new 220/66kV, 200MVA Transformer; - Existing TMS can be modified/upgraded to integrate new transformer. - Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Existing transformers monitoring shall be shifted from Engineering PC to new TMS/ IMS PC. - Necessary LAN & WAN equipment including router/firewall for connection to remote end.


LV Power Cables, Control Cables with all accessories for the new equipment as well as for the connections to the existing equipment/systems. Sizing and Voltage drop calculation shall be strictly carried out for the cables to be proposed from existing LV services to the new building.
FO cable links to connect existing OTP to new OTP to maintain existing telecom connectivity
Earthing & Lightning Protection including connection to the existing system
Small Power & Lighting
LV Service Equipment and Works comprising of: •

The new LVAC Sub Distribution Board, for the new 220kV GIS building, 220/66kV transformer and HVAC units, and will be connected to the existing LVAC switchboard. Spare feeders are available in the existing LVAC Board. Modifications, if any, required for the above connections shall also be carried out.

•

The existing LVAC switchboard shall be extended to enable connection of the new LVAC Sub Distribution Board.

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•

The new LVDC Board, Battery and battery charger for the 220kV GIS & associated protection systems accommodated in the new building and for the new 220/66kV transformer.

•

New UPS to cater the additional load requirements in the new building.


Security Management System according to specification enclosed in section 3.3.15. •

Security management system shall cover both existing and new substation building and open areas. If due to bidders’ design there are more than one control rooms, the bidder shall be bound to provide additional SMS material, if required, for both control rooms.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Civil works: •

All civil works related to new 220kV GIS, the new 220/66kV transformer including building services and modifications of the existing building basement to enable cable routing.

•

Part of the existing boundary wall to be removed and re-constructed in new location as shown in the tender drawing.

•

220kV and 66kV Cable troughs for laying cables between new GIS/Transformers to existing transformers/GIS including duct banks and cross over arrangement with existing cable corridors.

•

LV cable troughs/duct banks for routing LV power & control cables, FO cables of SCADA/ Telecom etc between new and existing buildings.

•

New 220kV GIS building shall have space for 220kV GIS, 220kV Relay Panels and LV AC/DC Sub Distribution Boards and Battery room.

•

Existing 4m wide road to be demolished and reconstructed with 8m wide road as shown in the tender drawing.


Air-conditioning and ventilation systems to cover the new GIS.
220kV GIS room Cranes
Fire Fighting System •

Deluge Water Spray System for Power Transformer including related civil works such as trenches (@ road crossing for deluge pipes – as & where required).

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•

Tie-in works for connection with the existing deluge system / fire mains / fire pumping station

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformer. Transformer shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Fire Detection & Alarm System for the Transformer, GIS building, other areas and tie-in (connection/interfacing with existing fire detection & alarm system)

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all new cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.

•

Required modification works with the existing system (tie-in) for Fire Detection and Alarm System, testing & commissioning, battery calculations, replacement of batteries (as per calculations, if required) etc. in the existing Fire Detection & Alarm System (which must be verified during commissioning) are included in the present scope of works.

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH8 Contract during the tie-in works with the existing Fire Detection & Alarm System. Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card, interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving new 220KV GIS Fire alarm system, existing FACP shall be upgraded or replaced with new FACP.

•

Existing Fire Protection & Fire Detection & Alarm System drawings shall be updated. Connection to the existing Underground Remote Oil Containment Tank, if available OR new underground Remote Oil Containment Tank shall be constructed nearby to the 200MVA Transformer.


Power cables

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•

220kV, 1x1200mm2, XLPE, 200MVA, double circuit, single point earthed with earth continuity conductor cable link between 220kV GIS and the existing 220/66kV Transformers, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

220kV, 1x1200mm2, XLPE, 200MVA, single circuit, single point earthed with earth continuity conductor cable link between 220kV GIS and the new 220/66kV Transformer, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

66kV, 1x2000mm2, XLPE, 200MVA, single circuit, single point earthed with earth continuity conductor, two (2) cables per phase cable link between 220/66kV Transformers and 66kV GIS, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

Diversion of the existing 220kV, 1x1200mm2, XLPE, 210MVA, double circuits, from 220/66kV Transformer into the new 220kV GIS, laid in unfilled concrete troughs with all accessories. Approx. route length: 150m. Existing cables are laid under Phase 8 project (GTC142D/2006) by M/s Prysmian / Nexans Consortium.

•

Diversion of the existing DTS FO cables of approximately 2 x 150m related to diversion of the existing 220kV cables from diversion point to 220KV GIS, including splicing with existing DTS Cable. Re-commissioning of existing DTS Unit of SENSA make, model DTS 800 M12-6 (located at Airport Super).


Sequence of Construction Works •

Milestone A Complete 220kV GIS, 220/66kV Transformer, remote end works at Naeeja Super and energize substation from Naeeja Super.

•

Milestone B Diversion of the existing 220kV Incoming Cables from the existing 220/66kV transformers into new 220kV GIS and connect the existing 220/66kV transformers on to new 220kV GIS. Remote end works at Airport Super.


REMOTE END WORKS AT AIRPORT SUPER S/S 220/66/11kV Airport Super is an existing substation with 220kV GIS, 66kV GIS and 11kV Switchgear constructed under Phase 4 Project and further upgraded during Phase 5 project by M/s Siemens. Airport Super will remain connected to Doha Super by the diversion of the existing Double Circuit cable connection to the new GIS. All modifications, End to End test, testing and commissioning and putting into service of the two circuits required shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required

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works including, wiring, testing & complete re-commissioning of the above GIS bays. •

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Minor Modifications to SCS supplied by Siemens to include changes to 2x220kV cable bays in the SCS.

•

Minor modification to TMMC/TDB/RTU to incorporate the changes on the 220kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained.

•

Alarms no more required shall be deleted and those related to modifications are to be included in SCS and TMMC/TDB/RTU.


Protection •

Two 2x220kV existing (D30 and D40) bays to be connected to new GIS at Doha Super substation are already equipped with the Protection Relays/Equipments under GTC/144A/2006 Phase-8 project.

•

The relay provided at Airport Super for Main-1 protection is Alstom make P545 and for Main-2 Protection is Siemens make 7SD5. The new Relays/Equipment to be installed at Doha Super substation should match the protection at 220kV Airport Super Substation end (supplied under Phase-8 project).

•

All the required modifications in existing bays with provision of additional auxiliary relays, BCU/TMMC panels wiring etc. to meet the Phase-13 protection requirement shall be responsibility of contractor.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


DTS •

Re-commissioning of existing DTS Unit of SENSA make, model DTS 800 M12-6.


REMOTE END WORKS AT NAEEJA SUPER

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220/132/66/11kV Naeeja Super is an existing Substation with 132kV GIS, 66kV and 11kV Switchgear constructed by Siemens under Phase 6 and further upgraded with addition of 220kV GIS by Hyosung under Phase 10 Project. Naeeja Super will be connected with Doha Super by 1x220kV Cable circuit under separate Contract (GTC/736/2015, Package C2). All required modifications, End to End test, Testing & Commissioning and putting into service of the single new single circuit shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Required Modifications to SCS supplied by Siemens under Phase 6 project and further updated in the Phase 10 project to include changes to 1x220kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x220kV existing spare D30 bay to be connected to Doha Super Substation is with Protection Relays/Equipments under GTC/371/2010 Phase-10 Project.

•

The Relay provided at Naeeja Super for Main-1 Protection is Siemens make 7SD522 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Doha Super substation should match the protection at 220kV Naeeja Super Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract.

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Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement. 3.1.5

220/132/66/11KV AL WAAB SUPER SUBSTATION (UPGRADE) 220/132/66/11kV Al Waab Super is the existing substation built by M/s Siemens under Phase 7 project (GTC 123B/2006). Existing transformer feeder substation shall be upgraded by addition of 220kV GIS and one new 220/132kV, 315MVA transformer. Al Waab Super substation shall remain connected to Mehairja Super S/S by diverting the existing 2x220kV cables, currently connected to 220/132kV transformer to the new 220kV GIS. Installation of the new equipment as well as diversion of the existing 2x220kV cables are in the scope of this project. The principal elements for the upgrade of the 220/132/66/11kV Al Waab Super substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 220kV, 4000A at 40˚C, 50kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Three (3) Nos. outgoing Transformer bays for 220/132kV Transformers suitable for cable connection as per the approved connection arrangement; - Four (4) Nos. cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Existing 132kV GIS: - Convert the existing 1 x 132kV feeder bay to incoming Transformer bay for 220/132kV Transformer suitable for connection as per the approved connection arrangement; - Re-testing and Re-commissioning of 132kV Transformer LV C18 & C28 bays, 132kV Cable bay converted to Transformer LV bay including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.


Power Transformers •

An additional 220/132/33kV Power Transformer (Auto) 189/236/315MVA, YNa0 (d1), ONAN/ONAF/OFAF cooling, +10% -10% on load taps in steps of 1.25%, impedance as the existing Transformers on ONAN provided with AVR, terminal CTs, neutral CTs etc. Existing Transformers are having 13.44% impedance at

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ONAN. Matching of Percentage impedance of new Transformer with the existing Transformers shall be ensured by Contractor based on the site survey and Factory acceptance test reports of the existing Transformers. Electrical parameters of the new Transformer shall be identical to the existing Transformers to meet the conditions of parallel operation of all three units.
Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with the existing equipment and with remote ends (in line with remote end protection scope) shall be provided for the new feeders. However, the following specific requirements shall be considered:

•

For 2x220kV Cable Feeders to be connected to Mehairja Super substation, new relays and equipment shall be installed at Al Waab Super substation. End to End test, Testing and commissioning and putting into service of these three circuits shall be substation Contractor's responsibility.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 220kV control room to complete the necessary connection and end-to-end test of protection for the said links (New control room in Al Waab Super to Mehairja Super).

•

One existing 132kV cable spare bay shall be converted to 132kV Auto transformer LV bay as detailed in Main Scope of the Work. Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. Existing Cable bay protection panel shall be modified with provision of new 132kV transformer LV protection based on Phase 13 specifications. Existing Cable differential relays, Trip relays, TCS relays TBs, etc. shall be dismantled and returned to Kahramaa store according to the standard procedure.

•

New protection relays based on Phase 13 specifications shall be provided for existing two 220/132kV Auto Transformer protections and one new 220/132kV Power Transformer protection. All modification on the 220kV and 132V sides of the 220/132kV Auto Transformer protection shall be done to make it compatible with 220kV side protection. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between new 220kV HV side (new 220kV Building) and existing 132kV LV switchgears and protection.

•

Existing 220/132kV Auto Transformer protection panels (D11 & D21) are provided with one low impedance (7UT613) and one high impedance (DADN) differential protection, also, no tertiary winding earth fault protection is provided. New protection relays based on Phase 13 specifications (including two low impedance differential protections from different manufacturers and REF protection) shall be provided for existing 220/132kV Auto Transformer protection. The tertiary winding shall be protected separately against earth faults (1ph O/C relay-51N/50N), additional 1ph Ring CT on the neutral connection of the delta winding shall be provided. In addition to existing bushing neutral CT, additional ring type CT (of the similar characteristics) shall be provided on the neutral of the Auto-transformers.

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This Ring type CT shall be used for Protection applications and Bushing NCT shall be kept shorted. Presently, transformer mechanical protections relays are provided in the 220kV HV panels as per old protection philosophy. However, new provision of transformer mechanical protections High Impedance relays based on new 200/132kV, 315MVA transformer protection Phase 13 philosophy shall be contractor’s responsibility. Existing HV side panels shall be converted to LV side protection panels and exact details shall be decided during detail engineering. Existing Cable Differential relays provided 220kV HV panels and any other relays shall be dismantled and returned to Kahramaa store according to the standard procedure. •

Contractor shall ensure that the new relays provided in 220kV Transformer HV Bays protection panels and those installed in 132kV LV bays protection panels are complete so as to achieve a complete functional protection for the existing and new Auto Transformers. Testing and commissioning of the three 200/132kV Auto Transformers shall be done in order to provide complete protection.

•

Existing AVR equipments shall be used which are connected to 220kV side. It is not be required to shift to new 220kV Control room; however, it shall be decided during detailed engineering. Existing AVR equipment shall be tested and its proper functioning shall be ensured by the Contractor. Third AVR of new 200/132kV, 315MVA Auto transformer may not be required to be integrated with two existing AVRs. However, all other features which are not dependent on existing AVR schemes shall be incorporated in accordance to specification requirement.

•

Modification of the existing 132kV bus bar protection, including conducting bus bar stability and addition of modules required shall be the responsibility of the Contractor.

•

Direct inter-trip for breaker failure, Pole discrepancy and Bus bar protection operation are to be made available between the stations based on requirement.

•

All modification, testing and commissioning, relay setting calculation, relay testing on final setting, Transformer differential and REF stability etc. and putting in service is included in the scope.


SCS & Associated Equipment •

Required Modifications in SCS of Siemens make supplied under Phase 7 project by Siemens to incorporate all substation modifications in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.

•

Additional hardware servers/gateways, if required, to be added to accommodate new 220kV voltage level BCUs/IEDs and future capacity.

•

GPS upgrade shall be carried out to accommodate CMS Time Synchronization for SCS, CMS, Telecom, etc. The existing GPS shall be handed over to KM.

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•

For new common alarms Contractor will use additional BCUs to maintain 20% spare availability.

•

One HMI shall be provided in new 220kV relay room.

•

Redundant Multi mode FO cables, including OTBs, shall be provided between existing control room to new 220kV relay room.


Online Monitoring System •

Condition monitoring system comprising of: - Partial discharge online monitoring system for 220kV GIS; - Online condition monitoring system for new 220/132kV, 315MVA Transformer; - Existing TMS to be modified/upgraded to integrate new transformer. - Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Existing transformers shall be integrated to new TMS/IMS PC. - Necessary LAN & WAN equipment including router/firewall for connection to remote end.


LV Power Cables, Control Cables with all accessories for the new equipment as well as for the connections to the existing equipment/systems. Sizing and Voltage drop calculation shall be strictly carried out for the cables to be proposed from existing LV services to the new building.
Earthing & Lightning Protection including connection to the existing system;
Small Power & Lighting
LV Service Equipment and Works comprising of: •

The new LVAC Sub Distribution Board, for the new 220kV GIS building, 220/132kV transformer and HVAC units, connected to the existing LVAC switchboard. Spare feeders are available in the existing LVAC Board. Modifications, if any, required for the above connections shall also be carried out.

•

The existing LVAC switchboard shall be extended to enable connection of the new LVAC Sub Distribution Board.

•

The new LVDC Board, Battery and battery charger for the 220kV GIS & associated protection systems accommodated in the new building and for the new 220/132kV transformer.

•

New UPS to cater the additional load requirements in the new building.

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Security Management System according to specification enclosed in section 3.3.15. •

Security management system shall cover both existing and new substation building and open areas. If due to bidders’ design there are more than one control rooms, the bidder shall be bound to provide additional SMS material, if required, for both control rooms.

•

All SMS equipment at existing substation shall be decommissioned and dismantled, and handed over to KM.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Civil works: •

All civil works related to new 220kV GIS, the new 220/132kV transformer including building services and modifications of the existing building basement to enable cable routing.

•

New 220kV GIS building shall have space for 220kV GIS, 220kV Relay Panels and LV AC/DC Sub Distribution Boards and Battery room.

•

220kV and 132kV Cable troughs for laying cables between new GIS/Transformers to existing transformers/GIS including duct banks and cross over arrangement with existing cable corridors.

•

LV cable troughs/duct banks for routing LV power & control cables, FO cables of SCADA/ Telecom etc. between new and existing buildings.

•

Existing 6m wide road (from proposed transformer to existing gate) shall be demolished and re-constructed with 8m wide road.

•

Existing Fire shelter to be relocated (re-construction) to suitable location.

•

Existing duct bank edge to be extended to beyond the road edge.


220kV GIS room Cranes
Air-conditioning and ventilation systems to cover the new GIS.
Fire Fighting System •

Deluge Water Spray System for Power Transformer including related civil works such as trenches (@ road crossing for deluge pipes – as & where required).

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•

Tie-in works for connection with the existing deluge system / fire mains / fire pumping station

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformer. Transformer shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Fire Detection & Alarm System for the Transformer, GIS building, other areas and tie-in (connection/interfacing with existing fire detection & alarm system).

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all new cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.

•

Required modification works with the existing system (tie-in) for Fire Detection and Alarm System, testing & commissioning, battery calculations, replacement of batteries (as per calculations, if required) etc in the existing Fire Detection & Alarm System (which must be verified during commissioning) are included in the present scope of works.

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH7 Contract during the tie-in works with the existing Fire Detection & Alarm System. Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card, interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving new 220KV GIS Fire alarm system, existing FACP shall be upgraded or replaced with new FACP.

•

Existing Fire Protection & Fire Detection & Alarm System drawings shall be updated.


Underground Remote Oil Containment Tank, if available OR new underground Remote Oil Containment Tank shall be constructed nearby to the 315MVA Transformer.
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•

220kV, 1x1600mm2, XLPE, 315MVA, double circuit, single point earthed with earth continuity conductor cable link between 220kV GIS and the existing 220/132kV Transformers, laid in unfilled concrete troughs with all accessories. Approx. route length: 150m.

•

220kV, 1x1600mm2, XLPE, 315MVA, single circuit, single point earthed with earth continuity conductor cable link between 220kV GIS and the new 220/132kV Transformer, laid in unfilled concrete troughs with all accessories. Approx. route length: 150m.

•

132kV, 1x2000mm2, XLPE, 315MVA, single circuit, single point earthed with earth continuity conductor, one (1) cable per phase cable link between 220/132kV Transformer and 132kV GIS, laid in unfilled concrete troughs with all accessories. Approx. route length: 125m.

•

Diversion of the existing 220kV, 1x2500mm2, XLPE, 515MVA, double circuits, from 220/132kV Transformer into the new 220kV GIS, laid in unfilled concrete troughs with all accessories. Approx. route length: 150m. Existing cables are laid under Phase 7 project (GTC124B/2006) by M/s Mitsubishi Corporation.

•

Diversion of the existing DTS FO cables of approximately 2 x 250m related to diversion of the existing 220kV cables from diversion point to 220kV GIS, including splicing with existing DTS Cable. Re-commissioning of existing DTS Unit of J Power make, model SUT-15/12 (located at Al Wajbah Super) shall be also done.


Sequence of Construction Works •

Milestone A Complete 220kV GIS, 220/132kV Transformer with corresponding cable connections, convert one 220kV Incoming Cable from the existing 220/132kV transformers into new 220kV GIS and the corresponding remote end works at Mehairja Super.

•

Milestone B Convert the remaining 220kV Incoming Cable from the existing 220/132kV transformers into new 220kV GIS and connect the existing 220/132kV transformers on to new 220kV GIS. Remaining remote end works at Mehairja Super.


REMOTE END WORKS AT MEHAIRJA SUPER 220/66/11kV Mehairja Super is a new Substation with 220kV, 66kV GIS, and 11kV Switchgear being constructed under Phase 11 Project by M/s L&T. Al Waab Super will be connected to Mehairja Super (upon its completion) by loop-in/loop-out of the existing Al Wajbah Super – Al Waab Super double circuit cable lines. Mehairja Super will remain connected to Al Waab Super by the diversion of the existing Double Circuit cable connection from the 220/132kV transformers to the new 220kV GIS. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Mehairja Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. GTC-735 SCOPE OF WORKS R0

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The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS of ABB make supplied under Phase 11 project by M/s L&T to include changes to 2x220kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: 2x220kV existing bays to be connected to Al Waab Super Substation are with Protection Relays/Equipment’s under Phase-11 Project. •

The relay provided at Mehairja Super for Main-1 protection is ABB make RED670 and for Main-2 Protection is Siemens make 7SD52. The new Relays/Equipment to be installed at Al Waab Super substation should match the protection at 220kV Mehairja Super Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

3.1.6

220/66/11KV ABU HAMOUR SUPER SUBSTATION (UPGRADE) 220/66/11kV Abu Hamour Super substation is the existing Super substation built by Hyosung under phase 10 project. This substation shall be upgraded with the addition of one new 220/66kV, Power Transformer. Abu Hamour Super is connected to DSS by

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double circuit 220kV cable lines and with Abu Hamour North by double circuit 220kV cable lines. In addition to the existing connections, Abu Hamour Super S/S will be connected to DSS by 1x220kV cable circuit. The cables will be installed under separate Contract (GTC/736/2015, Package C2). The scope of works shall be as follows: •

An additional 220/66kV Power Transformer 120/150/200MVA, YNyn0 (d1), ONAN/ONAF/OFAF cooling, +10% -10% on load taps in steps of 1.25%, impedance as the existing Transformers on ONAN provided with AVR, terminal CTs, neutral CTs etc. Existing Transformers are having 12.28% impedance at ONAN. Matching of Percentage impedance of new Transformer with the existing Transformers shall be ensured by Contractor based on the site survey and Factory acceptance test reports of the existing Transformers. Electrical parameters of the new Transformer shall be identical to the existing Transformers to meet the conditions of parallel operation of all three units.

•

Existing 220kV GIS D31 bay and 66kV GIS B38 bay shall be used for connecting the additional Transformer.

•

Existing 220kV GIS D50 bay shall be used for connecting the new 220kV feeder from DSS.

•

One (1) no. 66kV, 200MVA SF6 Gas Insulated bus duct between 220/66kV Power Transformers & 66kV GIS including testing and commissioning.

•

Re-testing and Re-commissioning of one numbers of the existing switchgear D50 bay, 220kV Transformer HV D31 & LV B38 bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.


Protection Systems modification Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. However, the following specific requirements shall be considered: •

1x220kV existing spare D50 bay to be connected to DSS Substation is with Protection Relays/Equipment’s under Phase-10 Project.

•

The Relay provided at Abu Hamour Super substation for Main-1 Protection is Siemens make 7SD522 and Main-2 Protection is ABB make RED670 relays. The contractor shall ensure that the same Relays/Equipment installed at Abu Hamour Super substation shall match the protection at 220kV DSS Substation end. At both ends, existing relays shall be used. Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

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•

All modification on the existing 220kV spare Transformer bay (D31 & B38) protection as per standard specification, Protection SLD and Technical Schedules, testing and commissioning, relay setting calculation, relay testing on final setting, Transformer differential and REF stability test and putting in service are included in the present Scope.

•

Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between 220kV HV side and 66kV LV switchgears and protection. Provision of additional transformer mechanical protections relays based on new 200/66kV, 200MVA transformer shall be contractor’s responsibility. Contractor shall ensure that the existing relays provided in 220kV Transformer HV Bays protection panels and those installed in existing relays 66kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the new 200/66kV Transformers shall be done in order to provide complete protection.

•

Third AVR of new 200/66kV, 200MVA transformer may not be required to be integrated with two existing AVRs. However, all other features which are not dependent on existing AVR schemes shall be incorporated in accordance to specification requirement.

•

Modification of the existing 220kV and 66kV bus bar protection, including conducting bus bar stability and addition of modules required shall be the responsibility of the Contractor.

•

Direct inter-trip for breaker failure, Pole discrepancy and Bus bar protection operation are to be made available between the stations based on requirement.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

All modification, testing and commissioning, relay setting calculation, relay testing on final setting, Transformer differential and REF stability etc. and putting in service is included in the scope.


SCS & Associated Equipment •

Required Modifications in SCS of Siemens make updated under Phase 10 project by Hyosung to incorporate all substation modifications in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Online Monitoring System

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•

Required Modifications in the existing Partial discharge online monitoring system for 220kV and 66kV GIS;

•

Online condition monitoring system for new 220/66kV, 200MVA Transformer;

•

Existing TMS shall be modified/upgraded to integrate new transformer.


LV Service Equipment - Spare feeder outlets available in the existing LVAC board, LVDC Board and UPS are to be utilized for the new equipment. If required additional MCCB/MCBs are to be provided in the vacant blocks,
LV Power Cables, Control Cables with all accessories for the new equipment as well as for the connections to the existing equipment/systems.
Earthing & Lightning Protection shall be extended.
Small Power & Lighting
Fire Fighting System •

Deluge Water Spray System for Power Transformer including related civil works such as trenches (@ road crossing for deluge pipes – as & where required).

•

Tie-in works for connection with the existing deluge system / fire mains / fire pumping station

•

Fire Detection & Alarm System for the Transformer (connection/interfacing with existing fire detection & alarm system).

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformer. Transformer shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes all new cables.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas related to the installation of the new transformer.

•

Required modification works with the existing system (tie-in) for Fire Detection and Alarm System, testing & commissioning, battery calculations, replacement of batteries (as per calculations, if required) etc in the existing Fire Detection & Alarm System (which must be verified during commissioning) are included in the present scope of works.

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH10 Contract during the tie-in works with the existing Fire

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Detection & Alarm System. Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.




•

Introduction of loop card (if requires), interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS.

•

Existing Fire Protection & Fire Detection & Alarm System drawings shall be updated.

Connection to the existing underground Remote Oil Containment Tank.


Civil Works •

All required civil Works for the installation of the new Transformer.


Power cables •

220kV, 1x1200mm2, XLPE, 200MVA, single circuit, single point earthed with earth continuity conductor cable link between 220kV GIS and 220/66kV Transformer, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

66kV, 1x2000mm2, XLPE, 200MVA, single circuit, single point earthed with earth continuity conductor, two (2) cables per phase cable link between 220/66kV Transformers and 66kV GIS, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m (alternative to 66kV GI bus duct in case of layout difficulty).


REMOTE END WORKS AT DOHA SOUTH SUPER (DSS) SUBSTATION 400/220/132/11kV Doha South Super is an existing substation, built under 3 separate projects, where 220kV GIS is installed by Schneider under Phase 4 Project. DSS shall be connected to Abu Hamour Super by 1x220kV cable circuit. All required modifications, End to End test, testing and commissioning and putting into service of the new circuit shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing GIS D10 bay, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope

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•

Required modifications to the SCS supplied by ABB to include changes on the 220kV bay in the SCS. Three bays that were connected to Al Thumamah Super and Al Baraha Super are converted to spare bays through Phase 12 project and ready to be utilized for the connection to Abu Hamour Super.

•

Required modifications to existing Microsol RTU/TDB/TMMC equipment include changes to 1x220kV spare feeder D10 bay and S/S work necessary for NCC/ENCC end to end testing. Old Transducers shall be replaced and all related testing shall be done.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the conventional control panels and S/S work necessary for remote signaling to NCC/ENCC.


Protection

3.1.7

•

Relay Protection Equipment for the spare bay (D10 bay) as per standard specification, Protection SLD and Technical Schedules.

•

The Relay provided at two bays connected to Al Thumamah Super at DSS are Main-1 Protection is Siemens make 7SD522 and for Main-2 Protection is ABB make RED670. The contractor shall ensure that the same Relays/Equipment installed at Abu Hamour Super substation should match the protection at 220kV DSS Substation end. Both end substations, existing shall be used.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

400/220/132/66/11KV AL WAJBAH SUPER SUBSTATION (UPGRADE) 400/220/132/66/11kV Al Wajbah Super substation is the existing Super substation built by ABB under phase 7 project and further upgraded with 400kV GIS under GTC318B/2009 project. This substation shall be expanded with the addition of two new 220kV GIS bays. The scope of works shall be as follows: •

Two (2) Nos. of 220kV GIS feeder bays.

•

Extend the existing double bus bar.


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•

Relay Protection Equipment for new Bays as detailed in Main Scope of Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

1x220kV new extended bay will be connected to 220/66/11kV Mehairja Super being constructed by L&T under Phase 11 Addendum Project. The Relay provided at Mehairja Super for Main-1 Protection is ABB make RED670 and for Main-2 Protection is Siemens make 7SD522. The new Relays/Equipment to be installed at Al Wajbah Super substation should match the protection at 220kV Mehairja Super Substation end (supplied under Phase 11 Addendum project).

•

Existing Distributed ABB make Low Impedance 220kV Bus bar protection is provided. Modification of the existing distributed 220kV bus bar protection, including conducting bus bar stability and addition of modules required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, Pole discrepancy and Bus bar protection operation are to be made available between the stations based on requirement.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Direct inter-trip for breaker failure, Pole discrepancy and Bus bar protection operation are to be made available between the stations based on requirement.


SCS & Associated Equipment •

Required Modifications in SCS of ABB make updated under GTC318B/2009 project by ABB to include addition of new 220kV bays in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


LV Service Equipment shall be extended,
LV Power Cables, Control Cables with all accessories shall be extended,
Earthing & Lightning Protection shall be extended.
Civil Works •

All required civil Works for the installation of the new bays.


REMOTE END WORKS AT MEHAIRJA SUPER 220/66/11kV Mehairja Super is a new Substation with 220kV, 66kV GIS, and 11kV Switchgear being constructed under Phase 11 Project by M/s L&T. Al Wajbah Super will be connected to Mehairja Super (upon its completion) by single circuit cable line. GTC-735 SCOPE OF WORKS R0

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All required modifications, End to End test, testing and commissioning and putting into service of one circuit shall be carried out under the scope of this project. Modification works at Mehairja Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing switchgear bay, including required modifications in the existing switchgear bay along with Local Control Panel including Indicating Meters in the Local Control Panel, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS of ABB make supplied under Phase 11 project by M/s L&T to include changes to 1x220kV Cable feeder in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: 1x220kV existing bays to be connected to Al Wajbah Super Substation are with Protection Relays/Equipment’s under Phase-11 Project. •

The relay provided at Mehairja Super for Main-1 protection is ABB make RED670 and for Main-2 Protection is Siemens make 7SD52. The new Relays/Equipment to be installed at Al Wajbah Super substation should match the protection at 220kV Mehairja Super Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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PACKAGE S-2

3.2

3.2.1

132/66/11KV UMM EBAIRIYA SUBSTATION 132/66/11kV Umm Ebairiya substation is intended to cater Power supply to the new growing demands in the surrounding Al Sakhama area. Umm Ebairiya will be connected to Al Sakhamah Super by 132kV double circuit cables. Also, Umm Ebairiya substation will be connected to Umm Al Amad-1 substation at 66kV level by 2x66kV Cable feeders. These cable circuits will be installed under separate Contract (GTC/736/2015, Package C4). Besides, existing 2x66kV OHL feeders from Abu Thailah-Umm Salal will be diverted to Umm Ebairiya to have final configuration 2x66kV OHL Abu-Thailha- Umm Ebairiya feeders. All the works related to diversion of these OHL feeders are part of this scope The principal elements of the new 132/66/11kV Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus Section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. Outgoing Transformer bays for 132/66kV Transformers; - Six (6) Nos. Cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on each side of the switchgear.

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus Section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. incoming Transformer bays for 132/66kV Transformers suitable for GIB connection as per the approved connection arrangement; - Two (2) Nos. Outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) spare bays); - Two (2) nos. 66kV, 160MVA SF6 Gas Insulated bus duct between 132/66kV Power Transformers & 66kV GIS. - Space for four future bays, two on each side of the switchgear.

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

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- One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future capacitor bank; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/66kV, 96/120/160MVA, YNyn0 (d1) ONAN/ONAF/OFAF cooling, ±10% on load taps in steps of 1.25%, 13% impedance on ONAN (96 MVA), provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV 32/40MVA Power Transformer.

•

Space for four (4) future capacitor banks along with space for four (4) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two 2 Nos. Auxiliary Transformers 11/0.415kV, 1600kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 6% impedance, neutral CTs, etc.

•

The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, load for two future 66/11kV Transformers, future 11kV switchgear B & associated equipment with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all Bays) as detailed in Main Scope of Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end shall be provided for feeders connected to Al Sakhamah Super and Abu Thailah substations (in line with remote end protection scope of works).

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•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV incomer bays and each of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each Switchgear, i.e., for a two Switchgear Substation (A & B) there shall be two load shedding panels. Note: OHL between new TC near Umm Ebairiya and Abu Thailah is equipped with one OPGW (24fibres).


SCS & Associated Equipment Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and s/s works necessary for NCC/ENCC/DCC End – to – End testing.
Online Monitoring System •

Condition monitoring system comprising of: - Online condition Transformers

monitoring

system

for

132/66kV,

96/120/160MVA

- 132kV and 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM) - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement. TECHNICAL AFFAIRS Electricity Projects Dept.

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- Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.
LV Power Cables, Control Cables with all accessories.
Small Power & Lighting
Earthing & Lightning Protection.
LV Service Equipment with all accessories, sized for the 132/66/11kV substation including future 11kV (B) switchgear and future 2 x 66/11kV Transformers.
Security Management System according to specification enclosed in section 3.3.15.
Civil works: •

All civil works related to new 132/66/11kV substation including building services,

•

The substation layout shall have space for future 11kV (B) switchgear and space for future 2 x 66/11kV Transformers.

•

Control & relay room building shall be sized to accommodate the requirements of the above future equipment such as control and relay panels, LV Service equipment etc.


132kV and 66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

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•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment
Power Cables: •

132kV, 1x800 mm2, XLPE, 160MVA, double circuit, solid bonded cable links between 132kV GIS and 132/66kV Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

66kV, 1x2000mm2, XLPE, 160MVA, double circuit, single point earthed with earth continuity conductor cable links between 66kV GIS and 132/66kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 100m (alternative to 66kV GI bus duct in case of layout difficulty).

•

66kV, 1x500 mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20 m.

•

11kV, 1x500mm2, XLPE, 1600kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

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REMOTE END WORKS AT AL SAKHAMAH SUPER 400/132/11kV Al Sakhamah Super is a new Substation, being constructed under Phase 12 Project. Umm Ebairiya shall be connected to Al Sakhamah Super by double circuit 132kV Cable Line. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Al Sakhamah Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including replacing of feeder Name Plates in the front and rear side of GIS, Local Control Panels, and any required works including, wiring, testing & complete recommissioning of the above switchgear bays as applicable for establishing the connection with Umm Ebairiya Substation.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 2x132kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

2x132kV existing bays to be connected to Umm Ebairiya Substation are with Protection Relays/Equipments under Phase-12 Project.

•

The new Relays/Equipment to be installed at Umm Ebairiya substation should match the protection at 132kV Al Sakhamah Super Substation end (supplied under Phase-12 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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REMOTE END WORKS AT ABU THAILAH S/S 66/11kV Abu Thailah substation is the existing substation built by M/s Siemens under phase 7 project and updated by M/s Hyosung under Phase 9 project. Existing OHL connection Abu Thailah – Umm Salal S/S shall be diverted from Umm Salal S/S to Um Ebairiya S/S. Construction of the new Terminal Compound (TC), dismantling of the existing OHL from TC to Umm Salal S/S shall be done under this project. Laying of the new 66kV double circuit from TC to Um Ebairiya S/S shall be done under this project. All modifications, End to End test, testing and commissioning and putting into service of the two OHL circuits required shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the exiting GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Existing Substation Control System supplied by Siemens under phase 7 project shall be updated Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection •

2x66kV existing OHL bays to be connected to Umm Ebairiya Substation are with Protection Relays/Equipments under Phase-7 Project. •

The relay provided at Abu Thailah substation for Main-1 protection is Siemens make 7SD5 an Existing 7SD532 relay shall be upgraded and new relay shall be installed in place of existing P543 relay at Abu Thailah substation to match the protection provided at Umm Ebairiya Substation.

•

Contractor shall change “Communication Module” in 7SD532 relay and make them suitable for “Dual Fiber Optic Communication”.

•

Separate Three Phase Auto recloser relays and Auto recloser scheme shall be provided in the 2x66kV existing OHL bays.

•

Existing trip relays / TCS relays shall be replaced with new relays.

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3.2.2

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•

Note: OHL between new TC near Umm Ebairiya and Abu Thailah is equipped with one OPGW (24fibres).

•

Existing telecommunication equipments at Abu Thailah shall be dismantled by telecom contractor. However, all the required scheme and wiring changes shall be done under this Contract.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

66/11KV UMM AL AMAD-1 SUBSTATION 66/11kV Umm Al Amad-1 substation is intended to cater Power supply to the new growing demands in the surrounding Al Sakhama area along with Al Sakhamah Super and Umm Ebairiya S/Ss. Umm Al Amad-1 will be connected to Umm Ebairiya by 66kV double circuit cable lines under the separate Contract (GTC/736/2015, Package C4). The principal elements of the new 66/11kV Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus Section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. Outgoing Transformer bays for 66/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear.

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A;

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- Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future capacitor bank; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks along with space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc.

•

The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all Bays) as detailed in Main Scope of Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end shall be provided for feeders connected to Umm Ebairiya substation.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

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Separate panel shall be provided for each of the 11kV incomer bays and each of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each Switchgear, i.e., for a two Switchgear Substation (A & B) there shall be two load shedding panels.


SCS & Associated Equipment Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and s/s works necessary for NCC/ENCC/DCC End – to – End testing.
Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM) - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All Civil works related to new 66/11kV substation including building services,
66kV GIS & Fire Pump room Cranes GTC-735 SCOPE OF WORKS R0

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Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment
Power Cables: •

66kV, 1x500 mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20 m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Remote End S/S Works at Umm Ebairiya S/S The remote end substation is also to be built under the same package and will be connected to the new UAA-1 S/S with 2x66kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C4). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these

feeders into service.

3.2.3

132/11KV UMM GARN SUBSTATION 132/11kV Umm Garn substation is intended to cater power supply for the surrounding area. Umm Garn S/S will be connected by 2x132kV cable circuits Al Sakhama Super and Semaisma substations. Both these cable circuits will be installed under separate Contract (GTC/736/2015, Package C4): The principal elements of new 132/11kV Umm Garn substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. Shunt Reactor bays suitable for Double bus bar system with single pole Circuit breakers Note: Controlled switching device to be included and CB shall be capable for reactor switching - Alternatively, Two numbers of 132kV GIS Bay for Shunt Reactor without Switching Device Note: Contractor shall make study and confirm suitability of the proposed GIS Bay without controlled switching device. This alternative item will be applicable subject to such confirmation - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers;

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- Six (6) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear; •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Two (2) Nos. 132kV, 15MVAr Shunt Reactors with terminal CTs, neutral CTs etc.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end

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(in line with remote end protection scope of works) shall be provided for feeders connected to Al Sakhamah Super and Semaismah substations. The new relays to be installed at 132/11kV Umm Garn substation shall match the protection at Al Sakhamah Super and Semaismah substation ends. •

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV incomer bays and each of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each Switchgear, i.e., for a two Switchgear Substation (A & B) there shall be two load shedding panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - Online monitoring system for 15MVAr Shunt Reactors; - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement. TECHNICAL AFFAIRS Electricity Projects Dept.

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- Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
Civil works: •

All civil works related to new 132/11kV substation including building services,

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Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities.
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers & Shunt Reactors. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

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132kV, 1x500mm2, XLPE, 15MVA, double circuit, solid bonded cable links between 132kV GIS and 132kV Shunt Reactors laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT SEMAISMAH S/S 132/11kV Semaismah is an existing substation built by Hyosung under Phase 9 Project. Semaismah will be connected to Umm Garn by 2x132kV, cable circuits. All modifications, End to End test, testing and commissioning and putting into service of the two circuits required shall be carried out under the scope of this project. Modification works at Semaismah shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Siemens make supplied by Hyosung under Phase 9 project to include changes to 2x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.

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Protection 2x132kV existing bays to be connected to Umm Garn substation are with Protection Relays/Equipments under GTC/240B/2008 Phase-9 project. •

The relay provided at Semaismah for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Umm Garn substation should match the protection at 132kV Semaismah Substation end (supplied under Phase-9 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT AL SAKHAMAH SUPER 400/132/11kV Al Sakhamah Super is a new Substation, being constructed under Phase 12 Project. Umm Garn shall be connected to Al Sakhamah Super by 2x132kV cable circuits. All modifications, End to End test, testing and commissioning and putting into service of the two circuits required shall be carried out under the scope of this project. Modification works at Al Sakhamah Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including replacing of feeder Name Plates in the front and rear side of GIS, Local Control Panels and any required works including, wiring, testing & complete recommissioning of the above switchgear bays as applicable for establishing the connection with Umm Garn Substation.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 2x132kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

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Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection:

3.2.4

•

2x132kV existing bays to be connected to Umm Garn Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope. The new Relays/Equipment to be installed at Umm Garn substation should match the protection at 132kV Al Sakhamah Super Substation end (supplied under Phase-12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

66/11KV ABU THAILAH SUBSTATION (UPGRADE) 66/11kV Abu Thailah substation is existing substation built by M/s Siemens under phase 7 project and modified by M/s Hyosung under Phase 9 project. Existing substation shall be upgraded by addition of two new 66/11kV transformers and 11kV switchgear (11kV-B). Existing OHL connection Abu Thailah – Umm Salal S/S shall be diverted from Umm Salal S/S to Um Ebariya S/S. Construction of the new Terminal Compound (TC), dismantling of the existing OHL from TC to Umm Salal S/S shall be done under this project. Laying of the new 66kV double circuit from TC to Um Ebariya S/S shall be done under this project. All required modifications, End to End test, testing and commissioning and putting into service of the two OHL circuits shall be carried out under the scope of this project. In addition, the existing OHL connection Umm Al Ghahab – Umm Salal S/S shall be diverted from Umm Salal S/S to Umm Al Amad Super S/S. Construction of the new Terminal Compound (TC), dismantling of the existing OHL from TC to Umm Salal S/S shall be done under this project. Laying of the new 66kV double circuit from TC to Umm Al Amad Super S/S shall be done under this project. The principal elements of the upgraded 66/11kV Abu Thailah substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Modification of the existing 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS to connect the new transformers on the existing bays:

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- Convert the existing 2 x 66kV OHL feeder (B30 and B40) bay into the outgoing Transformer bay for 66/11kV Transformer suitable for connection as per the approved connection arrangement; •

The SOW includes but is not limited to the following: - Re-testing and Re-commissioning of two numbers of the existing (B30 and B40) GIS bays converted to 66/11kV Transformer HV side bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: - Existing switchgear shall be named Switchgear A;

•

11kV Switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Existing Auxiliary transformers shall remain in function.


Protection:

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Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. However, the following specific requirements shall be considered: •

Two existing cable spare bays (B30 and B40 bays) shall be converted to 66kV transformer bays as per above SOW. The Contractor shall provide complete 66/11kV transformer, HV side protection as per Phase-13 specification. CT adequacy shall be checked. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between existing 66kV HV side and new 11kV LV switchgears and protection. Contractor shall ensure that the new relays provided in 66kV Transformer HV Bays protection panels and those installed in new 11kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the new 66/11kV Transformers shall be done in order to provide complete protection.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 66kV control room to complete the necessary connection and end-to-end test of protection for the said links (New control room in Abu Thailah to Umm Ebairiya).

•

Modifications of the existing Siemens make centralized Low Impedance Busbar protection, including conducting bus bar stability and addition of modules, if required shall be provided under this Contract.

•

Existing 11kV Switchgear shall be marked as 11kV Switchgear A with appropriate name plates and indications in SCS/NCC. Any required changes to existing protection relay settings, testing and re-commissioning of existing 25MVA transformer, 11kV Switchgear and earthing transformer shall be the responsibility of the Contractor.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

All required modifications in SCS of SIEMENS make supplied under Phase 7 project by SIEMENS to incorporate all substation modifications in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

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•

Additional hardware servers/gateways, if required, to be added to accommodate new 11kV voltage level BCUs/IEDs and future capacity.

•

For new common alarms the contractor shall use additional BCUs to maintain 20% spare availability.

•

One HMI shall be provided in new 11kV relay room.

•

Redundant Multimode FO cables, including OTBs shall be provided between existing control room to new 11kV relay room.

•

New transformer related mechanical protection signals shall be configured in Transformer LV feeders.


Online Monitoring System •

Condition monitoring system comprising of: - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories for the new equipment as well as for the connections to the existing equipment/systems. Sizing and Voltage drop calculation shall be strictly carried out for the cables to be provided from existing LV services to the new building;
Small Power & Lighting
Earthing & Lightning Protection for new equipment and integration with existing earthing system.
LV Service Equipment and Works for the newly installed equipment •

The new LVAC Sub Distribution Board, for the new switchgear building, 66/11kV transformers and HVAC units and will be connected to the existing LVAC

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switchboard. Spare feeders are available in the existing LVAC Board, modifications, if any, required for the above connections shall also be carried out. •

The new LVDC Board, Battery and battery charger for the 11kV switchgear & associated protection systems accommodated in the new building and for the new transformers

•

New UPS to cater the additional load requirements in the new building.

•

Existing LV Service Equipment shall remain in function.


Security Management System according to specification enclosed in section 3.3.15.


Security management system shall cover both existing and new substation building

and open areas. If due to bidders’ design there are more than one control rooms, the bidder shall be bound to provide additional SMS material, if required, for both control rooms.


All SMS equipment at existing substation shall be decommissioned and dismantled, and handed over to KM.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Civil works •

All civil works related to new building for 11kV switchgear B & relay panels and 66/11kV transformers including building services,


Air-conditioning and ventilation systems to cover new 11kV switchgear and Control & Relay buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers including related civil works such as trenches (@ road crossing for deluge pipes – as & where required).

•

Tie-in works for connection with the existing deluge system / fire mains / fire pumping station

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformer. Transformer shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

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Fire Detection & Alarm System for the Transformer, SWGR Room and tie-in (connection/interfacing with existing fire detection & alarm system)

•

Passive fire protection system – Cable Coating for all new cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.

•

Required modification works with the existing system (tie-in) for Fire Detection and Alarm System, testing & commissioning, battery calculations, replacement of batteries (as per calculations, if required) etc. in the existing Fire Detection & Alarm System (which must be verified during commissioning) are included in the present scope of works.

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH7 Contract during the tie-in works with the existing Fire Detection & Alarm System. Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card (if requires), interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving new SWGR & Transformer areas Fire alarm system, existing FACP shall be upgraded or replaced with new FACP.

•

Existing Fire Protection & Fire Detection & Alarm System drawings shall be updated. Deluge Water Spray System for Power Transformers & Auxiliary Transformers


Connection to the Underground Remote Oil Containment Tank, if available OR new underground Remote Oil Containment Tank shall be constructed nearby to the Transformers.
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

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11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


66 KV OH/Line Double Circuit OH/Line Abu Thailah S/S / Umm Salal S/S diversion to Umm Ebairiya S/S This is an existing 66kV double circuit Overhead Transmission Line on Steel Lattice towers with single Conductors per phase type ZEBRA and one earthwire type OPGW (24 fibres) with an approximate total length of 13km and total number of 42 towers (to be operated on 66kV level). The Contractor shall install a cable compound near existing tower no. 10 close to new Umm Eberia S/S in order to enable connection of the subject 66kV OHL and Umm Eberia substation. The works shall include (but not be limited to) design, supply, installation and commission of:

•

New Terminal Tower with foundation, earthing, etc.,

•

Two single circuit 66kV OHL gantries with their foundations,

•

Cable Compound Palisade Fence complete with gate, foundations, earthing, kerb stone etc.,

•

RTV coated OHL insulators and insulator/conductor fittings to match insulators on the existing OHL,

•

OHL down droppers between the terminal tower and gantries,

•

OHL jumpers between OHL gantries and cable sealing ends & lighting arresters,

•

All necessary OHL conductor branches and OHL conductor connectors and links,

•

Installation/Replacement of Tower/Line identification plates as required,

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Cable compound earthing and earthing connections to cable compound equipment shall be with no more than 5Ω resistance to earth for each structure,

•

All related civil works (foundation, grading, levelling, backfilling, gravelling, etc.),

•

Dismantling of the complete 66kV OHL portion between Umm Salal S/S and Umm Eberia S/S (10 OHL towers, two single gantries, conductors, OPGW, insulators and cable compound in front Umm Salal S/S, completely together with foundations to 2m depth under the ground).

•

Include installation of OPGW hood closure at new cable compound near Umm Eberia S/S, OPGW suspension and tension fitting’s sets. After completion of OPGW diversion work, the Contractor shall perform End to End testing of the complete optical link.

The handling of the dismantled materials shall be in accordance with the Environmental requirements and any benefit (e.g. payment for scrap material) shall be to the Contractors account. Accordingly, the Bidder shall provide the price (Disposed Material for OHL of Price schedules) which will be compensated to Kahramaa, i.e. deducted from the corresponding item in Price schedule. The Contractor shall submit detailed method statement for the above works, with clearly indicated outage schedule, which shall be subject of final Kahramaa approval. All required modifications at Abu Thailah S/S, Umm Salal S/S, LCC, SCS, etc. shall be covered under this SOW Item.
66kV OH/Line Double Circuit OH/Line Umm Salal S/S / Umm Al Ghahab S/S diversion to Umm Al Amad Super S/S This is an existing 66kV double circuit Overhead Transmission Line on Steel Lattice towers with single Conductors per phase type ACSR RACOON and one earthwire (1x Steel 7/12) with an approximate total length of 14.75km and total number of 63 towers. The Contractor shall install a cable compound near existing tower no. 29 close to existing Umm Al Amad S/S in order to enable connection of the subject 66kV OHL and Umm Al Amad substation. The works shall include (but not be limited to) design, supply, installation and commission of: •

New Tower with foundation, earthing, etc.,

•

Two single circuit 66kV OHL gantries with their foundations,

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•

Cable Compound Palisade Fence complete with gate, foundations, earthing, kerb stone etc.,

•

RTV coated OHL insulators and insulator/conductor fittings to match insulators on the existing OHL,

•

OHL down droppers between the terminal tower and gantries,

•

OHL jumpers between OHL gantries and cable sealing ends & lighting arresters,

•

All necessary OHL conductor branches and OHL conductor connectors and links,

•

Installation/Replacement of Tower/Line identification plates as required,

•

Cable compound earthing and earthing connections to cable compound equipment shall be with no more than 5Ω resistance to earth for each structure,

•

All related civil works (foundation, grading, levelling, backfilling, gravelling, etc.),

•

Dismantling of the complete 66kV OHL portion between Umm Salal S/S and Umm Al Amad S/S (27 OHL towers, two single gantries, conductors, OPGW, insulators and cable compound in front Umm Salal S/S, completely together with foundations to 2m depth under the ground).

Replacement of existing earthwire (1x Steel 7/12) with new OPGW (48 fibres) on the OHL portion between Umm Al Amad S/S and Umm Al Ghahab S/S, installation of OPGW splice and hood closures, OPGW suspension and tension fitting’s sets, etc. After completion of OPGW diversion work, the Contractor shall perform End to End testing of the complete optical link. The handling of the dismantled materials shall be in accordance with the Environmental requirements and any benefit (e.g. payment for scrap material) shall be to the Contractors account. Accordingly, the Bidder shall provide the price (Disposed Material for OHL of Price schedules) which will be compensated to Kahramaa, i.e. deducted from the corresponding item in Price schedule. The Contractor shall submit detailed method statement for the above works, with clearly indicated outage schedule, which shall be subject of final Kahramaa apprval. All required modifications at Umm Al Amad S/S, Umm Al Ghahab S/S, LCC, SCS, etc. shall be covered under this SOW Item.
Laying of new Cables Lying of the new 66kV double circuit from TC to Um Ebariya S/S shall be done under this project.

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In addition, laying of the new 66kV double circuit from TC to Umm Al Amad Super S/S shall be done under this project. Contractor should make all necessary arrangements to connect cable circuits at Terminal Compounds near Umm Ebariya & Umm Al Amad Super substations. •

Surge Arrestors for 4 x 66kV OHL feeders

•

66kV, 1x2000mm2, XLPE, 120MVA, double circuit underground power cables and the associated communication cables (48 fiber optic pilot) between terminal compound at TC-point to 66KV GIS at Um Ebariya substation. Approximate route length: 600 m.

•

2 x 66kV, Cable Sealing Ends suitable for terminating above UG Cables and 66kV OHL feeders from Abu Thailah substation.

•

66kV, 1x2000mm2, XLPE, 120MVA, double circuit underground power cables and the associated communication cables (48 fiber optic pilot) between terminal compound at TC-point to 66KV GIS at Umm Al Amad Super substation. Approximate route length: 300 m.

•

2 x 66kV, Cable Sealing Ends suitable for terminating above UG Cables and 66kV OHL feeders from Umm Al Ghahab substation.

•

All required co-ordination with Telecom contractor as per the responsibility matrix included in this scope of work.


Sequence of Construction Works •

Milestone A Complete Substation extension, complete one new 66kV cable Um Ebariya to TC and one new 66kV cable Umm al Amad Super to TC and the remote end works at Umm al Amad Super, Umm AL Ghalab and Umm Salal S/Ss.

•

Milestone B Complete the second new 66kV cable Um Ebariya to TC and second new 66kV cable Umm al Amad Super to TC and the corresponding remote end works.


REMOTE END WORKS AT UMM SALAL S/S 132/66/11kV Umm Salal is an existing 132/66/11kV substation with 132kV GIS, 66kV GIS and 11kV Switchgear built by Siemens under Phase 6 Project. Umm Salal is presently connected to Abu Thailah and Umm Al Ghahab S/Ss by OHL double circuits. Through the specified OHL circuit modifications under this package, the connection to Abu Thailah will be changed to Umm Ebairiya & connection to Umm Al Ghahab will be changed to Umm Al Amad Super Substations. With these changes the OHL bays at Umm Salal S/S will

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become spare. All modifications to convert these existing OHL bays into spare bays shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Required modifications in the existing GIS bays into spare bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 6 project to include changes to 4x66kV OHL feeders into spare feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.


Protection Four 4x66kV existing bays to be disconnected from Abu Thailah and Umm Al Ghahab S/Ss are with Protection Relays/Equipments under Phase-6 project. •

All modifications to change the OHL bays into spare are included in the Present Scope.


REMOTE END WORKS AT UMM AL GHAHAB S/S 66/11kV Umm Al Ghahab is an existing 66/11kV substation with 66kV GIS and 11kV Switchgear built by Siemens under Phase 10 Project. Umm Al Ghahab will be connected to Umm Al Amad Super S/S by diverting the existing 2x66kV, OHL, Umm Salal – Umm Al Ghahab into 66kV GIS at Umm Al Amad Super S/S. Construction of the new Terminal Compound (TC), dismantling of the existing OHL from TC to Umm Salal S/S shall be done under this project along with the laying of the new 66kV double circuit from TC to Umm Al Amad Super S/S. All required modifications, End to End test, testing and commissioning and putting into service of the two OHL circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:

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SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 10 project to include changes to 2x66kV OHL feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Gateway communication shall be changed from IEC-101 to IEC-104. All necessary testing shall be carried out after change over.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Umm Al Amad Super substation are with Protection Relays/Equipments under Phase-10 project. •

The relay provided at Umm Al Ghalab for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The relay provided at UAA Super substation for Main-1 protection is Alstom make P545 and for Main-2 Protection is make 7SD5 relays. The new Relays/Equipment (mainly, Main-2RED670 relay) to be installed and Main-1 as 7SD53 relay at Umm Al Amad substation should match the protection at 66kV Umm Al Ghahab Substation end (supplied under Phase-10 project).

•

The existing main relays provided at Umm Al Ghalab are not connected to any fibre Optic/ OPGW and hence, new provision of fibre optic patch cords is included in present scope. Note: OHL between new TC near Umm Al Ghahab and Umm Al Ghahab shall be equipped with one OPGW (48fibres).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT UAAS S/S 400/220/66/11kV Umm Al Amad Super is an existing substation with 400kV GIS, 220kV GIS, 66kV GIS and 11kV Switchgear built by Alstom under Phase 8 Project. UAAS will be connected to Umm Al Ghahab by diverting the existing 2x66kV, OHL, Umm Salal – Umm GTC-735 SCOPE OF WORKS R0

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Al Ghahab into 66kV GIS at Umm Al Amad Super S/S. Construction of the new Terminal Compound (TC), dismantling of the existing OHL from TC to Umm Salal S/S shall be done under this project along with the laying of the new 66kV double circuit from TC to Umm Al Amad Super S/S. All modifications, End to End test, testing and commissioning and putting into service of the two circuits required shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays for new OHL connection, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Alstom under Phase 8 project to include changes to 2x66kV OHL feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Umm Al Ghalab substation are with Protection Relays/Equipments under GTC/144A/2006 Phase-8 project. •

The relay provided at Umm Al Ghalab for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The relay provided at UAA Super substation for Main-1 protection is Alstom make P545 and for Main-2 Protection is make 7SD5 relays for UGC cable protection. All the modifications at UAA Super substation shall be carried out to have OHL protection with new Auto recloser relay and associated Autocloser scheme. The new Relays/Equipment (mainly, Main-2-RED670 relay) to be installed and Main-1 as 7SD53 relay at Umm Al Amad substation should match the protection at 66kV Umm Al Ghahab Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope. Note: OHL between new TC near Umm Al Ghahab and Umm Al Ghahab shall be equipped with one OPGW (48fibres).

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•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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PACKAGE S-3

3.3

3.3.1

132/11KV AL JAHHANIYA 2 SUBSTATION 132/11kV Al Jahhaniya 2 substation is intended to cater power supply for the surrounding area including temporary power feed for Rayyan Stadium. Al Jahhaniya 2 S/S will be connected to network by looping in looping out (LILO) following existing single 132kV cable circuits: • • •

Bani Hajer Super – Barzan Camp 1, Bani Hajer Super – Al Jahhaniya 1 and Al Jahhaniya – 1 – Barzan Camp 1.

LILO of the cable circuits Bani Hajer Super – Al Jahhaniya 1 and Al Jahhaniya – 1 – Barzan Camp 1 into Jahhaniya – 2 are the scope of this project, while LILO of the cable circuit Bani Hajer Super – Barzan Camp 1 into Jahhaniya – 2 shall be done through separate cable contract (GTC-736/2015 Package C5). The principal elements of new 132/11kV Al Jahhaniya 2 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Eight (8) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


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•

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for two (2) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, load for two future 132/11kV Transformers, load for future 11kV switchgear B with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Bani Hajer Super, Barzan Camp 1 and Al Jahhaniya 1 substations. The new relays to be installed at 132/11kV Al Jahhaniya 2 substation shall match the protection at Bani Hajer Super, Barzan Camp 1 and Al Jahhaniya 1 substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing

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Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories, sized for the 132/11kV substation including future 11kV switchgear-B and future 2 x 132/11kV, 32/40MVA Transformers.
Security Management System according to specification enclosed in section 3.3.15.
Civil works: •

All civil works related to new 132/11kV substation including building services,

•

The substation layout shall have space for future 11kV switchgear-B and space for future 2 x 132/11kV, 32/40MVA Transformers.

•

Control & relay room building shall be sized to accommodate the requirements of the above future equipment such as control and relay panels, LV Service equipment etc.


132kV GIS & Fire Pump room Cranes

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Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits listed below shall be diverted into the Al Jahhaniya 2 substation under the present Scope of Work: •

1 x 132kV Bani Hajer Super – Al Jahhaniya 1 and

•

1 x 132kV Al Jahhaniya 1 – Barzan Camp 1.

The substation Contractor should make all necessary arrangements to connect cable circuits at Al Jahhaniya 2 substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. Refer to attached drawing no. TRANS-52015. •

Diversion (Loop in / Loop out) of existing single circuit 132kV, 1x2000mm2, XLPE, 250MVA underground cable line with fiber optic cable (24 Fibers) between Bani Hajer Super S/S and Al Jahhaniya 1 S/S into Al Jahhaniya 2 S/S. Approximate route length: 500m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 132kV GIS type in Al Jahhaniya 2 S/S and cable joints at diversion point. Refer to attached drawings. The circuits were installed by M/s Elsewedy under Phase 11 project (GTC/450C-2011).

•

Diversion (Loop in / Loop out) of existing single circuit 132kV, 1x2000mm2, XLPE, 250MVA underground cable line with fiber optic cable (24 Fibers) between Al Jahhaniya 1 S/S and Barzan Camp 1 S/S into Al Jahhaniya 2 S/S. Approximate route length: 500m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 132kV GIS type in Al Jahhaniya 2 S/S and cable joints at diversion point. Refer to attached drawings. The circuits were installed by M/s Elsewedy under Phase 11 project (GTC/450C-2011).

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All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Sequence of Construction Works •

Milestone A Complete Al Jahhaniya 2 substation, diversion of 1x132kV cable circuit between Al Jahhaniya 1 S/S and Barzan Camp 1 S/S into Al Jahhaniya 2 and related remote end works at Jahhaniya 1 S/S and Barzan Camp 1 S/S substations.

•

Milestone B Diversion of 1x132kV cable circuit between Bani Hajer Super S/S and Al Jahhaniya 1 into Al Jahhaniya 2 and related remote end works at Bani Hajer Super S/S and Al Jahhaniya 1 substations.

•

Milestone C Remote end works at Bani Hajer Super S/S and Barzan Camp-1 substations related to diversion of 1x132kV cable circuit between Bani Hajer Super S/S and Barzan Camp-1 into Al Jahhaniya-2 by cable contractor


REMOTE END WORKS AT BANI HAJER SUPER S/S 220/132/66/11kV Bani Hajer Super is an existing substation with 220kV GIS, 132kV GIS, 66kV GIS and 11kV Switchgear built by Alstom under Phase 8 Project. Bani Hajer Super will be connected to Al Jahhaniya 2 by diverting (LILO) the existing 1x132kV, Single Circuit, Bani Hajer Super – Barzan Camp 1 into Al Jahhaniya 2 and by diverting (LILO) the existing 1x132kV, Single Circuit, Bani Hajer Super – Al Jahhaniya 1 into Al Jahhaniya 2. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Bani Hajer Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Alstom under Phase 8 project to include changes to 2x132kV Cable feeders in the SCS including Gateway data

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mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. •

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing bays to be connected to Al Jahhaniya 2 substation are with Protection Relays/Equipments under GTC/144A/2006 Phase-8 project. •

The relay provided at Bani Hajer Super for Main-1 protection is Alstom make P545 and for Main-2 Protection is Siemens make 7SD5. The new Relays/Equipment to be installed at Al Jahhaniya 2 substation should match the protection at 132kV Bani Hajer Super Substation end.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT BARZAN CAMP 1 S/S 132/11kV Barzan Camp 1 is an existing substation with 132kV GIS and 11kV Switchgear built by L&T under Phase 10 Project. Barzan Camp 1 will be connected to Al Jahhaniya 2 by diverting (LILO) of the existing 1x132kV, Single Circuit, Bani Hajer Super – Barzan Camp 1 into Al Jahhaniya 2 and by diverting (LILO) of the existing 1x132kV, Single Circuit, Barzan Camp 1 – Al Jahhaniya 1 into Al Jahhaniya 2. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Barzan Camp 1 shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:

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SCS and Power Control Scope •

Required Modifications to SCS of Alstom make supplied by L&T under Phase 10 project to include changes to 2x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing bays to be connected to Al Jahhaniya 2 substation are with Protection Relays/Equipments under GTC/371A/2006 Phase-10 project. •

The relay provided at Barzan Camp 1 feeder connected to Bani Hajer Super for Main-1 protection is Alstom make P545 and for Main-2 Siemens make 7SD5 relays.

•

The relay provided at Barzan Camp 1 feeder connected to Al Jahhaniya 1 for Main1 protection is Alstom make P545 and for Main-2 Protection Siemens make 7SD52.

•

The new Relays/Equipment to be installed at Al Jahhaniya 2 substation should match the protection at 132kV Barzan Camp 1 Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT AL JAHHANIYA 1 S/S 132/11kV Al Jahhaniya 1 is a new substation being constructed by Siemens under Phase 11 Project. Al Jahhaniya 1 will be connected to Al Jahhaniya 2 by diversion (LILO) of the existing 1x132kV, Single Circuit, Bani Hajer Super – Al Jahhaniya 1 into Al Jahhaniya 2 and by diverting (LILO) of the existing 1x132kV, Single Circuit, Barzan Camp 1 – Al Jahhaniya 1 into Al Jahhaniya 2. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Al Jahhaniya 1 shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. GTC-735 SCOPE OF WORKS R0

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The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Siemens make supplied by Siemens under Phase 11 project to include changes to 2x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing bays to be connected to Al Jahhaniya 2 substation are with Protection Relays/Equipments under GTC/488C/2012 Phase-11 project.

3.3.2

•

The relay provided at Al Jahhaniya 1 feeder connected to Barzan Camp 1 for Main1 protection is Alstom make P545 and for Main-2 Siemens make 7SD5.

•

The new Relays/Equipment to be installed at Al Jahhaniya 2 substation should match the protection at 132kV Al Jahhaniya 1 Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

132/11KV IZGHAWA NORTH SUBSTATION 132/11kV Izghawa North substation is intended to cater power supply for the surrounding area. Izghawa North S/S will be connected to network by 132kV double cable circuits from

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Doha North Super S/S substation. The double circuit cable lines will be installed under separate Contract (GTC/736/2015, Package C5). The principal elements of new 132/11kV Izghawa North substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Four (4) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear.

•

11kV Switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s GTC-735 SCOPE OF WORKS R0

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•

Four (4) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of:

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- 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,

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132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

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•

11kV, 1x630mm2, XLPE, four single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT DOHA NORTH SUPER S/S 220/132/66/11kV Doha North Super is an existing substation built under Phase 4 project and upgraded with 132kV GIS by ABB under Phase 6 Project. Doha North Super substation will be connected to Izghawa North substation by 2x132kV, cable circuits. The cables will be installed under separate project (GTC/736/2015, Package C5). All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Doha North Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of ABB make supplied by ABB under Phase 4 project to include changes to 2x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Minor modification to TMMC/TDB/RTU to incorporate the changes on the 2x132kV Cable feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained.

•

Existing BCUs in 2 x 132kV bays utilized for connection towards Izghawa North substation shall be replaced with new BCUs. New BCUs shall be integrated with the existing SCS. All wiring modifications in the relay panel, testing and commissioning to make new BCU fully operational shall be Contractor’s responsibility.

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•

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Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing spare bays to be connected to Izghawa North substation are with Protection Relays/Equipments under Phase-4 project.

3.3.3

•

For those 132kV Cable feeders connected to Izghawa North S/S, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at Doha North substation to match the (new) protection at Izghawa North substation end.

•

Existing trip relays / TCS relays need to be replaced.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

132/33/11KV MESAIEED INDUSTRIAL-A SUBSTATION Existing 132/33/11kV Mesaieed Industrial-A substation shall be completely refurbished with the new equipment. Mesaieed Industrial-A S/S will remain connected to network by 132kV cable circuits to: • • • •

QASCO S/S, MPCL, MIB S/S and QVC & QAPCO S/S.

And by 33KV Cable Circuits to: • •

Container Berth Terminal-7 SS ( CBT-7), NGL SS and

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The principal elements of new 132/33/11kV Mesaieed Industrial-A substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. Shunt Reactor bays suitable for Double bus bar system with single pole Circuit breakers Note: Controlled switching device to be included and CB shall be capable for reactor switching - Alternatively, Two numbers of 132kV GIS Bay for Shunt Reactor without Switching Device Note: Contractor shall make study and confirm suitability of the proposed GIS Bay without controlled switching device. This alternative item will be applicable subject to such confirmation - Two (2) Nos. outgoing Transformer bays for 132/33kV Transformers; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Twelve (12) Nos. Cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 33kV, 2500A at 40˚C, 31.5kA / 1 sec, double bus bar GIS, consisting of the following: - Two (2) Nos. Bus section bay rated 2500A; - Two (2) Nos. Bus coupler bay rated 2500A; - Two (2) Nos. Incomers for 132/33kV Transformers rated 2500A; - Ten (10) Nos. Outgoing feeder bays rated 1250A (four (4) Nos. spare); - Space for four future bays, two on each side of the 33kV switchgear.

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A;

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- Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable. Note: 3 Nos. 132kV Cable feeder bays connected to bulk consumer (QASCO extension and QAPCO) and 3 Nos. 33kV Outgoing feeder bays connected to bulk consumer (NGL) shall be provided with Tariff metering CT and VTs cores.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/33kV, 60/75/100 MVA, Dyn1 ONAN/ONAF/OFAF cooling, +5% -15% on load taps in steps of 1.25%, 13% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 33kV Metallic Neutral Earthing Resistors 25.40 ohm @ 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/33kV 100MVA Power transformer.

•

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Two (2) Nos. 132kV, 15MVAr Shunt Reactors.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1600kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection

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SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for: - 132kV feeders connected to QASCO extension, MESAC (MPCL), MIB and QAPCO substations. - 33kV feeders connected to NGL and Container Terminal Berth substations •

Metering system: Tariff meters shall be provided on the 3 Nos. 132kV Cable feeder bays connected to bulk consumer (QASCO extension and QAPCO substation) and 3 Nos. 33kV Outgoing feeder bays connected to bulk consumer (NGL substation). Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.

•

For 33kV outgoing feeders Numerical relay with fibre optic interphase (for Fibre optic cable) and Numerical relay with fibre optic to pilot converter (for Pilot wire cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing

•

Any modifications at TMMC/TDB/RTU, for NCC/DCC communication of existing substation, required due to sequence of activities, shall be included in the scope of works.

•

Some of existing bulk consumer substation signals are hardwired to and configured in existing RTU at MIA (e.g. QAPCO, NGL, etc,) these signals shall be shifted to new SCS. Necessary gateway configuration will also be done for communication to NCC.

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Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - Online condition monitoring system for new 132/33kV, 100MVA Transformer; - Online condition monitoring system for 132kV, 15MVAr Shunt Reactor; - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.

- Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Integrated HMI shall include the existing TMS installed on the existing transformers;
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/33/11kV substation including building services, •

Removal of existing palisade fence and construction of new Boundary wall.

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132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers, Shunt Reactors & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Shunt Reactors, Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables:
132kV, 1x630 mm2, XLPE, 100MVA, double circuits, special bonded cable links, single point earthed with earth continuity conductor, the links between new 132/33kV transformers and new 132kV GIS switchgear laid in unfilled concrete troughs with all accessories Approx. route length: 100m.
33kV, 1x500 mm2, XLPE, 100MVA, double circuits, special bonded cable links, single point earthed with earth continuity conductor (four (4) cables per phase), the

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links between new 132/33kV transformers and new 33kV GIS switchgear laid in unfilled concrete troughs with all accessories Approx. route length : 50m
33kV, 1x500 mm2, XLPE, two singlecable links between 33kV NER and 132/33kV, 100 MVA Power Transformers. Approx. route length: 20 m.
132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bondedcable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.
11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.
11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.
132kV, 1x500mm2, XLPE, 15MVA, double circuit, solid bondedcable links between 132kV GIS and 132kV 15MVAr Shunt Reactor laid in unfilled concrete troughs with all accessories. Approx. route length: 150m.
11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.
11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.
Diversion of the existing 132kV, 1x1000mm2, XLPE, 174MVA, double circuits, from the existing 132kV GIS into new 132kV GIS, connected to MPCL S/S, laid in unfilled concrete troughs with all accessories, including one FO cable per circuit. Approx. route length: 150m. Existing cables are laid under separate project 2006 by M/s LC Cable.
Dismantling of the existing 132kV, 1x1600mm2, oil filled, 160MVA, double circuits, from the existing 132kV GIS into new 132kV GIS, connected to QASCO S/S, laid in unfilled concrete troughs with all accessories (with a necessary transition joint), including single core Pilot Wire cable. Approx. route length: 200m. Existing cables are laid under separate project. Decommissioning (dismantling of termination) and draining of oil of the remaining portion of cable is also a part of the Contractor’s Scope of Works as well as the laying and termination of control cables from the oil pressure monitoring system to the new MIA S/S control room.

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Diversion of the existing 132kV, 3Cx350mm2, oil filled, 71MVA, single circuit, from the existing 132kV GIS into new 132kV GIS, connected to QAPCO S/S, laid in unfilled concrete troughs with all accessories (with a necessary transition joint), including single core Pilot Wire cable. Approx. route length: 150m. Existing cables are laid under separate project. Necessary modification of oil pressure feeding system for the existing cable shall be done according to the oil profile details of the existing cables. Design and arrangement shall be submitted for approval (oil tank, alarm panel, oil pressure gauge manometer, oil pipe feeding, all test required for oil filled cable and concrete manhole for oil tank). Technical specification of the existing 3-core oil filled cable circuits will be provided after award of works. The correct phasing identification (R-Y-B) shall be done after cable is opened, isolated and earthed for spiking. All required works for laying of new XLPE cable shall include cutting and capping of redundant section of cable to prevent draining of oil to the ground. The exact location of cutting cable or diversion points and details design shall be responsibility of the Contractor and shall be covered by Contract prices. Decommissioning (dismantling of termination) and draining of oil of the remaining portion of cable is also a part of the Contractor’s Scope of Works as well as the laying and termination of control cables from the oil pressure monitoring system to the new MIA S/S control room.
Diversion of the existing 132kV, 3Cx350mm2, oil filled, 71MVA, single circuit, from the existing 132kV GIS into new 132kV GIS, connected to QVC S/S, laid in unfilled concrete troughs with all accessories (with a necessary transition joint), including single core Pilot Wire cable. Approx. route length: 150m. Existing cables are laid under separate project. Necessary modification of oil pressure feeding system for the existing cable shall be done according to the oil profile details of the existing cables. Design and arrangement shall be submitted for approval (oil tank, alarm panel, oil pressure gauge manometer, oil pipe feeding, all test required for oil filled cable and concrete manhole for oil tank). Technical specification of the existing 3-core oil filled cable circuits will be provided after award of works. The correct phasing identification (R-Y-B) shall be done after cable is opened, isolated and earthed for spiking. All required works for laying of new XLPE cable shall include cutting and capping of redundant section of cable to prevent draining of oil to the ground. The exact location of cutting cable or diversion points and details design shall be responsibility of the Contractor and shall be covered by Contract prices. Decommissioning (dismantling of termination) and draining of oil of the remaining portion of cable is also a part of the Contractor’s Scope of Works as well as the laying and termination of control cables from the oil pressure monitoring system to the new MIA S/S control room.

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Diversion of the existing 132kV, 1x1200mm2, XLPE, 209MVA, double circuits, from the existing 132kV GIS into new 132kV GIS, connected to MIB S/S, laid in unfilled concrete troughs with all accessories, including one FO cable per circuit. Approx. route length: 150m. Existing cables are laid under Kahramaa project (1995) by M/s Alcatel Cable.
Diversion of the existing 132kV, 1x1200mm2, XLPE, 209MVA, single circuit, from the existing 132kV GIS into new 132kV GIS, connected to MIB S/S, laid in unfilled concrete troughs with all accessories, including one FO cable. Approx. route length: 150m. Existing cables are laid under Kahramaa project (2008) by M/s Saudi Cable.
Diversion of the existing 132kV, 1x1200mm2, XLPE, 160MVA, single circuit, from the existing 132kV GIS into new 132kV GIS, connected to QASCO S/S, laid in unfilled concrete troughs with all accessories, including one FO cable. Approx. route length: 150m. Existing cables are laid under Kahramaa project (1995) by M/s Alcatel Cable.
Dismantling of oil filled three core cable to the 132kV, 15MVAr Shunt Reactors.
Two numbers each of existing 132kV and 33kV cables are to be re-arranged to make available free space for new substation. If more cables are found upon survey, contractor shall carry out diversion of such cables.
Diversion of the existing 33kV, 1x400mm2, 21MVA, double circuits, from the existing 33kV GIS into new 33kV GIS, connected to CTB7 S/S, laid in unfilled concrete troughs with all accessories, including one FO cable per circuit. Approx. route length: 150m.Existing cables are laid under separate project.
Diversion of the existing 33kV, XLPE, 2x3Cx240mm2, 18MVA, single circuit, from the existing 33kV GIS into new 33kV GIS, connected to NGL S/S, laid in unfilled concrete troughs with all accessories,including single core Pilot Wire cable. Approx. route length: 150m.Existing cables are laid under separate project.
Diversion of the existing 33kV, oil filled, 2x3Cx240mm2, 12.5MVA, double circuit, from the existing 33kV GIS into new 33kV GIS, connected to NGL S/S, laid in unfilled concrete troughs with all accessories (with a necessary transition joint),including single core Pilot Wire cable. Approx. route length: 150m. Existing cables are laid under separate project. Necessary modification of oil pressure feeding system for the existing cable shall be done according to the oil profile details of the existing cables. Design and arrangement shall be submitted for approval (oil tank, alarm panel, oil pressure gauge manometer, oil pipe feeding, all test required for oil filled cable and concrete manhole for oil tank). Technical specification of the existing 3-core oil filled cable circuits will be provided after award of works. The correct phasing identification (R-Y-B) shall be done after cable is opened, isolated and earthed for spiking. All required works for laying of new XLPE cable shall include cutting and capping of redundant section of cable to prevent draining of oil to the ground. The exact location of cutting cable or diversion points and

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details design shall be responsibility of the Contractor and shall be covered by Contract prices. Decommissioning (dismantling of termination) and draining of oil of the remaining portion of cable is also a part of the Contractor’s Scope of Works as well as the laying and termination of control cables from the oil pressure monitoring system to the new MIA S/S control room.
Diversion of the existing DTS FO cables of approximately 1 x 100m related to diversion of the existing 132kV cables to MIB from diversion point to 132KV GIS, including splicing with existing DTS Cable. Re-commissioning of existing DTS Unit of SENSA make, model DTS 800 M8-6 (located at Mesaieed Industrial B).
Diversion of the existing DTS FO cables of approximately 2 x 100m related to diversion of the existing 132kV cables to MPCL from diversion point to 132KV GIS, including splicing with existing DTS Cable. Re-commissioning of existing DTS Unit of SENSA make, model DTS 800 S15-4(located at Mesaieed Industrial-A).
Sequence of Construction Works •

Milestone A Complete Substation, divert one cable from MIB from the existing 132kV GIS to the new 132kV GIS, divert one cable from MPCL from the existing 132kV GIS to the new 132kV GIS and the remote end works at MIB and MPCL.

•

Milestone B Divert the other cables to the new 132kV GIS and the corresponding remote end works.


REMOTE END WORKS QASCO EXTENSION S/S Existing 132/66/1kV QASCO Transformer feeder substation built under phase 4 projects has been upgraded with new 220/66/11kV substation constructed by Siemens. Existing 2x132kV oil filled cables connected to the 150MVA 132/66kV transformers will be no longer connected to QASCO SS. Whereas, existing 1x132kV, 160MVA, XLPE feeder connected to the 132/66kV, 160MVA transformer of QASCO extension substation will remain in service. All required modifications, End to End test, testing and commissioning and putting into service of the one circuit shall be carried out under the scope of this project. For 1x132kV Cable transformer feeder bay connected to bulk consumer QASCO extension, all the requirements as per Kahramaa standard specification for the bulk consumers shall apply. Contractor is required to obtain all the necessary permits to work inside the bulk consumer premises. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing GIS bay, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional

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alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays. •

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Minor modification to TMMC/TDB/RTU to incorporate the changes on the 132kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection 1x132kV existing cable transformer bays to be connected to Mesaieed Industrial-A substation is with Protection Relays/Equipment’s as per the earlier Kahramaa projects. •

For the 132kV Cable transformer feeder connected to Mesaieed Industrial-A S/S, complete functional protection system as per standard specification shall be provided.

•

The new relays/equipment shall be installed at QASCO Extension substation to match the (new) protection at MIA substation end.

•

Existing trip relays / TCS relays need to be replaced.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT MPCL S/S Mesaieed ‘A’ IPP is an existing substation with Gas insulated switchgears constructed by Mesaieed Power Company Ltd. MPCL is connected to Mesaieed Industrial-A by 2x132kV cable circuits. These cable circuits will be diverted to the new 132kV GIS at Mesaieed Industrial-A. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: GTC-735 SCOPE OF WORKS R0

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•

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Siemens make to include changes to 2x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing bays to be connected to Mesaieed Industrial-A substation are with Protection Relays/Equipments under separate project. •

For those 132kV Cable feeders connected to MPCL S/S, complete functional protection system as per standard specification shall be provided. The bays are fully equipped with protection relays/equipment.

•

The relay provided at MESAC (MPCL) substation for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is ABB make RED670 relays. The new Relays/Equipment to be installed at Mesaieed Industrial-A substation should match the protection at MESAC (MPCL) Substation end (supplied under Phase-9 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

•

All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope


REMOTE END WORKS QAPCO & QVC S/S

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QAPCO & QVC will remain connected to Mesaieed Industrial-A by 132kV, Double Circuit, Oil filled cables QAPCO – Mesaieed Industrial A and QVC- MIA, associated with pilot wire. All modifications, End to End test, testing and commissioning and putting into service of two circuits required shall be carried out under the scope of this project. For 2x132kV Cable transformer feeder bay connected at bulk consumer QAPCO, all the requirements as per Kahramaa standard specification for the bulk consumers shall apply. Contractor is required to obtain all the necessary permissions to work inside the bulk consumer premises. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of One number of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Minor modification to TMMC/TDB/RTU to incorporate the changes on the 132kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing bays to be connected to Mesaieed Industrial-A substation is with Protection Relays/Equipments as per earlier Kahramaa specification. •

For the 132kV Cable transformer feeders connected to Mesaieed Industrial-A S/S, complete functional protection system as per standard specification shall be provided, for cable with pliot wire and associated protection.

•

The new relays/equipment shall be installed at QAPCO substation to match the (new) protection at MIA substation end.

•

Existing trip relays / TCS relays need to be replaced.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

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•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS MIB S/S 220/132/33kV Mesaieed Industrial B is an existing 220/132/33kV substation built under Phase 4 project. Mesaieed Industrial B will remain connected to Mesaieed Industrial-A by 132kV, Triple Circuit, Mesaieed Industrial B – Mesaieed Industrial-A. All required modifications, End to End test, testing and commissioning and putting into service of the three circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of three numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required modifications in the existing SCS of ABB make to include changes related to 132kV feeders.

•

Minor modification to TMMC/TDB/RTU to incorporate the changes on the 3x132kV Cable feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained.

•

Existing BCUs in 3 x 132kV bays utilized for connection towards MIA substation shall be replaced with new BCUs. New BCUs shall be integrated with the existing SCS. All wiring modifications in the relay panel, testing and commissioning to make new BCU fully operational shall be Contractor’s responsibility.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and TMMC/TDB/RTU.


Protection Three 3x132kV existing bays to be connected to Mesaieed Industrial-A substation is with Protection Relays/Equipments as per earlier Kahramaa specifications.

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•

For those 3x132kV Cable feeders connected to Mesaieed Industrial-A S/S, complete functional protection system as per standard specification shall be provided.

•

MIB – MIA 132kV Cable Circuit#1 and Circuit#2, the bays are fully equipped with one main protection relays/equipments supplied under Phase-4 project. The new relays/equipment shall be installed at MIB substation to match the (new) protection at MIA substation end.

•

MIB – MIA 132kV Cable Circuit#3, the bays are fully equipped with protection relays/equipments supplied under Phase-7 project. The relay provided at MIB substation for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is ABB make RED670 relays. The 87C relays are to be replaced to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. Existing trip relays / TCS relays need to be replaced. The new Relays/Equipment to be installed at Mesaieed Industrial-A substation should match the protection upgraded at MIB Substation end, circuit-3 (supplied under Phase-7 project).

•

Existing trip relays / TCS relays need to be replaced in all three MIB – MIA 132kV Cable feeders.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS NGL S/S 33/11kV NGL is an existing 33/11kV substation with 33kV and 11kV Switchgear built under separate project. NGL will remain connected to Mesaieed Industrial-A by 33kV, Triple Circuit, NGL – Mesaieed Industrial-A associated with pilot wires. All required modifications, End to End test, testing and commissioning and putting into service of the three circuits shall be carried out under the scope of this project. For 2x33kV Cable feeder bay connected to bulk consumer NGL, all the requirements as per Kahramaa standard specification for the bulk consumers shall apply. Contractor is required to obtain all the necessary permissions to work inside the bulk consumer premises. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of three numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of switchgear name

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plates and any required works including, wiring, testing & complete recommissioning of the above switchgear bays. •

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Minor modification to TMMC/TDB/RTU to incorporate the changes on the 33kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Three 3x33kV existing bays to be connected to Mesaieed Industrial-A substation is with Protection Relays/Equipments as per the earlier Kahramaa specification. •

For the 33kV Cable feeder connected to Mesaieed Industrial-A S/S, complete functional protection system as per standard specification shall be provided for cable with pliot wire and associated protection. For 33kV outgoing feeders Numerical relay with fibre optic to pilot converter (for Pilot wire cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

Existing trip relays / TCS relays need to be replaced.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS CTB7 (Container Terminal Berth 7) S/S 33kV CTB7 is an existing substation with 33kV Switchgear built under separate project. CTB7 will remain connected to Mesaieed Industrial-A by 33kV, Double Circuit, CTB7 – Mesaieed Industrial-A. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. For 2x33kV Cable feeder bay connected to bulk consumer CTB7, all the requirements as per KM standard specification for the bulk consumers shall apply.

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Contractor is required to obtain all the necessary permissions to work inside the bulk consumer premises The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of ABB make to include changes to 2x33kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x33kV existing bays to be connected to Mesaieed Industrial-A substation is with Protection Relays/Equipments as per the earlier Kahramaa specification. •

For the 33kV Cable feeder connected to Mesaieed Industrial-A S/S, complete functional protection system as per standard specification shall be provided.

•

The relay provided at CTB7 substation for Main protection is ABB make RED670 relay and Back O/C ABB make REF615 relay. The new Relays/Equipment to be installed at Mesaieed Industrial-A substation should match the protection at CTB7 substation end (supplied under bulk consumer project).

•

Tairff metering provided at Bulk consumer end CTB7 shall be remain connected as per present arrangement.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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132/11KV WAKRAH 3 SUBSTATION 132/11kV Wakrah 3 substation is intended to cater power supply for Wakrah area. Wakrah 3 S/S will be connected to network by single 132kV cable circuit from RAF South and from 132kV FACILITY D (QEZ-3) substations. The cables will be installed under separate Contract (GTC/736/2015, Package C5). In addition, single 132kV cable circuit from 132kV FACILITY D (QEZ-3) to Wakrah North substations shall be installed under separate Contract (GTC/736/2015, Package C5). The principal elements of new 132/11kV Wakrah 3 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

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•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to RAF South and 132kV FACILITY D (QEZ-3) substations. The new relays to be installed at 132/11kV Wakrah 3 substation shall match the protection at RAF South and 132kV FACILITY D (QEZ-3) substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM);

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- 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

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FM200 System for the control & relay room, LVAC/DC Room.

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Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT 132kV FACILITY D (QEZ-3) S/S FACILITY D is a new generation project including 400kV, 220kV and 132kV Gas insulated switchgear which will be constructed under IWPP project. The 400kV GIS at FACILITY D Substation shall be owned, operated and maintained by the IWPP. 220kV and 132kV GIS at FACILITY D being constructed under IWPP project shall be owned, operated and maintained by Kahramaa

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Facility D 132kV GIS (QEZ-3) will be connected by 132kV single circuit cables to Wakrah 3 and Wakrah North substations. The cables will be installed under separate contract (GTC/736/2015, Package-C5). All required modifications, End to End test, testing and commissioning and putting into service of two circuits shall be carried out under the scope of this project. Modification works at 132kV FACILITY D (QEZ-3) shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under IWPP project to include changes to 2x132kV Cable feeder (Wakra North and Wakra-3) in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing spare bay to be connected to Wakrah 3 Substation and 1x132kV existing spare bay to be connected to Wakrah North Substation are with Protection Relays/Equipment’s under IWPP Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Wakrah 3 and Wakrah North substations should match the protection at 132kV FACILITY D (QEZ-3) Substation end (supplied under IWPP project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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REMOTE END WORKS AT RAF SOUTH S/S 132/11kV RAF South is a new Substation, being constructed under Phase 12 Project. Wakrah 3 shall be connected to RAF South by single circuit 132kV Cable Line. All required modifications, End to End test, testing and commissioning and putting into service of one circuit shall be carried out under the scope of this project. Modification works at RAF South shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to Wakrah 3 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of this circuit is included in the Present Scope. The new Relays/Equipment to be installed at Wakrah 3 substation should match the protection at 132kV RAF South Substation end (supplied under Phase12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


REMOTE END WORKS AT WAKRAH NORTH S/S

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132/11kV Wakrah North is a new Substation, being constructed under Phase 12 Project. Wakrah North shall be connected to 132kV FACILITY D by single circuit 132kV Cable Line. All required modifications, End to End test, testing and commissioning and putting into service of one circuit shall be carried out under the scope of this project. Modification works at Wakrah North shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to 132kV FACILITY D (QEZ-3) Substation are with Protection Relays/Equipments under Phase-12 Project.

•

The new Relays/Equipment to be installed at Wakrah North substation should match the protection at 132kV FACILITY D (QEZ-3) Substation end (supplied under IWPP project).

•

If there is mismatch between the Main Relays provided at Wakrah North substation under Phase-12 project, to the relays already provided in 132kV FACILITY D (QEZ-3) Substation, Swapping or changing with new relays at Wakrah North substation is included in the Present Scope.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of this circuit is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

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Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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PACKAGE S-4

3.4

3.4.1

66/11KV NEW ASSIRI SUBSTATION (REPLACEMENT) 66/11kV New Assiri substation is intended to replace the existing 66/11kV transformer feeder substation. The substation is to be built at a new plot and will be connected to network by diverting the existing cable circuits from Ali Bin Abu Talib S/S. The principal elements of new 66/11kV New Assiri substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays (four (4) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

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•

Space for two (2) future capacitor banks and space for two (2) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Ali Bin Abu Talib substation.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
Civil works •

All civil works related to new 66/11kV substation including building services, Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities.


66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

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•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits from Ali Bin Abu Talib substation shall be diverted from the existing GIS into the new GIS at New Assiri substation under the present Scope of Work. Refer to attached drawing no. TRANS-14-2015.

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The substation Contractor should make all necessary arrangements to connect cable circuits at New Assiri substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion of the existing 66kV, 1x240mm2, XLPE, 25MVA, double circuit, from the existing 66/11kV Transformer into new 66kV GIS, connected to Ali Bin Abu Talib S/S, laid in unfilled concrete troughs with all accessories. Approx. route length: 500m.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Sequence of Construction Works •

Milestone A Complete Substation, divert the existing 66kV cable from Ali Bin Abu Talib S/S into new 66kV GIS and the remote end works at Ali Bin Abu Talib S/Ss.

•

Milestone B Divert the second cable from Ali Bin Abu Talib S/S into the new 66kV GIS and the corresponding remote end works.


REMOTE END WORKS AT ALI BIN ABU TALIB S/S 66/11kV Ali Bin Abu Talib is an existing substation with 66kV GIS and 11kV Switchgear built by Siemens under Phase 5 Project. Ali Bin Abu Talib will be connected to New Assiri by diverting the existing 2x66kV, Double Circuit, Ali Bin Abu Talib – New Assiri cables into new 66kV GIS. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Modification of existing bays connected to New Assiri SS by installing new VTs

•

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Existing BCUs in 66kV bays may not have necessary spare BI/BO to connect new signals as per latest specification requirements. Hence Contractor shall install additional BCU or other suitable device to transfer all the required signals to SCS/NCC as per specification, including new VT connection and additional spare BI/BO.

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•

Required Modifications to SCS supplied by Siemens under Phase 5 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to New Assiri substation are with Protection Relays/Equipments under Phase-5 project.

3.4.2

•

VTs are not available in 66kV GIS bays. New GIS 66kV VT shall be provided at Ali Bin Abu Talib substation. The Contractor shall be fully responsible for all associated works, Synchro. Functionality and extension of Local Sync. Scheme, interlocks and required interfaces.

•

For those 66kV Cable feeders connected to New Assiri substation, complete functional protection system as per standard specification shall be provided. Existing main relay and trip relays / TCS relays need to be replaced with new one. The new Relays/Equipment to be installed at Ali Bin Abu Talib substation should match the new protection at New Assiri substation.

•

Existing Trip relays / TCS relays need to be replaced with new one.

•

All the required modifications in existing bays with provision of additional auxiliary relays, BCU panels wiring etc. to meet the the new VT provisions and Phase-13 protection requirement shall be responsibility of contractor.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

66/11KV SALWA ROAD SUBSTATION (REPLACEMENT) 66/11kV Salwa Road substation is intended to replace the existing 66/11kV transformer feeder substation. The substation is to be built at a new plot and will be connected to network by diverting the existing cable circuits from Ali Bin Abu Talib S/S. The principal elements of new 66/11kV Salwa Road substation shall be as follows:

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Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for two (2) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the

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Transformer is to be justified by calculation note which shall be subject to approval.
Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Ali Bin Abu Talib substation.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. TECHNICAL AFFAIRS Electricity Projects Dept.

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•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
Civil works •

All civil works related to new 66/11kV substation including building services, Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities.


66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the

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substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders. •

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits from Ali Bin Abu Talib substation shall be diverted from the existing Transformers into the new GIS at Salwa Road substation under the present Scope of Work. Refer to attached drawing no. TRANS-107-2014. The substation Contractor should make all necessary arrangements to connect cable circuits at Salwa Road substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion of the existing 66kV, 1x240mm2, XLPE, 25MVA, double circuit, from the existing 66/11kV Transformer into new 66kV GIS, connected to Ali Bin Abu

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Talib S/S, laid in unfilled concrete troughs with all accessories. Approx. route length: 600m. •

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Sequence of Construction Works •

Milestone A Complete Substation, divert the existing 66kV cable from Ali Bin Abu Talib S/S into new 66kV GIS and the remote end works at Ali Bin Abu Talib S/Ss.

•

Milestone B Divert the second cable from Ali Bin Abu Talib S/S into the new 66kV GIS and the corresponding remote end works.


REMOTE END WORKS AT ALI BIN ABU TALIB S/S 66/11kV Ali Bin Abu Talib is an existing substation with 66kV GIS and 11kV Switchgear built by Siemens under Phase 5 Project. Ali Bin Abu Talib will be connected to Salwa Road by diverting the existing 2x66kV, Double Circuit, Ali Bin Abu Talib – Salwa Road cables into new 66kV GIS. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Modification of existing bays connected to New Assiri SS by installing new VTs

•

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Existing BCUs in 66kV bays may not have necessary spare BI/BO to connect new signals as per latest specification requirements. Hence Contractor shall install additional BCU or other suitable device to transfer all the required signals to SCS/NCC as per specification, including new VT connection and additional spare BI/BO.

•

Required Modifications to SCS supplied by Siemens under Phase 5 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data

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mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. •

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Salwa Road substation are with Protection Relays/Equipments under Phase-5 project.

3.4.3

•

For those 66kV Cable feeders connected to Salwa Road substation, complete functional protection system as per standard specification shall be provided. The new Relays/Equipment to be installed at Ali Bin Abu Talib substation should match the new protection at New Assiri substation.

•

VTs are not available in 66kV GIS bays. New GIS 66kV VT shall be provided at Ali Bin Abu Talib substation. The Contractor shall be fully responsible for all associated works, Synchro. Functionality and extension of Local Sync. Scheme, interlocks and required interfaces.

•

Existing Trip relays / TCS relays need to be replaced with new one.

•

All the required modifications in existing bays with provision of additional auxiliary relays, BCU panels wiring etc. to meet the new VT provisions and Phase-13 protection requirement shall be responsibility of contractor.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

66/11KV BIN MAHMOUD NORTH SUBSTATION 66/11kV Bin Mahmoud North is a new substation intended to cater power supply to the surrounding area. Bin Mahmoud North S/S will be connected to network by looping in looping out (LILO) existing 66kV cable circuit from Al Sadd Super – Musherib. The principal elements of new 66/11kV Bin Mahmoud North substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear

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Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for four (4) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, load for two future 66/11kV Transformers & for future 11kV

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switchgear-B with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.
Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. All the necessary coordination with Al Sadd Super Contractor for the compatibility of the relay and equipment (in line with remote end protection scope of works) shall be provided for feeders connected to Al Sadd Super substation. The new relays to be installed at 66/11kV Bin Mahmoud North substation shall match the protection at Al Sadd Super substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

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•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories, sized for the 66/11kV substation including future 11kV (B) switchgear and future 2 x 66/11kV Transformers.
Security Management System according to specification enclosed in section 3.3.15.
Civil works: •

All civil works related to new 66/11kV substation including building services,

•

The substation layout shall have space for future 11kV (B) switchgear and space for future 2 x 66/11kV Transformers.

•

Control & relay room building shall be sized to accommodate the requirements of the above future equipment such as control and relay panels, LV Service equipment etc.


66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

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•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing 66kV double cable circuit Al Sadd Super – Musherib shall be diverted into the Bin Mahmoud North substation under the present Scope of Work: The substation Contractor should make all necessary arrangements to connect cable circuits at Bin Mahmoud North substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion.

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•

Diversion (Loop in / Loop out) of existing 66kV, 1x2000mm2, XLPE, 120MVA underground cable line with fiber optic cable (24 Fibers) between Al Sadd Super and Musherib S/S into Bin Mahmoud North S/S. Approximate route length: 500m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 66kV GIS type in Bin Mahmoud North S/S and cable joints at diversion point. Refer to attached drawing no. TRANS-13-2015.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Sequence of Construction Works •

Milestone A Complete Substation, LILO of the one existing 66kV cable circuit Al Sadd Super and Musherib into Bin Mahmoud North S/S and the remote end works at Al Sadd Super S/Ss.

•

Milestone B LILO of the second existing 66kV cable circuit Al Sadd Super and Musherib into Bin Mahmoud North S/S and the corresponding remote end works.


REMOTE END WORKS AT AL SADD SUPER SUBSTATION: AL-SADD SUPER is a 220/66/11kV underground substation which will be constructed under a separate project. Bin Mahmoud North substation shall be connected to AL-SADD SUPER by 2x66kV Double Cable Line. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at AL-SADD SUPER shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control:

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•

Minor Modifications to SCS to be supplied under separate project to include changes to 2x66kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection:

3.4.4

•

2x66kV existing bays to be connected to Bin Mahmoud North are with Protection Relays/Equipments under separate Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope. The new Relays/Equipment to be installed at Bin Mahmoud North substation should match the protection at 66kV AL-SADD SUPER Substation end (supplied under separate contract).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

66/11KV MUSHERIB SUBSTATION (REFURBISHMENT) 66/11kV Musherib transformer feeder substation is intended to replace the existing 66/11kV substation. Musherib S/S will remain connected to network by diverting the existing cable circuits from Al Sadd Super S/S to the new 66/11kV transformers. The principal elements of new 66/11kV Musherib substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers;

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- Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for two (2) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. All the necessary coordination with Al Sadd Super Contractor for the compatibility of the relay and equipment (in line with remote end protection scope of works) shall be provided for feeders connected to Al Sadd Super substation. The new relays to be installed at 66/11kV Musherib substation shall match the protection at Al Sadd Super substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for

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11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing

•

Any modifications at TMMC/TDB/RTU, for NCC/DCC communication of existing substation, required due to sequence of activities, shall be included in the scope of works.


Online Monitoring System •

Condition monitoring system comprising of: - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 66/11kV substation including building services,
Fire Pump Room Cranes
Air-conditioning and ventilation systems to cover the Switchgear and Control & Relay buildings and all other buildings.

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Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Fire hydrant and ring main piping (all around the substation buildings perimeter).

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the Switchgear buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

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11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits from Al Sadd Super substation shall be diverted from the existing transformers into the new transformers at Musherib substation under the present Scope of Work. Refer to attached drawing no. TRANS-64-2013. The substation Contractor shall make all necessary arrangements to divert the above cable circuits at Musherib substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion of the existing 66kV, 1x2000mm2, XLPE, 120MVA, double circuit, from the existing 66/11kV Transformer into new 66/11kV Transformer, connected to Al Sadd Super S/S, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Dismantling/Demolition Works: De-commissioning and dismantling of the existing 66/11kV Transformers, 11kV Switchgears and all associated equipment, existing palisade fence etc. and handover all the dismantled materials to Kahramaa stores or approved location. The existing buildings and unused structures shall be demolished and all the debris, waste material, garbage etc. shall be removed from the substation site and shifted to Municipality designated/ approved location.

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PACKAGE – S5

3.5

3.5.1

66/11KV MURRAH SOUTH SUBSTATION 66/11kV Murrah South is a new substation intended to cater power supply to the surrounding area. Murrah South S/S will be connected to network by 66kV double cable circuits, under the separate Contract (GTC/736/2015, Package C6): • •

from Doha Industrial B (DIB) S/S and from Doha Industrial Super (DIS) S/S.

The principal elements of new 66/11kV Murrah South substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Four (4) Nos. outgoing Transformer bays for 66/11kV Transformers; - Eight (8) Nos. Cable feeder bays (four (4) spare); - Space for four future bays, two on each side of the switchgear;

•

Establish two 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

Switchgear A: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear.

•

Switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A;

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- Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to DIB and DIS substations. The new relays to be installed at 66/11kV Murrah South substation shall match the protection at DIB and DIS substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.

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SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 66/11kV substation including building services,
66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System

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•

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

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11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT DOHA INDUSTRIAL B S/S 66/11kV Doha Industrial B is an existing substation upgraded under Phase 11 project by M/s L&T with 66kV GIS of Siemens make and 11kV Switchgear. Doha Industrial B will be connected to Murrah South by new 2x66kV, Double Circuit cable lines. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Doha Industrial B shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS (B30 and B40) bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Siemens make supplied by L&T under Phase 11 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing spare (B30 and B40) bays to be connected to Murrah South substation are with Protection Relays/Equipments under GTC/488D/2006 Phase-11 project. •

The relay provided at Doha Industrial B for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is Alstom make P545. The new Relays/Equipment to be installed at Murrah South substation should match the protection at 66kV Doha Industrial B Substation end (supplied under Phase-11 project).

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•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT DOHA INDUSTRIAL SUPER S/S 220/132/66/11kV Doha Industrial Super is an existing substation built under Phase 10 project by M/s L&T with 220kV GIS, 132kV GIS, 66kV GIS of Hyosung make and 11kV Switchgear. Doha Industrial Super will be connected to Murrah South by new 2x66kV, Double Circuit cable lines. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Doha Industrial Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Alstom make supplied by L&T under Phase 10 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Murrah South substation are with Protection Relays/Equipments under GTC/488D/2006 Phase-11 project.

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•

The relay provided at Doha Industrial Super for Main-1 protection is Alstom make P545 and for Main-2 Protection is Siemens make 7SD5. The new Relays/Equipment to be installed at Murrah South substation should match the protection at 66kV Doha Industrial Super Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

66/11KV UMM AL SENEEM 2 SUBSTATION 66/11kV Umm Al Seneem 2 is a new substation intended to cater power supply to the surrounding area. Umm Al Seneem 2S/S will be connected to network by looping in looping out (LILO) existing 66kV cable double circuit Vegetable Market – Ain Khalid North. The principal elements of new 66/11kV Umm Al Seneem 2 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers;

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- Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Ain Khalid North and Vegetable Market substation. The new relays to be installed at 66/11kV Umm Al Seneem 2 substation shall match the protection at Ain Khalid North and Vegetable Market substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for

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11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 66/11kV substation including building services,
66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.

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Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing 66kV double circuit cable lines between Vegetable Market and Ain Khalid North substations shall be diverted (LILO) into the Umm Al Seneem 2 substation under the present Scope of Work: The substation Contractor shall make all necessary arrangements to divert the cable circuits to Umm Al Seneem 2 substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion (Loop in / Loop out) of existing double circuit 66kV, 1x500mm2, XLPE, 40MVA underground cable line with fiber optic cable (24 Fibers) between Vegetable Market and Ain Khalid North S/S into Umm Al Seneem 2 S/S. Approximate route length: 500m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 66kV GIS type in Umm Al Seneem 2 S/S and cable joints at diversion point. Refer to attached drawing no. TRANS-102-2014.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Sequence of Construction Works •

Milestone A Complete Substation, LILO of the one existing 66kV cable line Vegetable Market and Ain Khalid North into Umm Al Seneem 2 S/S and the remote end works at Vegetable Market and Ain Khalid North S/Ss.

•

Milestone B LILO of the second existing 66kV cable line Vegetable Market and Ain Khalid North into Umm Al Seneem 2 S/S and the remote end works at Vegetable Market and Ain Khalid North S/Ss.


REMOTE END WORKS AT AIN KHALID NORTH S/S

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66/11kV Ain Khalid North is an existing substation built under Phase 10 project by M/s Hyosung. Ain Khalid North will be connected to Umm Al Seneem 2 by diversion (LILO) of the existing 2x66kV cables between Ain Khalid North & Vegetable Market substations. All modifications, End to End test, testing and commissioning and putting into service of these two circuits shall be carried out under the scope of this project. Modification works at Ain Khalid North shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Siemens make under Phase 10 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Umm Al Seneem 2 substation are with Protection Relays/Equipments under Phase-10 project. •

The relay provided at Ain Khalid North for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Umm Al Seneem 2 substation should match the protection at 66kV Ain Khalid North Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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REMOTE END WORKS AT VEGETABLE MARKET S/S 66/11kV Vegetable Market is an existing substation with 66kV GIS and 11kV Switchgear built by Siemens under Phase 5 Project. Vegetable Market will be connected to Umm Al Seneem 2 by diversion (LILO) of the existing 2x66kV cables between Ain Khalid North & Vegetable Market substations.. All modifications, End to End test, testing and commissioning and putting into service of these two circuits shall be carried out under the scope of this project The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Existing BCUs in 66kV bays may not have necessary spare BI/BO to connect new signals as per latest specification requirements. Hence Contractor shall install additional BCU or other suitable device to transfer all the required signals to SCS/NCC as per specification, including new VT connection and additional spare BI/BO.

•

Required Modifications to SCS supplied by Siemens under Phase 5 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Umm Al Seneem 2 substation are with Protection Relays/Equipments upgraded under Phase-10 project. •

The relay provided at Vegetable Market Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Umm Al Seneem 2 substation should match the protection at 66kV Vegetable Market Substation end (supplied under Phase-10 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

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3.5.3

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Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

66/11KV AL WAAB SUBSTATION (UPGRADE) 66/11kV Al Waab substation is an existing transformer feeder substation built by M/s Siemens under Phase 6 project. Existing substation shall be upgraded by addition of the new 66kV GIS, two 66/11kV transformers and the 11kV switchgear-B. Existing 40MVA transformers are delta-star type with earthing transformers on LV side. Al Waab will be connected to the network by loop-in/loop-out (LILO) of the existing 2x66kV cable circuits between Al Waab Super and Mehairja Super substations. It shall also remain connected to Vegetable Market S/S by diverting the 2x66kV cables from the existing transformers to the new 66kV GIS at Al Waab S/S. The principal elements of the upgraded 66/11kV Al Waab substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Four (4) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays; - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: - Existing switchgear shall be named Switchgear A and connected to the new 66kVGIS; - Re-testing and re-commissioning of existing transformers and associated GIS/switchgear bays

•

11kV Switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A;

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- Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the existing substation as well for the new equipment, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Vegetable Market, Al Waab Super and Mehairah Super substation. However, the following specific requirements shall be considered: Protection at Al Waab substation for 2x66kV cable feeders to be connected to Al Waab Super substation shall be provided to be compatible with already installed relays at Al Waab Super substation. End to End test, Testing and commissioning and putting into service of these two circuits shall be substation Contractor's responsibility.

•

Protection at Al Waab substation for 2x66kV Cable Feeders to be connected to Mehairja Super substation shall be provided to be compatible with already installed relays at Mehairja Super substation. End to End test, Testing and commissioning and putting into service of these two circuits shall be substation Contractor's responsibility.

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•

Protection at Al Waab substation for 2x66kV cable feeders to be connected to Vegetable Market substation shall be provided to be compatible with already installed relays at Vegetable Market substation. End to End test, Testing and commissioning and putting into service of these two circuits shall be substation Contractor's responsibility.

•

New (HV side) protection for existing 66/11kV Power Transformer shall be provided based on Phase 13 specifications, installed in new control room. All modification on the 66kV and 11V sides of the 66/11kV Power Transformer protection shall be done to make it compatible with 66kV side protection. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between 66kV HV side (new control building) and existing 11kV LV switchgears and protection.

•

Presently, existing panels (B11 & B21), provided with transformer (HV) side protection and line differential (F87C and F87C+T) protection shall be dismantled and returned to Kahramaa store as per standard procedure. Transformer mechanical protections relays are provided in the 66kV HV panels as per old protection philosophy. However, new provision of transformer mechanical protections relays based on new 66/11kV, 40MVA transformer protection philosophy shall be contractor’s responsibility. Existing HV side panels shall be converted to LV side protection panels. Alternatively, new LV protection panels can be provided and exact details shall be decided during detail engineering. Contractor shall ensure that the relays provided in new 66kV Transformer HV Bays protection panels and those installed in existing 11kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the 66/11kV Transformers protection.

•

AVR panels with AVR relays are provided for existing two number 66/11kV Transformers, located in existing control room. Existing AVR equipment shall be tested and its proper functioning shall be ensured by the Contractor; however, any AVR equipment modifications, testing and commissioning for AVR scheme due to connection to new 66kV GIS shall be Contractor's responsibility.

•

All other protections shall be provided as per the standard specification.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 66kV control room to complete the necessary connection and end-to-end test of protection for the said links (New control room in Al Waab to Vegetable Market).

•

Existing 11kV Switchgear shall be marked as 11kV Switchgear A with appropriate name plates and indications in SCS/NCC. Any required changes to existing protection relay settings, testing and re-commissioning of existing 40MVA transformer, 11kV Switchgear and earthing transformer shall be the responsibility of the Contractor.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

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•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.

•

Additional new BCUs shall be installed on existing 11kV Incomers to transfer the existing signals and controls to new SCS.

•

For all signals from existing s/s towards NCC/DCC, integration at gateway level shall be shall be done to have single channel towards control centers. Currently NCC communication is on IEC-101 whereas DCC communication is on IEC-104.

•

One HMI shall be provided in existing relay room.

•

Redundant Multi mode FO cables, including OTBs, shall be provided between existing control room to new 220kV relay room.


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM) - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement. TECHNICAL AFFAIRS Electricity Projects Dept.

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LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection for new equipment and integration with existing earthing system
LV Service Equipment and Works for the new equipment
Existing LV Service Equipment shall remain in function.
Security Management System according to specification enclosed in section 3.3.15.

•

Security management system shall cover both existing and new substation buildings, control rooms and open areas.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Civil works •

All civil works related to new 66/11kV substation and 66/11kV transformers including building services,


66KV GIS and Fire Pump Room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the new Transformers. All new Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the 66KV GIS Building, 11kV SWGR B, Transformer Yards (Power & Auxiliary), and all other areas.

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FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises

•

Required modification works with the existing system (tie-in) for Fire Detection and Alarm System, testing & commissioning, battery calculations, replacement of batteries (as per calculations, if required) etc in the existing Fire Detection & Alarm System (which must be verified during commissioning) are included in the present scope of works.

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH6 Contract during the tie-in works with the existing Fire Detection & Alarm System. Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card, interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving new 66KV GIS Fire alarm system, existing FACP shall be upgraded or replaced with new FACP.


Connection to the existing Underground Remote Oil Containment Tank, or new underground Remote Oil Containment Tank shall be constructed nearby to the 40MVA Transformers.
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing 66kV double cable circuit Al Waab Super – Mehairja Super shall be diverted into the Al Waab substation under the present Scope of Work. Existing cable circuits from Vegetable Market substation shall be diverted from the existing transformer into the new GIS at Al Waab substation under the present Scope of Work: The substation Contractor shall make all necessary arrangements to divert cable circuits to Al Waab substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion of the existing 66kV, 1x500mm2, XLPE, 40MVA, double circuit cables, from the existing 66/11kV Transformers into new 66kV GIS, connected to Vegetable Market S/S, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.

•

Diversion (Loop in / Loop out) of existing 66kV, 1x2000mm2, XLPE, 120MVA underground cable line with fiber optic cable (24 Fibers) between Al Waab Super – Mehairja Super into Al Waab S/S. Approximate route length: 300m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 66kV GIS type in Al Waab S/S and cable joints at diversion point. Cable is laid under phase 11 project. Refer to drawing TRANS-952014.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Sequence of Construction Works

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Milestone A Complete Substation extension, LILO of the existing 66kV cable line Al Waab Super and Mehairja Super into Al Waab S/S and the remote end works at Al Waab Super and Mehairja Super S/Ss.

•

Milestone B Divert one circuit Al Waab S/S - Vegetable Market S/S from the existing 66/11kV transformer into the new 66kV GIS, connect one existing 66/11kV transformer onto the new 66kV GIS and the corresponding remote end works at Vegetable Market S/S.

•

Milestone C Divert second circuit Al Waab S/S - Vegetable Market S/S from the existing 66/11kV transformer into the new 66kV GIS, connect second existing 66/11kV transformer onto the new 66kV GIS and the corresponding remote end works at Vegetable Market S/S.


REMOTE END WORKS AT VEGETABLE MARKET S/S 66/11kV Vegetable Market is an existing substation built by Siemens under Phase 5 Project. Vegetable Market will remain connected to Al Waab by 2x66kV cables, diverted from existing transformers to the new GIS at Al Waab. All modifications, End to End test, testing and commissioning and putting into service of these two modified circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Necessary modifications on the existing 66kV GIS bays, connected to the transformers at Al Waab substation, to equip the same as UGC feeder bays with Line VTs.

•

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Existing BCUs in 66kV bays may not have necessary spare BI/BO to connect new signals as per latest specification requirements. Hence Contractor shall install additional BCU or other suitable device to transfer all the required signals to SCS/NCC as per specification, including new VT connection and additional spare BI/BO.

•

Required Modifications to SCS supplied by Siemens under Phase 5 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data

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mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. •

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Al Waab substation are with Protection Relays/Equipments under Phase-5 project. •

For those 66kV Cable feeders connected to Al Waab substation, complete functional protection system as per standard specification shall be provided.

•

VTs are not available in 66kV GIS bays. New GIS 66kV VT shall be provided at Vegetable Market substation. The Contractor shall be fully responsible for all associated works, Synchro. Functionality and extension of Local Sync. Scheme, interlocks and required interfaces.

•

For those 66kV Cable feeders connected to Al Waab substation, complete functional protection system as per standard specification shall be provided. New main relays/equipment shall be installed at Al Waab to match the protection at Vegetable Market substation end (supplied under Phase-10 project).

•

Existing trip relays / TCS relays need to be replaced.

•

All the required modifications in existing bays with provision of additional auxiliary relays, BCU panels wiring etc. to meet the new VT provisions and Phase-13 protection requirement shall be responsibility of contractor.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

New main relays/equipment shall be installed at Vegetable Market substation to match the (new) protection at Al Waab substation end.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT MEHAIRJA SUPER S/S

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220/132/11kV Mehairja Super is a new Substation with 220kV, 132kV GIS, and 11kV Switchgear being constructed under Phase 11 Project. Mehairja Super is connected by double circuit 66kV Cable Lines to Al Waab Super S/S S and this cable circuits shall be diverted (by loop-in/loop-out) to Al Waab. All modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Mehairja Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS supplied under Phase 11 project to include changes to 2x66kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

2x66kV existing bays to be connected to Al Waab Substation are with Protection Relays/Equipment’s under Phase-11 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

The new Relays/Equipment to be installed at Al Waab substation should match the protection at 66kV Mehairja Super Substation end (supplied under Phase-11 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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REMOTE END WORKS AT AL WAAB SUPER S/S 220/132/66/11kV Al Waab Super is the existing substation built by M/s Siemens under Phase 7 project (GTC 123B/2006). Existing transformer feeder substation will be upgraded with the addition of 220kV GIS through separate package (S-1) under this project. Al Waab Super S/S is connected at 66kV level by double circuit cable lines to Mehairja Super and this cable circuits shall be diverted (by loop-in/loop-out)to Al Waab substation. All modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS supplied under Phase 7 project to include changes to 2x66kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

2x66kV existing bays to be connected to Al Waab Substation are with Protection Relays/Equipments under Phase-11 Project.

•

The new Relays/Equipment to be installed at Al Waab substation should match the protection at 66kV Al Waab Super Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract.

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Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

3.5.4

66/11KV AL WAAB 2 SUBSTATION 66/11kV Al Waab 2 is a new substation intended to cater power supply to the surrounding area. Al Waab 2 S/S will be connected to network by looping in looping out (LILO) the existing 66kV cable single circuit Abu Hamour North – Al Soudan South. The principal elements of new 66/11kV Al Waab 2 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

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•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Abu Hamour North and Al Soudan South substations. The new relays to be installed at 66/11kV Al Waab 2 substation shall match the protection at Abu Hamour North and Al Soudan South substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of:

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- 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 66/11kV substation including building services,
66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Fire hydrant and ring main piping (all around the substation buildings perimeter).

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary

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provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future). •

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


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Existing 66kV double circuit cable lines between Abu Hamour North and Al Soudan South substations shall be diverted (LILO) into the Al Waab 2 substation under the present Scope of Work: The substation Contractor shall make all necessary arrangements to divert the cable circuits to Al Waab 2 substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion (Loop in / Loop out) of existing single circuit 66kV, 1x2000mm2, XLPE, 120MVA underground cable line with fiber optic cable (24 Fibers) between Abu Hamour North and Al Soudan South S/S into Al Waab 2 S/S. Approximate route length: 500m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 66kV GIS type in Al Waab 2 S/S and cable joints at diversion point. Refer to attached drawing no. TRANS-2-2015.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


REMOTE END WORKS AT ABU HAMOUR NORTH S/S 66/11kV Abu Hamour North is an existing substation built under Phase 5 project by M/s Siemens. Abu Hamour North is being connected with Al Soudan South under ongoing phase 11 project, under which protection relays shall be upgraded. Abu Hamour North will be connected to Al Waab 2 by diversion (LILO) of the existing 1x66kV cables between Abu Hamour North & Al Soudan South substations. All modifications, End to End test, testing and commissioning and putting into service of these two circuits shall be carried out under the scope of this project. Modification works at Abu Hamour North shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope

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•

Required Modifications to SCS of Siemens make under Phase 5 project to include changes to 1x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection One 1x66kV existing bay to be connected to Al Waab 2 substation are with Protection Relays/Equipments under Phase-11 project. •

The relay provided at Abu Hamour North for Main-1 protection is Siemens make 7SD522 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Al Waab 2 substation should match the protection at 66kV Abu Hamour North Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT AL SOUDAN SOUTH S/S 66/11kV Al Soudan South is an existing substation with 66kV GIS and 11kV Switchgear built by L&T under Phase 11 Project. Al Soudan South will be connected to Al Waab 2 by diversion (LILO) of the existing 1x66kV cables between Abu Hamour North & Al Soudan South substations. All modifications, End to End test, testing and commissioning and putting into service of these two circuits shall be carried out under the scope of this project The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


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•

Required Modifications to SCS supplied by Siemens under Phase 11 project to include changes to 1x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection 1x66kV existing bays to be connected to Al Waab 2 substation are with Protection Relays/Equipments upgraded under Phase-11 project. •

The relay provided at Al Soudan South Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Al Waab 2 substation should match the protection at 66kV Al Soudan South Substation end (supplied under Phase-11 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

PACKAGE – S6

3.6

3.6.1

132/66/11KV MAITHER CENTRAL SUBSTATION (UPGRADE) 132/66/11kV Maither Central substation is the existing transformer feeder substation built by M/s Siemens under Phase 5 project. Existing substation shall be upgraded by expansion of the existing 66kV GIS, addition of 66/11kV transformers and addition of the 11kV switchgear. Maither Central substation shall remain connected to Al Wajbah Super S/S. The principal elements of the upgraded 132/66/11kV Maither Central substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Modification (Extension) of the existing 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3phase, 50Hz, single bus bar GIS consisting of following bays: - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers;

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Note: expansion of the existing 66kV GIS shall be done by the Original Equipment Manufacturer. •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: - Existing switchgear shall be named Switchgear A;

•

11kV Switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the existing substation as well for the new equipment, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection:

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Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. However, the following specific requirements shall be considered: •

Two new 66kV transformer HV bays shall be provided as detailed in Main Scope of the Work. New protection relays based on Phase 13 specifications shall be provided. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between two new 66kV transformer HV bays and new 11kV LV switchgears and protection. Contractor shall ensure that the new relays provided in 66kV Transformer HV Bays protection panels and those installed in new 11kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the new 66/11kV Transformers shall be done in order to provide complete protection.

•

Modifications of the existing 66kV Siemens make centralized Low Impedance Busbar protection, including conducting bus bar stability and addition of modules, shall be provided under this Contract.

•

Existing 11kV Switchgear shall be marked as 11kV Switchgear A with appropriate name plates and indications in SCS/NCC. Any required changes to existing protection relay settings, testing and re-commissioning of existing 40MVA transformer, 11kV Switchgear and earthing transformer shall be the responsibility of the Contractor.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 66kV control room to complete the necessary connection.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.

•

Minor modifications as required in existing Siemens make SCS HMI screens to show the new 66/11kV Transformer arrangements.

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•

Existing SCS Gateways is required to interface with new SCS Gateways.

•

Existing SCADA room shall be utilized to install new SCS system

•

Provision of protocol/media converters and fibers to connect all services at new control room to new SCS system.

•

Existing furniture to be dismantled.

•

New furniture shall be supplied to accommodate existing and new SCS system.

•

For new common alarms the contractor will use additional BCUs to maintain 20% spare availability.

•

One HMI shall be provided in new 11kV relay room.

•

Redundant Multimode FO cables, including OTBs, shall be provided between existing control room to new 220kV relay room.


Online Monitoring System •

Condition monitoring system comprising of: - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection for new equipment and integration with existing earthing system.
LV Service Equipment and Works comprising of: •

New LVAC switchboard for the new equipment;

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LVDC battery and battery charger for the new equipment.


Existing LV Service Equipment shall remain in function.
Security Management System according to specification enclosed in section 3.3.15. •

Security management system shall cover both existing and new substation building and open areas. If due to bidders’ design there are more than one control rooms, the bidder shall be bound to provide additional SMS material, if required, for both control rooms.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Civil works •

All civil works related to new 11kV substation B and 66/11kV transformers including building services,


Fire Pump Room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the new Transformers. All new Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the new 11kV switchgear building, Transformer Yards (Power & Auxiliary) and all other areas.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

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•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH5 Contract during the tie-in works with the existing Fire Detection & Alarm System (if requires). Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card, interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving new 11kV SWGR/Control building Fire alarm system, existing FACP shall be upgraded or replaced with new FACP (if requires).

•

Existing Fire Protection & Fire Detection & Alarm System drawings shall be updated.


Connection to the existing Underground Remote Oil Containment Tank, or new underground Remote Oil Containment Tank shall be constructed nearby to the 40MVA Transformers.
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

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66/11KV MUSEUM ROAD SUBSTATION (UPGRADE) 66/11kV Museum Road substation is the existing substation built by M/s ABB under Phase 6 project (GTC 05/2004). Existing substation shall be upgraded by expansion of the existing 66kV GIS, addition of 66/11kV transformers and addition of the 11kV switchgear. Museum Road substation shall remain connected to Airport Super S/S. In addition, Museum Road will be connected to Salata substation by 66kV, 120MVA double circuit cables. The cables will be installed under the separate Contract (GTC/736/2015, Package C4). Existing 66kV, 40MVA double circuit, Muntazah North – Museum Road shall be disconnected from Museum Road and diverted to the Old Ghanem. The principal elements of the upgraded 66/11kV Museum Road substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Modification of the existing 66kV, 1850A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - Re-testing and Re-commissioning of two numbers of the existing switchgear bays(B30 & B40), including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; Note: expansion of the existing 66kV GIS shall be done by the Original Equipment Manufacturer.

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: - Existing switchgear shall be named Switchgear A;

•

11kV Switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank;

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- Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for two (2) vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the existing substation as well for the new equipment, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: Relay Protection Equipment for all Primary Equipment (all new bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. However, the following specific requirements shall be considered:
2x66kV Cable connection to New Salata (S7 package): Two 2x66kV existing (B30 and B40) bays to be connected to New Salata substation substation are with Protection Relays/Equipments under Phase-13, (S7 package) project. •

For those 66kV Cable feeders connected to New Salata substation, complete functional protection system as per standard specification shall be provided. Presently Main relays REL316*4 and REL551 are provided. The new Relays/Equipment to be installed at Museum Road substation should match the new protection at New Salata substation. Existing relays including Over current relay shall be dismantled and returned to Kahramaa store according to the standard procedure.

•

Existing Trip relays / TCS relays need to be replaced with new one.

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•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Existing CTs (800/400/1 A) for B30 and B40 bays shall be replaced with new CTs to match with new 120MVA cable rating and protection/metering requirements. Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs.

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


Extension of GIS for Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers: •

Two new 66kV transformer HV bays shall be provided as detailed in Main Scope of the Work. New protection relays based on Phase 13 specifications shall be provided. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between two new 66kV transformer HV bays and new 11kV LV switchgears and protection. Contractor shall ensure that the new relays provided in 66kV Transformer HV Bays protection panels and those installed in new 11kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the new 66/11kV Transformers shall be done in order to provide complete protection.

•

Modifications of the existing 66kV ABB make Distributed Low Impedance Busbar protection, including conducting bus bar stability and addition of modules, shall be provided under this Contract.

•

Existing 11kV Switchgear shall be marked as 11kV Switchgear A with appropriate name plates and indications in SCS/NCC. Any required changes to existing protection relay settings, testing and re-commissioning of existing 40MVA transformer, 11kV Switchgear and earthing transformer shall be the responsibility of the Contractor.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 66kV control room to complete the necessary connection.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

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Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.

•

Existing BCUs on 66kV feeders (B30 & B40) shall be replaced with the new ones and connected to the new SCS. New protection relays to be connected to the new SCS.

•

Minor modification required in existing ABB make SCS HMI screens to show the new 66/11kV Transformer arrangements.

•

Existing SCS Gateways is required to interface with new SCS Gateways.

•

Provision of protocol/media converters and fibers to connect all services at new control room to new SCS system.

•

Existing furniture to be dismantled.

•

New furniture shall be supplied to accommodate existing and new SCS system.

•

For new common alarms the contractor will use additional BCUs to maintain 20% spare availability.

•

One HMI shall be provided in new 11kV relay room.

•

Redundant Multimode FO cables, including OTBs, shall be provided between existing control room to new 220kV relay room.


Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor. TECHNICAL AFFAIRS Electricity Projects Dept.

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•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection for new equipment and integration with existing earthing system.
LV Service Equipment and Works for the new equipment. •

New LVAC switchboard;

•

LVDC battery and battery charger for the new Transformers and switchgears;

•

New UPS;


Existing LV Service Equipment shall remain in function.
Security Management System according to specification enclosed in section 3.3.15. •

Security management system shall cover both existing and new substation building and open areas. If due to bidders’ design there are more than one control rooms, the bidder shall be bound to provide additional SMS material, if required, for both control rooms.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Civil works •

All civil works related to new 11kV substation B and 66/11kV transformers including building services,

•

Demolition of existing boundary wall (one side only, refer tender Drg.) and construction of new boundary wall as shown in the tender drawing. Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject

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to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities. •

Establish parking spaces at grade level on the adjacent plot to the allocated substation plot once the construction of the substation is finalized.


Fire Pump Room Cranes
Air-conditioning and ventilation systems to cover new buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the new Transformers. All new Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the new 11kV switchgear building, Transformer Yards (Power & Auxiliary) and all other areas.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in PH6 Contract during the tie-in works with the existing Fire Detection & Alarm System (if requires). Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card, interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving

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new 11kV SWGR/Control building Fire alarm system, existing FACP shall be upgraded or replaced with new FACP (if requires). •

Existing Fire Protection & Fire Detection & Alarm System drawings shall be updated.


Connection to the existing Underground Remote Oil Containment Tank, or new underground Remote Oil Containment Tank shall be constructed nearby to the 40MVA Transformers.
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits from Muntazah North shall be disconnected from Museum Road and diverted to the Old Ghanem. The substation Contractor should make all necessary arrangements to connect cable circuits at Old Ghanem substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. Refer to attached drawing No. TRANS-012015. •

Diversion of the existing 66kV, 1x300mm2, XLPE, 40MVA, double circuit, from the existing 66kV GIS at Museum Road into 66kV GIS at Old Ghanem laid in unfilled concrete troughs with all accessories. Approx. route length: 500m.

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•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.

•

The remaining existing 66kV up to Museum Road S/S shall be disconnected and capped at both ends.


REMOTE END WORKS AT MUNTAZAH NORTH S/S 66/11kV Muntazah North is an existing 66/11kV transformer feeder substation built by ABB under Phase 6 Project. The existing 2x66kV cable feeders to Muntazah North will be disconnected from Museum Road and diverted to the existing 66kV GIS at Old Ghanem substation. All modifications, End to End test, testing and commissioning and putting into service of these two modified circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing 11kV Switchgear bays, including required modifications in the existing 11kV Switchgear bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of 11kV Switchgear name plates and any required works including, wiring, testing & complete recommissioning of the above 11kV Switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by ABB under Phase 6 project to include changes to 2x66kV Cable transformer feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Old Ghanem substation are with Protection Relays/Equipments under Phase-9 project. •

For those 66kV Cable feeders connected to Old Ghanem substation, complete functional protection system as per standard specification shall be provided to match protection system at Old Ghanem substation. Presently Main relays REL316*4 and REL551 are provided. The new Relays/Equipment to be installed at Muntazah North substation should match the new protection at Old Ghanem substation (Main-1 Siemens make 7SD5 shall be used for F87C protection and Main-2 Protection ABB make RED670 shall be F87C+T protection). Existing Main relays including over current relay shall be dismantled and returned to Kahramaa store according to the standard procedure.

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•

Existing trip relays / TCS relays need to be replaced.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing Partial bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT OLD GHANEM S/S 66/11kV Old Ghanem is an existing substation with 66kV GIS and 11kV Switchgear built by Siemens under Phase 9 Project (GTC 240D/2008). Old Ghanem will be connected to Muntazah North by diverting the existing 2x66kV, Double Circuit, Muntazah North – Museum Road into 66kV GIS at Old Ghanem. All modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes to 2x66kV Cable transformer feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection

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Two 2x66kV existing (B50 & B60) bays to be connected directly to transformer at Muntazah North substation are with Protection Relays/Equipments under GTC/240D/2008 Phase-9 project. •

The relay provided at Old Ghanem for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Muntazah North substation should match the protection at 66kV Old Ghanem Substation end (supplied under Phase-9 project). The Main-1 Siemens make 7SD5 shall be used for F87C protection and Main-2 Protection ABB make RED670 shall be F87C+T protection.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


Remote end Modification at Salata Substation Salata is a new 66/11kV substation which will be constructed under Package (S-7) in this project. The museum road substation will be connected to Salata substation with 2x66kV cable circuit. The cables will be installed by a cable contractor under separate contract. The substation contractor shall coordinate with cable contractor and Salata substation contractor for the successful completion of all necessary works for putting these feeders into service including end to end test, overall stability, co-ordination with NCC, SCS modification, etc. All contractors shall mutually agree and co-ordinate the activities. In case of any disputes in this regard, Kahramaa decision will be final. 3.6.3

132/11KV AIN SINAN SUBSTATION 132/11kV Ain Sinan substation is intended to cater power supply to the surrounding areas. Ain Sinan S/S will be connected to Madinat Al Kaban by 132kV double circuit OHL under this project. The principal elements of new 132/11kV Ain Sinan substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bay;

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- Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Two (2) Nos. OHL bays with SF6-Air bushings for connection with OHL conductor at OHL landing gantry along with aluminum clamps for connection to twin bundle AAAC flint conductor; - Two (2) Nos. Cable feeder bays (spare); - Space for four future bays, two on each side of the switchgear; •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


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•

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Madinat Al Kabaan substation. The new relays to be installed at 132/11kV Ain Sinan substation shall match the protection at Madinat Al Kabaan substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement. TECHNICAL AFFAIRS Electricity Projects Dept.

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LV Power Cables, Control Cables with all accessories.
Small Power & Lighting
Earthing & Lightning Protection
Surge Arrestors for OHL feeders
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

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Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
All outdoor insulators, cable compound equipment, terminal equipment, etc. shall be provided with RTV coating.
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

•

132kV, XLPE, 250MVA, 1x2000sqmm double circuit underground power cables and the associated communication cables (fiber optic pilot) between terminal compound and 132KV GIS at Ain Sinan substation. Approximate route length: 100m. (Alternative to GIB, in case layout difficulty).

•

132kV Outdoor Cable Sealing Ends suitable for the 2x132kV OHL feeder terminations with 132kV, XLPE, 250MVA, 1x2000sqmm UG cables including structures, foundations etc. at Ain Sinan substation Terminal Compound (Alternative to GIB, in case layout difficulty).

•

132kV GIS Sealing Ends suitable for the 2x132kV feeder terminations with 132kV, XLPE, 250MVA, 2000sqmm UG cables including necessary material and accessories and steel structure at Ain Sinan Substation (Alternative to GIB, in case layout difficulty).


ESTABLISHMENT OF 132KV OVERHEAD LINE MADINAT AL KABAN S/S / AIN SINAN S/S

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The proposed construction of 132kV Double Circuit OH Line with twin bundle AAAC FLINT conductor per phase for transmission of 250MVA of power of each circuit with a total length of approximately 14km between the existing substation Madinat Al Kabaan S/S (132/11kV) and new Ain Sinan S/S (132/11kV) Substation. The basic OH line characteristics shall be as follows: •

Twin bundle AAAC FLINT phase conductor,

•

Porcelain or toughened glass coated insulators (shall be considered as main offer) or (HTV, SIR) Composite Insulators (to be proposed as alternative offer), and all other required OHL accessories,

•

Steel lattice towers and gantries (with fencing if they are located outside substation compound) complete with structure earthing,

•

Two composite earthwires (OPGW) with 48 Fibres each,

•

OHL termination to the equipment at terminal Substations.

The scope shall also include survey approvals from MMAA, mechanical design considering the safety of the operation and maintenance of each individual line, supply, installation testing and commissioning. At existing Madinat Al Kabaan S/S (132/11kV) and new Ain Sinan S/S (132/11kV), the 132kV OH Line shall be terminated to the new OHL double Gantries which shall be located within substation fences. Terminal towers, gantries, shall be provided in order to lead in the lines; down leads to the gantries, down droppers, conductor links and conductor branching clamps to the Cable Compound equipment shall be provided also. All earthworks and earthing systems related to the OHL shall be provided also under this Contract. Refer to attached drawing No. TRANS-13-2014. Contractor is responsible for all works related to End-to-End testing of FO links (F#1, F#2) between Madinat Al Kabaan S/S and new Ain Sinan S/S. The Contractor shall coordinate with GTC 735/2015 Telecom Contractor to complete the works. All required modifications at existing Madinat Al Kabaan S/S (132/11kV), LCC, SCS, etc. shall be covered under this SOW Item.
REMOTE END WORKS AT MADINAT AL KABAAN S/S 132/11kV Madinat Al Kabaan is an existing substation with 132kV GIS and 11kV Switchgear built by L&T under Phase 10 Project. Madinat Al Kabaan will be connected to Ain Sinan by new 132kV, double circuit OHL. All modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. Modification works at Madinat Al Kabaan shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. GTC-735 SCOPE OF WORKS R0

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The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Alstom make supplied by L&T under Phase 10 project to include changes to 2x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x132kV existing bays to be connected to Ain Sinan substation are with Protection Relays/Equipments under GTC/371A/2006 Phase-10 project.

3.6.4

•

The relay provided at Madinat Al Kabaan for Main-1 protection is Alstom make P545 and for Main-2 Protection is Siemens make 7SD52. The new Relays/Equipment to be installed at Ain Sinan substation should match the protection at 132kV Madinat Al Kabaan Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

132/11KV JERYAN JENAIHAT 1 SUBSTATION 132/11kV Jeryan Jenaihat 1 substation is intended to cater mainly Boulevard mall project. Jeryan Jenaihat 1 S/S will be connected to network by looping in looping out (LILO) existing single 132kV cable circuit Jeryan Jenaihat Super S/S – Al Khissa West S/S into Jeryan Jenaihat 1 S/S.

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LILO of the cable circuit Jeryan Jenaihat Super S/S – Al Khissa West S/S is scope of this project. The principal elements of new 132/11kV Jeryan Jenaihat 1 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Jeryan Jenaihat Super and Al Khissa West substations. The new relays to be installed at 132/11kV Jeryan Jenaihat 1 substation shall match the protection at Jeryan Jenaihat Super and Al Khissa West substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

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•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuit listed below shall be diverted into the Jeryan Jenaihat 1 substation under the present Scope of Work: •

1 x 132kV Jeryan Jenaihat Super – Al Khissa West.

The substation Contractor should make all necessary arrangements to divert and connect cable circuits at Jeryan Jenaihat 1 substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion.

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Diversion (Loop in / Loop out) of existing single circuit 132kV, 1x2000mm2, XLPE, 250MVA underground cable line with fiber optic cable (24 Fibers) between Jeryan Jenaihat Super and Al Khissa West S/S into Jeryan Jenaihat 1 S/S. Approximate route length: 700m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 132kV GIS type in Jeryan Jenaihat 1 S/S and cable joints at diversion point. Refer to attached drawing TRANS-14-2015. The circuits of Elsewedy make were installed by M/s NCC under Phase 10 project (GTC/372F-2010).

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


REMOTE END WORKS AT JERYAN JENAIHAT SUPER S/S 220/132/66/11kV Jeryan Jenaihat Super is an existing substation with 220kV GIS, 132kV GIS and 11kV Switchgear built by Siemens under Phase 10 Project. Umm Salal Mohamed Super is renamed as Jeryan Jenaihat Super. Jeryan Jenaihat Super will be connected to Jeryan Jenaihat 1 by diverting (LILO) of the existing 1x132kV, Single Circuit, Jeryan Jenaihat Super – Al Khissa West into Jeryan Jenaihat 1. All modifications, End to End test, testing and commissioning and putting into service of the circuit shall be carried out under the scope of this project. Modification works at Jeryan Jenaihat Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of the existing GIS bay, including required modifications in the existing GIS bay along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes to 1x132kV Cable feeder in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection

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One 1x132kV existing bays to be connected to Jeryan Jenaihat 1 substation are with Protection Relays/Equipments under GTC/240A/2008 Phase-9 project. •

The relay provided at Jeryan Jenaihat Super for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Jeryan Jenaihat 1 substation should match the protection at 132kV Jeryan Jenaihat Super Substation end (supplied under Phase9 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT AL KHISSA WEST S/S 132/11kV Al Khissa West is an existing substation with 132kV GIS and 11kV Switchgear built by Siemens under Phase 10 Project. Al Khissa West will be connected to Jeryan Jenaihat 1 by diverting (LILO) the existing 1x132kV, Single Circuit, Jeryan Jenaihat Super – Al Khissa West into Jeryan Jenaihat 1. All modifications, End to End test, testing and commissioning and putting into service of the two circuits required shall be carried out under the scope of this project. Modification works at Al Khissa West shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of the existing GIS bay, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS of Siemens make installed under Phase 10 project to include changes to 1x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.

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Protection One 1x132kV existing bay to be connected to Jeryan Jenaihat 1 substation are with Protection Relays/Equipments under GTC/371/2010 Phase-10 project. •

The relay provided at Al Khissa West feeder to be connected to Jeryan Jenaihat 1 for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED 670.

•

The new Relays/Equipment to be installed at Jeryan Jenaihat 1 substation should match the protection at 132kV Al Khissa West Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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PACKAGE – S7

3.7

3.7.1

66/11KV NEW DOHA E SUBSTATION (REPLACEMENT) New Doha E is new substation to be installed in a multi-storey building consisting of substation (occupying ground and first floor) and Car Parking (other floors). New 66/11kV substation is intended to replace the existing 66/11kV substation. The Contractor scope covers construction of the complete multi-storey building and substation as detailed below including design, obtaining Building Permit, all civil construction works and building services. QCS 2014 and other relevant standards shall be applicable for the multistory building. The car park design shall comply with open parking structure. Standard Kahramaa specifications shall be used for the substation itself. New Doha E S/S will be connected to network: • • •

by looping in looping out (LILO) existing 66kV single cable circuit from West Bay Super 2 – New Doha A Super into New Doha E S/S, by diverting the existing single cable circuit from West Bay Super 2 from the existing 66kV GIS into new 66kV GIS at New Doha E and by diverting the existing single cable circuit from New Doha A Super from the existing 66kV GIS into new 66kV GIS at New Doha E.

The principal elements of new 66/11kV New Doha E substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Four (4) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish two 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgears with vacuum circuit breakers, consisting of the following:

•

11kV switchgear A: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers;

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- Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. •

11kV switchgear B: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear.

Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to New Doha A Super and West Bay Super 2 substations. The new relays to be installed at 66/11kV New Doha E substation shall match the protection at New Doha A Super and West Bay Super 2 substation end.

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•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - Partial discharge online monitoring system for 66kV GIS; - Online condition monitoring system for new 66/11kV, 40MVA power transformers. - Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15.
Parking Management System
Civil works •

All civil works related to new multi-storey building, 66/11kV substation including building services, as per relevant specification and drawings.

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•

The substation building shall also be provided with the rooms for the future 11kV Capacitor Banks, as shown in the layout drawing.

•

Necessary number of sleeves for all outgoing feeders shall be provided on the substation building and boundary wall

•

Outgoing feeder cable routing (66kV and 11kV) inside the basement to be proposed by the contractor to facilitate convenient installation of future cables upon requirement.

•

Independent Fire Fighting System for the multi-storey car parking building shall be provided including Fire Pumping Station, Fire Pumps & Controllers, Fire Water Tank, Fire Alarm & Detection System, Fire Hose Reels with cabinets/all accessories, Dry Riser System and other necessary systems in accordance with QCDD requirements.

•

Smoke Control System (Means of Escape & Means of Egress - Exit Access, Exitsstaircases/elevator shafts & exit discharge shall be pressurized) as per the QCDD requirements & relevant NFPA standards.


66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Transformer Explosion Prevention System for Power Transformers.

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

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Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits listed below shall be diverted into the New Doha E substation under the present Scope of Work: •

LILO of the 1 x 66kV New Doha A Super and West Bay Super 2,

•

1 x 66kV New Doha A Super from the existing 66kV GIS and

•

1 x 66kV West Bay Super 2 from the existing 66kV GIS.

The substation Contractor should make all necessary arrangements to connect cable circuits at New Doha E substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion (Loop in / Loop out) of existing 66kV, 1x1600mm2, XLPE, 120MVA underground cable line with fiber optic cable (24 Fibers) between New Doha A Super and West Bay Super 2 into New Doha E S/S. Approximate route length: 500m. The Contractor shall include all necessary modification works and equipment including all link boxes and earth continuity conductors in the earthing arrangement (cross bonding, single point bonding or mixed bonding) in order to ensure that required current rating of diverted circuit is maintained. Necessary

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details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The terminations shall be 66kV GIS type in New Doha E S/S and cable joints at diversion point. Refer to drawing No. TRANS-52-2014. The circuits are under installation under Phase 11 project. •

Diversion of the existing 66kV, 1x1600mm2, XLPE, 120MVA, single circuit, from the existing 66kV GIS into new 66kV GIS, connected to New Doha A Super S/S, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m. Existing 2 x 66kV cables between New Doha A Super and West Bay Super 2 are laid under phase 7 project (GTC124D/2006) by M/s Saudi Cable and one circuit is LILO into existing New Doha E under Phase 11 project.

•

Diversion of the existing 66kV, 1x1600mm2, XLPE, 120MVA, single circuit, from the existing 66kV GIS into new 66kV GIS, connected to West Bay Super 2 S/S, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m. Existing 2 x 66kV cables between New Doha A Super and West Bay Super 2 are laid under phase 7 project (GTC124D/2006) by M/s Saudi Cable and one circuit is LILO into existing New Doha E under Phase 11 project.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Requirement for Kahramaa distribution S/S: •

Contractor shall coordinate with Kahramaa distribution department to get approval on starting a new project, called a new scheme, required for construction of Kahramaa distribution S/S.

•

Contractor shall work in close coordination with Kahramaa distribution department to get approval for the work and get the material required for completing the work.

•

For the subject work Contractors scope of work is:

•

Supply and installation of Two (2) Nos. Transformers 11/0.415kV, of 1000kVA rating, complete with current transformer on high voltage side with 11 kV air filled cable box. These transformers shall be for connection to LVAC switchboard for purpose of power supply to car park building.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and 11/0.415, 1000kVA transformers. Approx. route length: 30m.

•

Supply and installation of LVAC switchboard which will be used for power supply to car park building. The contractor shall provide necessary equipment such as distribution boards, LV cables, etc. and complete the works as specified and required..

•

Supply and installation of 415V cables between 11/0.415kV transformer and LVAC switchboard.

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Supply & Installation of other required equipment and materials such as battery chargers, batteries and any other materials as required for the completeness of the work as per the scheme approved by Kahramaa distribution department …).


Sequence of Construction Works •

Milestone A Complete Substation, LILO of the existing 66kV cable line New Doha A Super and West Bay Super 2 into New Doha E S/S and the remote end works at New Doha A Super and West Bay Super 2 S/Ss.

•

Milestone B Divert the cables from the existing 66kV GIS into the new 66kV GIS and the corresponding remote end works.


REMOTE END WORKS AT NEW DOHA A SUPER S/S 220/66/11kV New Doha A Super is an existing 220/66/11kV substation with 220kV GIS, 66kV GIS and 11kV Switchgear built by Siemens under Phase 11 Project. New Doha A Super will be connected to New Doha E by diverting (LILO) of the existing 1x66kV, Single Circuit, New Doha A Super and West Bay Super 2 into New Doha E and using the existing 1x66kV, Single Circuit, New Doha A Super – New Doha E. All modifications, End to End test, testing and commissioning and putting into service of the two circuits required shall be carried out under the scope of this project. Modification works at New Doha A Super shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 11 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection

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Two 2x66kV existing bays to be connected to New Doha E substation are with Protection Relays/Equipments under GTC/488B/2006 Phase-11 project. •

The relay provided at New Doha A Super are provided under phase – 11 project. The new Relays/Equipment to be installed at New Doha E substation should match the protection at 66kV New Doha A Super Substation end (supplied under Phase11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


REMOTE END WORKS AT WEST BAY SUPER 2 S/S 220/66/11kV West Bay Super 2 is an existing substation with 220kV GIS, 66kV GIS and 11kV Switchgear built by Siemens under Phase 7 Project. West Bay Super 2 will be connected to New Doha E by diverting (LILO) of the existing 1x66kV, New Doha A Super and West Bay Super 2 cable circuit into New Doha E and using the existing 1x66kV, West Bay Super 2 – New Doha E. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 7 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.

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Protection Two 2x66kV existing bays to be connected to New Doha E substation are with Protection Relays/Equipments under GTC/488B/2006 Phase-11 project.

3.7.2

•

The relay provided at West Bay Super 2 feeder connected to New Doha E for Main protection relays will be replaced during phase 11 project to match protection equipment at New Doha A Super.

•

The relay provided at West Bay Super 2 feeder connected to New Doha A Super for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is ABB make RED670.

•

The new Relays/Equipment to be installed at New Doha E substation should match the protection at 66kV West Bay Super 2 Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

66/11KV SALATA SUBSTATION (REPLACEMENT) Salata is new substation to be installed in a multi-storey building consisting of substation (occupying ground and first floor) and Car Parking (other floors). New 66/11kV substation is intended to replace the existing 66/11kV substation. The Contractor scope covers construction of the complete multi-storey building and substation as detailed below including design, obtaining Building Permit, all civil construction works and building services. QCS 2014 and other relevant standards shall be applicable for the multistory building. The car park design shall comply with open parking structure. Standard Kahramaa specifications shall be used for the substation itself. Salata S/S will be connected to network by double cable circuits from Museum Road substation under this project and by diverting the existing cable circuits from (from the existing 66kV Switchgear to the new 66kV GIS at Salata) Khalifat S/S. The principal elements of new 66/11kV Salata substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays:

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- Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear; •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear.

Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation, with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: GTC-735 SCOPE OF WORKS R0

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•

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Khalifat substation. The new relays to be installed at 66/11kV Salata substation shall match the protection at Khalifat substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - Partial discharge online monitoring system for 66kV GIS; - Online condition monitoring system for new 66/11kV, 40MVA power transformers. - Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories.
Security Management System according to specification enclosed in section 3.3.15. GTC-735 SCOPE OF WORKS R0

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Parking Management System
Civil works •

All civil works related to new multi-storey building, 66/11kV substation including building services, as per relevant specification and drawings.

•

The substation building shall also be provided with the rooms for the future 11kV Capacitor Banks, as shown in the layout drawing.

•

Necessary number of sleeves for all outgoing feeders shall be provided on the substation building and boundary wall

•

Outgoing feeder cable routing (66kV and 11kV) inside the basement to be proposed by the contractor to facilitate convenient installation of future cables upon requirement.

•

Independent Fire Fighting System for the multi-storey car parking building shall be provided including Fire Pumping Station, Fire Pumps & Controllers, Fire Water Tank, Fire Alarm & Detection System, Fire Hose Reels with cabinets/all accessories, Dry Riser System and other necessary systems in accordance with QCDD requirements.

•

Smoke Control System (Means of Escape & Means of Egress - Exit Access, Exitsstaircases/elevator shafts & exit discharge shall be pressurized) as per the QCDD requirements & relevant NFPA standards.


66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Transformer Explosion Prevention System for the Power Transformers.

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

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•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables:
66kV, 1x2000mm², XLPE, 120MVA, double circuit, single point bonding system underground cable line between Salata and Museum Road S/S. Each circuit shall be provided with its own Fiber Optic cable (48 Fibers) with all accessories. Approx. route length: 0.5km. Necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. The termination is GIS at Salata S/S and GIS at Museum Road S/S (upgrade under GTC/735/20015 package 6). Refer to attached drawing no. TRANS-112-2014. •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Modification of Existing Cables Existing cable circuits from Khalifat substation shall be diverted from the existing Switchgear into the new GIS at Salata substation under the present Scope of Work.

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The substation Contractor should make all necessary arrangements to connect cable circuits at new GIS at Salata substation. The Contractor shall be responsible to maintain rating of the existing circuits after diversion. •

Diversion of the existing 66kV, 1x630mm2, XLPE, 60MVA, double circuit, from the existing 66kV GIS into new 66kV GIS, connected to Khalifat S/S, laid in unfilled concrete troughs with all accessories and communication cables. Approx. route length: 500m. Existing cables are diverted under phase 9 project from the GIS at old Khalifat S/S into new GIS by M/s Siemens. Refer to attached drawing No. TRANS-113-2014.

•

All labels related to Power and fiber optic cables (within existing substations and along cable route) shall be replaced based on new connection scheme after diversion.


Requirement for KM distribution S/S: •

Contractor shall coordinate with Kahramaa distribution department to get approval on starting a new project, called a new scheme, required for construction of Kahramaa distribution S/S.

•

Contractor shall work in close coordination with Kahramaa distribution department to get approval for the work and get the material required for completing the work.

•

For the subject work Contractors scope of work is:

•

Supply and installation of Two (2) Nos. Transformers 11/0.415kV, of 1000kVA rating, complete with current transformer on high voltage side with 11 kV air filled cable box. These transformers shall be for connection to LVAC switchboard for purpose of power supply to car park building.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and 11/0.415, 1000kVA transformers. Approx. route length: 30m.

•

Supply and installation of LVAC switchboard which will be used for power supply to car park building. The contractor shall provide necessary equipment such as distribution boards, LV cables, etc. and complete the works as specified and required.

•

Supply and installation of 415V cables between 11/0.415kV transformer and LVAC switchboard.

•

Supply & Installation of other required equipment and materials such as battery chargers, batteries and any other materials as required for the completeness of the work as per the scheme approved by Kahramaa distribution department …).


REMOTE END WORKS AT KHALIFAT S/S

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66/11kV Khalifat is an existing substation with 66kV GIS and 11kV Switchgear built by Siemens under Phase 9 Project. Khalifat will be connected to Salata substation by diverting the existing 2x66kV, Khalifat – Salata cable circuits into new 66kV GIS. All required modifications, End to End test, testing and commissioning and putting into service of the two circuits shall be carried out under the scope of this project. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing GIS bays, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes to 2x66kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection Two 2x66kV existing bays to be connected to Salata substation are with Protection Relays/Equipments under GTC/240D/2008 Phase-9 project. •

The relay provided at Khalifat for Main-1 protection is Siemens make 7SD5 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Salata substation should match the protection at 66kV Khalifat Substation end (supplied under Phase-9 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


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Museum Road is an existing 66/11kV substation which will be upgraded under Package (S-6) in this project. The Museum Road Substation will be connected to Salata Substation with 2x66kV Cable circuit. The cables will be installed by a cable contractor under separate contract. The substation Contractor shall coordinate with cable contractor and Museum Road substation Contractor for the successful completion of all necessary works for putting these feeders into service including end to end test, overall stability, coordination with NCC, SCS modification, etc. All contractors shall mutually agree and coordinate the activities. In case of any disputes in this regard, Kahramaa decision will be final. •

2x66 feeder bays at Salata substation will be connected by 2x66kV cable circuits to Museum Road substation. All the required works at New Museum Road substation shall be carried out under S6 package.

•

All protection coordination work with S6 package contractor including testing and commissioning, relay testing on final setting, end to end test, overall stability and putting in service are included in the present Scope.

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PACKAGE – S8

3.8

3.8.1

132/11KV MASHAF 1 SUBSTATION 132/11kV Mashaf 1 substation is intended to cater power supply for the new growing demand of Mashaf area. Mashaf 1 S/S will be connected to network by 132kV double circuit cable from RAF South and Mashaf 2 substations. Both cable circuits will be installed under separate Contract (GTC/736/2015, Package C7). The principal elements of new 132/11kV Mashaf 1 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

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•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to RAF South substation. The new relays to be installed at 132/11kV Mashaf 1 substation shall match the protection at RAF South substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM);

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- 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

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•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT RAF SOUTH S/S 132/11kV RAF South is a new Substation, being under constructed under Phase 12 Project. Mashaf 1 shall be connected to RAF South by double circuit 132kV Cable lines. All modifications, End to End test, testing and commissioning and putting into service of two circuits shall be carried out under the scope of this project. Modification works at RAF South shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: GTC-735 SCOPE OF WORKS R0

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•

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 2x132kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

2x132kV existing bays to be connected to Mashaf 1 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Mashaf 1 substation should match the protection at 132kV RAF South Substation end (supplied under Phase12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Mashaf-2 Remote End S/S Works: The remote end substation, Mashaf-2, is also to be built under the same package and will be connected to the new Mashaf-1 S/S with 2x132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C7). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.8.2

132/11KV MASHAF 2 SUBSTATION 132/11kV Mashaf 2 substation is intended to cater power supply for the new growing demand of Mashaf area. Mashaf 2 S/S will be connected to network by single 132kV cable

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circuits from Mashaf 3 and Al Wukair 10 substations and by 132kV double cable circuits from Mashaf 1 substation. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C7). The principal elements of new 132/11kV Mashaf 2 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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•

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Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. TECHNICAL AFFAIRS Electricity Projects Dept.

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•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

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•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Mashaf-1, 3 & Al Wukair-10 Remote End S/S Works: The remote end substations, Mashaf-1, 3 & Al Wukair-10 are also to be built under the same package and will be connected to the new Mashaf-1 S/S with 132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C7). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.8.3

132/11KV MASHAF 3 SUBSTATION 132/11kV Mashaf 3 substation is to cater power supply for the new growing demand of Mashaf area. Mashaf 3 S/S will be connected to network by single 132kV cable circuit from Mashaf 2 and from Bul Hemmaid substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C7).

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The principal elements of new 132/11kV Mashaf 3 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total

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load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.
Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Bul Hemmaid substation. The new relays to be installed at 132/11kV Mashaf 3 substation shall match the protection at Bul Hemmaid substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

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•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS& Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab

GTC-735 SCOPE OF WORKS R0

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openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings. •

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT BUL HEMMAID S/S 400/132/11kV Bul Hemmaid is a new Substation, being constructed under Phase 12 Project. Mashaf 3 shall be connected to Bul Hemmaid by single circuit 132kV Cable line. All modifications, End to End test, testing and commissioning and putting into service of the circuit shall be carried out under the scope of this project. Modification works at Bul Hemmaid shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:

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SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeder in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to Mashaf 3 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Mashaf 3 substation should match the protection at 132kV Bul Hemmaid Substation end (supplied under Phase-12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Mashaf-2 Remote End S/S Works: The remote end substation, Mashaf-2, is also to be built under the same package and will be connected to the new Mashaf-3 S/S with 1x132kV cable circuit. The cables will be installed under separate contract (GTC/736/2015, Package C7). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.8.4

132/11KV AL WUKAIR 10 SUBSTATION 132/11kV Al Wukair 10 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 10 S/S will be connected to network by single 132kV cable circuit from Mashaf 2 and from Bul Hemmaid substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C7). The principal elements of new 132/11kV Al Wukair 10 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear

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•

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Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.

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Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Bul Hemmaid substations. The new relays to be installed at 132/11kV Al Wukair 10 substation shall match the protection at Bul Hemmaid substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage. TECHNICAL AFFAIRS Electricity Projects Dept.

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Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

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REV. 0

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT BUL HEMMAID S/S 400/132/11kV Bul Hemmaid is a new Substation, being constructed under Phase 12 Project. Al Wukair 10 shall be connected to Bul Hemmaid by single circuit 132kV Cable line. All modifications, End to End test, testing and commissioning and putting into service of the circuit shall be carried out under the scope of this project. Modification works at Bul Hemmaid shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: GTC-735 SCOPE OF WORKS R0

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•

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeder in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to Al Wukair 10 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Al Wukair 10 substation should match the protection at 132kV Bul Hemmaid Substation end (supplied under Phase-12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Mashaf-2 Remote End S/S Works: The remote end substation, Mashaf-2, is also to be built under the same package and will be connected to the new Al Wukair-10 S/S with 1x132kV cable circuit. The cables will be installed under separate contract (GTC/736/2015, Package C7). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

GTC-735 SCOPE OF WORKS R0

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PACKAGE – S9

3.9

3.9.1

132/11KV AL WUKAIR 9 SUBSTATION 132/11kV Al Wukair 9 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 9 S/S will be connected to network by single 132kV cable circuit from Al Wukair 8 and from Bul Hemmaid substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C8). The principal elements of new 132/11kV Al Wukair 9 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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•

REV. 0

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Bul Hemmaid substations. The new relays to be installed at 132/11kV Al Wukair 9 substation shall match the protection at Bul Hemmaid substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

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•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT BUL HEMAID S/S 400/132/11kV Bul Hemmaid is a new Substation, being constructed under Phase 12 Project. Al Wukair 10 shall be connected to Bul Hemmaid by single circuit 132kV Cable line. All modifications, End to End test, testing and commissioning and putting into service of the circuit shall be carried out under the scope of this project. Modification works at Bul Hemmaid shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: GTC-735 SCOPE OF WORKS R0

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•

Re-testing and Re-commissioning of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeder in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to Al Wukair 9 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Al Wukair 9 substation should match the protection at 132kV Bul Hemmaid Substation end (supplied under Phase-12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Al Wukair-8 Remote End S/S Works: The remote end substation, Al Wukair-8, is also to be built under the same package and will be connected to the new Al Wukair-9 S/S with 1x132kV cable circuit. The cables will be installed under separate contract (GTC/736/2015, Package C8). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

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3.9.2

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132/11KV AL WUKAIR 8 SUBSTATION 132/11kV Al Wukair 8 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 8 S/S will be connected to network by single 132kV cable circuits from Al Wukair 6, Al Wukair 9 and Bul Hemmaid substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C8). The principal elements of new 132/11kV Al Wukair 8 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (three (3) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

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•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Bul Hemmaid substation. The new relays to be installed at 132/11kV Al Wukair 8 substation shall match the protection at Bul Hemmaid substation ends.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM);

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- 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

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•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT BUL HEMAID S/S 400/132/11kV Bul Hemmaid is a new Substation, being constructed under Phase 12 Project. Al Wukair 8 shall be connected to Bul Hemmaid by single circuit 132kV Cable Line. All modifications, End to End test, testing and commissioning and putting into service of the circuit shall be carried out under the scope of this project. Modification works at Bul Hemmaid shall be arranged in a way not to affect the Warranty Period. GTC-735 SCOPE OF WORKS R0

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The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeder in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to Al Wukair 8 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Al Wukair 8 substation should match the protection at 132kV Bul Hemmaid Substation end (supplied under Phase-12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Al Wukair-6 & 9 Remote End S/S Works: The remote end substations, Al Wukair-6 & 9, are also to be built under the same package and will be connected to the new Al Wukair-8 S/S with 1x132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C8). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

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3.9.3

REV. 0

132/11KV AL WUKAIR 7 SUBSTATION 132/11kV Al Wukair 7 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 7 S/S will be connected to network by single 132kV cable circuit from Al Wukair 6 and from Bul Hemmaid substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C8). The principal elements of new 132/11kV Al Wukair 7 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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•

REV. 0

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Bul Hemmaid substations. The new relays to be installed at 132/11kV Al Wukair 7 substation shall match the protection at Bul Hemmaid substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

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•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

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•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT BUL HEMAID S/S 400/132/11kV Bul Hemmaid is a new Substation being constructed under Phase 12 Project. Al Wukair 7 shall be connected to Bul Hemaid by single circuit 132kV Cable Line. All modifications, End to End test, testing and commissioning and putting into service of the circuit shall be carried out under the scope of this project. Modification works at Bul Hemmaid shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following:

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•

Re-testing and Re-commissioning of the existing switchgear bay, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under Phase 12 project to include changes to 1x132kV Cable feeder in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

1x132kV existing bays to be connected to Al Wukair 7 Substation are with Protection Relays/Equipments under Phase-12 Project.

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Al Wukair 7 substation should match the protection at 132kV Bul Hemmaid Substation end (supplied under Phase-12 project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Al Wukair-6 Remote End S/S Works: The remote end substation, Al Wukair-6, is also to be built under the same package and will be connected to the new Al Wukair-7 S/S with 1x132kV cable circuit. The cables will be installed under separate contract (GTC/736/2015, Package C8). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.9.4

132/11KV AL WUKAIR 6 SUBSTATION 132/11kV Al Wukair 6 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 6 S/S will be connected to network by single 132kV

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cable circuits from Al Wukair 7, Al Wukair 8 and Al Wukair 5 substations. The cable circuits will installed under separate Contract (GTC/736/2015, Package C8 and C9). The principal elements of new 132/11kV Al Wukair 6 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (three (3) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. TECHNICAL AFFAIRS Electricity Projects Dept.

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•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

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•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END works at Al Wukair 5 Al Wukair-5 is a new 132/11kV substation which will be constructed under separate package (S-10) in this project. The Al Wukair-6 Substation will be connected to Al Wukair5 Substation with 1x132kV Cable circuit. The cables will be installed by a cable contractor under separate contract. The substation Contractor shall coordinate with cable contractor and Al Wukair-5 substation Contractor for the successful completion of all necessary works for putting these feeders into service including end to end test, overall stability, coordination with NCC, SCS modification, etc. All contractors shall mutually agree and coordinate the activities. In case of any disputes in this regard, Kahramaa decision will be final.
Al Wukair-7 & 8 Remote End S/S Works: The remote end substations, Al Wukair - 7 & 8, are also to be built under the same package and will be connected to the new Al Wukair-6 S/S with 1x132kV cable circuit. The GTC-735 SCOPE OF WORKS R0

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cables will be installed under separate contract (GTC/736/2015, Package C8). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

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PACKAGE – S10

3.10

3.10.1

132/11KV AL WUKAIR 5 SUBSTATION 132/11kV Al Wukair 5 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 5 S/S will be connected to network by double 132kV cable circuit from Al Wukair 4 and by single 132kV cable circuits from Al Wukair 2, Al Wukair 3 and Al Wukair 6 substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C9). The principal elements of new 132/11kV Al Wukair 5 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (one (1) No. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

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•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

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Dedicated Inlet and Outlet connections to connect multigas DGA sensor. TECHNICAL AFFAIRS Electricity Projects Dept.

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•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the

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substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders. •

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END works at Al Wukair 6 Al Wukair-6 is a new 132/11kV substation which will be constructed under separate package (S-9) in this project. The Al Wukair-5 Substation will be connected to Al Wukair-6 Substation with 1x132kV Cable circuit. The cables will be installed by a cable contractor under separate contract. The substation Contractor shall coordinate with cable contractor and Al Wukair-6 substation Contractor for the successful completion of all necessary works for putting these feeders into service including end to end test, overall stability, coordination with NCC, SCS modification, etc. All contractors shall mutually agree and coordinate the activities. In case of any disputes in this regard, Kahramaa decision will be final.

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Al Wukair-2, 3 & 4 Remote End S/S Works: The remote end substations, Al Wukair-2, 3 & 4, are also to be built under the same package and will be connected to the new Al Wukair-5 S/S with 132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C9). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.10.2

132/11KV AL WUKAIR 4 SUBSTATION 132/11kV Al Wukair 4 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 4 S/S will be connected to network by double 132kV cable circuits from Al Wukair 5 and 132kV FACILITY D (QEZ-3) substations under separate Contract (GTC/736/2015, Package C9). The principal elements of new 132/11kV Al Wukair 4 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Four (4) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish two 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgears with vacuum circuit breakers, consisting of the following:

•

Switchgear A: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear.

•

Switchgear B:

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- One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to 132kV FACILITY D substation. The new relays to be installed at 132/11kV Al Wukair 4 substation shall match the protection at 132kV FACILITY D substation ends.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

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•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services, GTC-735 SCOPE OF WORKS R0

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132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

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•

11kV, 1x630mm2, XLPE, four single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests,. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT 132kV FACILITY D (QEZ 3) S/S Facility D is a new generation project including 400kV, 220kV and 132kV Gas insulated switchgear being constructed under IWPP project. The Facility D IWPP Substation with 400kV GIS shall be owned, operated and maintained by the IWPP. 220kV and 132kV GIS shall be owned, operated and maintained by Kahramaa and will be connected to the Al Wukair 4 S/S by double circuit 132kV Cable line. All modifications, End to End test, testing and commissioning and putting into service of two circuits shall be carried out under the scope of this project. Modification works at QEZ 3 shall be arranged in a way not to affect the Warranty Period. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of two numbers of the existing switchgear bays, including required modifications in the existing switchgear bays along with Local Control Panels including Indicating Meters in the Local Control Panels, inscription of additional Alarm facia as required, replacing of Switchgear Name plates and any required works including, wiring, testing & complete re-commissioning of the above switchgear bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS to be supplied under IWPP project to include changes to 2x132kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: •

2x132kV existing bays to be connected to Al Wukair 4 Substation are with Protection Relays/Equipments under IWPP Project.

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•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these circuits is included in the Present Scope. The new Relays/Equipment to be installed at Al Wukair 4 substation should match the protection at 132kV Facility D Substation end (supplied under IWPP project).

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.


Al Wukair-5 Remote End S/S Works: The remote end substation, Al Wukair-5, is also to be built under the same package and will be connected to the new Al Wukair-4 S/S with 2x132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C9). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.10.3

132/11KV AL WUKAIR 3 SUBSTATION 132/11kV Al Wukair 3 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 3 S/S will be connected to network by single 132kV cable circuit from Al Wukair 2 and from Al Wukair 5 substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C9). The principal elements of new 132/11kV Al Wukair 3 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: - One (1) No. Bus section bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Four (4) Nos. Cable feeder bays (two (2) Nos. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A;

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- Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

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Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes

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Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department. Al Wukair-2 & 5 Remote End S/S Works




The remote end substations, Al Wukair-2 & 5, are also to be built under the same package and will be connected to the new Al Wukair-3 S/S with 1x132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C9). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

3.10.4

132/11KV AL WUKAIR 2 SUBSTATION 132/11kV Al Wukair 2 substation is intended to cater power supply for the new growing demand of Al Wukair area. Al Wukair 2 S/S will be connected to network by single 132kV cable circuits from Al Wukair 1, Al Wukair 3 and Al Wukair 5 substations. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C9). The principal elements of new 132/11kV Al Wukair 2 substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays (three (3) No. spare); - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A;

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- Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Two (2) Nos. Bays for future Capacitor bank; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the present total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for

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11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.

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Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT AL WUKAIR 1 S/S 132/11kV AL WUKAIR 1 is an existing substation with 132kV and 11kV Switchgear built by Siemens under Phase 11 Project. AL WUKAIR 1 will be connected to AL WUKAIR 2 by single 132kV cable circuit. All required modifications, End to End test, testing and commissioning and putting into service of the one circuit shall be carried out under the scope of this project. Modification works at AL WUKAIR 1 shall be arranged in a way not to affect the Warranty Period, if still valid at the time of new works. The SOW includes but is not limited to the following: •

Re-testing and Re-commissioning of one number of the existing GIS bay, including required modifications in the existing GIS bays along with Local Control Panels including indicating meters in the local control Panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bay.

•

Protection and SCS systems as detailed below:


SCS and Power Control Scope •

Required Modifications to SCS supplied by Siemens under Phase 11 project to include changes to 1x132kV Cable feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS.


Protection One 1x132kV existing bay to be connected to AL WUKAIR 2 are with Protection Relays/Equipments under GTC/488C Phase-11 project. •

The relays provided at AL WUKAIR 1 are provided under phase – 11 projects. The new Relays/Equipment to be installed at AL WUKAIR 2 substation should match the protection at 132kV AL WUKAIR 1 Substation end (supplied under Phase-11 project).

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•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.


Al Wukair-3, & 5 Remote End S/S Works: The remote end substations, Al Wukair-3 & 5, are also to be built under the same package and will be connected to the new Al Wukair-2 S/S with 1x132kV cable circuits. The cables will be installed under separate contract (GTC/736/2015, Package C9). The substation contractor shall coordinate with cable contractor and complete all necessary works for putting these feeders into service.

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PACKAGE – S11

3.11

3.11.1

66/11KV ABU HAMOUR WEST S/S 66/11kV Abu Hamour West is a new 66/11kV Transmission Substation to be constructed to meet the Power supply requirements in Abu Hamour area. The new 66/11kV Abu Hamour West substation will be fed by 2x66kV cables from the existing Al Wadi West substation. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C10). The principal elements of 66/11kV Abu Hamour West Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Nos. Bus Section bays;

-

Two (2) Nos. Bus Coupler bays;

-

Two (2) Nos. Outgoing Transformer bays for 66/11 kV;

-

Four (4) Nos. Outgoing feeder bays (2 spare);

-

Space for four future bays, two on each side of the switchgear.

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

One (1) No. Bus section bay rated 2500A;

-

Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A;

-

Eighteen (18) Nos. Outgoing feeder bays rated 630A;

-

Two (2) Nos. Bays for future capacitor bank;

-

Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers;

-

Space for four future bays, two on each side of the 11kV switchgear.

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

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•

Two (2) Nos. 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks along with space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all Bays) as detailed in Main Scope of Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Al Wadi West substation. The new relays to be installed at 66/11kV Abu Hamour West substation shall match the protection at Al Wadi West substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each one of the 11kV incomer bays and each one of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each bus, i.e., for a two bus substation there shall be two load shedding panels.


SCS & Associated Equipment Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and s/s works necessary for NCC/ENCC/DCC End – to – End testing.
Online Monitoring System •

Condition monitoring system comprising of:

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- 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM) - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment with all accessories
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 132/11kV substation including building services,
132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary

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provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future). •

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment
Power Cables: •

66kV, 1x500 mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20 m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


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66/11kV Al Wadi West Substation is an existing substation constructed by M/s Hyosung under Phase 10 project. The new Abu Hamour West Substation will be connected to Al Wadi West Substation with 2 x 66kV Cables. The cables will be installed by a cable contractor under separate contract. All the required modifications at Al Wadi West substation shall be carried out under the present scope of work. •

Re-testing and re-commissioning of the GIS bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS of Siemens make supplied by NCC under Phase 10 project to include changes to 2x66kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: 2x66kV existing bays to be connected to Abu Hamour West Substation are with Protection Relays/Equipments under Phase-10 Project. •

The relay provided at Al Wadi West for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is Alstom make P545. The new Relays/Equipment to be installed at Abu Hamour West substation should match the protection at 66kV Al Wadi West Substation end (supplied under Phase-10 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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66/11KV RAWDAT AL KHAIL 2 S/S 66/11kV Rawdat Al Khail 2 is a new Transformer Feeder Substation to be constructed to meet the Power supply requirements in surrounding area. The new 66/11kV Rawdat Al Khail 2 substation. The cable circuits will be fed by 2x66kV cables from the existing Rawdat Al Khail substation to be installed under the separate Contract (GTC/736/2015, Package C10). The principal elements of 66/11kV Rawdat Al Khail 2 Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

One (1) No. Bus section bay rated 2500A;

-

Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A;

-

Eighteen (18) Nos. Outgoing feeder bays rated 630A;

-

Two (2) Nos. Bays for future capacitor bank;

-

Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers;

-

Space for four future bays, two on each side of the 11kV switchgear.

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks along with space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.

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Protection Systems •

Relay Protection Equipment for all Primary Equipment (all Bays) as detailed in Main Scope of Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected Rawdat Al Khail substation. The new relays to be installed at 66/11kV Rawdat Al Khail 2 substation shall match the protection at Rawdat Al Khail substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each one of the 11kV incomer bays and each one of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each bus, i.e., for a two bus substation there shall be two load shedding panels.


SCS & Associated Equipment Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and s/s works necessary for NCC/ENCC/DCC End – to – End testing.
Online Monitoring System •

Condition monitoring system comprising of: - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below:

GTC-735 SCOPE OF WORKS R0

•

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement. TECHNICAL AFFAIRS Electricity Projects Dept.

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LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All Civil works related to new 66/11kV substation including building services,
Fire Pump Room Cranes
Air-conditioning and ventilation systems to cover the switchgear and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers & Shunt Reactors. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


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Power Cables: •

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20 m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT RAWDAT AL KHAIL SUBSTATION: 66/11kV Rawdat Al Khail Substation is a new substation being constructed by M/s L&T under Phase 11 project. The new Rawdat Al Khail 2 Substation will be connected to Rawdat Al Khail Substation with 2 x 66kV Cables. The cables will be installed by a cable contractor under separate contract. All the required modifications at Rawdat Al Khail substation shall be carried out under the present scope of work. •

Re-testing and re-commissioning of the GIS bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS supplied by Siemens under Phase 11 project to include changes to 2x66kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: 2x66kV existing bays to be connected to Rawdat Al Khail 2 Substation are with Protection Relays/Equipments under Phase-11 Project.

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•

The relay provided at Rawdat Al Khail for Main-1 protection is Alstom make P545 and for Main-2 Protection is Siemens make 7SD52. The new Relays/Equipment to be installed at Rawdat Al Khail 2 substation should match the protection at 66kV Rawdat Al Khail Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

66/11KV LUAIB S/S 66/11kV Luaib is a new 66/11kV Transmission Substation to be constructed to meet the Power supply requirements in surrounding area. The new 66/11kV Luaib substation will be fed by 2x66kV cables from the existing Mehairja Super substation. The cable circuits will be installed under separate Contract (GTC/736/2015, Package C10). The principal elements of 66/11kV Luaib Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Nos. Bus Section bays;

-

Two (2) Nos. Bus Coupler bays;

-

Two (2) Nos. Outgoing Transformer bays for 66/11 kV;

-

Six (6) Nos. Outgoing feeder bays (4 spare);

-

Space for four future bays, two on each side of the switchgear.

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

One (1) No. Bus section bay rated 2500A;

-

Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A;

-

Eighteen (18) Nos. Outgoing feeder bays rated 630A;

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-

Two (2) Nos. Bays for future capacitor bank;

-

Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers;

-

Space for four future bays, two on each side of the 11kV switchgear.

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks along with space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all Bays) as detailed in Main Scope of Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Mehairja Super substation. The new relays to be installed at 66/11kV Luaib substation shall match the protection at Mehairja Super substation end.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each one of the 11kV incomer bays and each one of the Auxiliary Transformer bays. Separate load shedding panel shall be provided for 11kV outgoing feeders of each bus, i.e., for a two bus substation there shall be two load shedding panels.

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SCS & Associated Equipment Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and s/s works necessary for NCC/ENCC/DCC End – to – End testing.
Online Monitoring System •

Condition monitoring system comprising of: - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM) - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All Civil works related to new 66/11kV substation including building services. Note: The architectural appearance of the Substation buildings and boundary wall shall aesthetically match with the structures in the surrounding area and is subject to approval of concerned authorities. All design approvals in this regard shall be coordinated with the concerned authorities.
66kV GIS & Fire Pump room Cranes GTC-735 SCOPE OF WORKS R0

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Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment
Power Cables: •

66kV, 1x500 mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20 m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


REMOTE END WORKS AT MEHAIRAJAH SUPER: 220/132/11kV Mehairja Super is a new Substation being constructed under Phase 11 Project by M/s L&T under Phase 11 project (GTC488F). The new Luaib Substation will be connected to Mehairja Super Substation with 2 x 66kV Cables. The cables will be installed by a cable contractor under separate contract. All the required modifications at Mehairja Super substation shall be carried out under the present scope of work. •

Re-testing and re-commissioning of the GIS bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Protection and SCS systems as detailed below:


SCS and Power Control: •

Minor Modifications to SCS of ABB make supplied under Phase 11 project to include changes to 2x66kV Cable feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: 2x66kV existing bays to be connected to Luaib Substation are with Protection Relays/Equipments under Phase-11 Project. •

The relay provided at Mehairja Super for Main-1 protection is Siemens make 7SD52 and for Main-2 Protection is ABB make RED670. The new Relays/Equipment to be installed at Luaib substation should match the protection at 66kV Mehairja Super Substation end (supplied under Phase-11 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

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3.11.4

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•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

33/11KV ABU SAMRA SUBSTATION (UPGRADE) 33/11kV Abu Samra substation is the existing substation built under earlier Kahramaa projects. Existing 33/11kV transformer feeder S/S shall be upgraded by addition of the 33kV GIS. Abu Samra S/S will stay connected to Ain Hamad S/S by 33kV double OHL, which will be diverted from the existing 33kV switchgear to 33kV GIS at Ain Hamad. The principal elements of new 33/11kV Abu Samra substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 33kV, 2500A at 40˚C, 31.5kA / 1 sec, single bus bar GIS, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. outgoing Transformer bays for 33/11kV Transformers; - Four (4) Nos. feeder bays rated 1250A (two (2) spare); - Space for four future bays, two on each side of the 33kV switchgear.


Existing 11kV switchgear bays - Re-testing and re-commissioning of the existing A 18, A 28 , A30 & A 40 switchgear bays and any required works/modifications including, wiring, naming, label changes, testing & complete re-commissioning of the above switchgear bays.
Two (2) Nos. Auxiliary Transformers 11/0.415kV, 500kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 4.75% impedance, neutral CTs, etc. Existing 315kVA auxiliary transformers to be replaced with 500kVA transformers as specified above at new location and existing power cables from A 30 & A 40 11kV switchgear bays to be diverted to the new auxiliary transformers
Dismantling of 315kVA aux Transformers and to hand over safely to KM store.
Protection: Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote end (in line with remote end protection scope of works) shall be provided for feeders connected to Ain Hamad substation. However, the following specific requirements shall be considered: GTC-735 SCOPE OF WORKS R0

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•

Protection at Abu Samra substation for 2x33kV OHL feeders to be connected to Ain Hamad substation shall be provided to be compatible with already installed relays at Ain Hamad substation. End to End test, Testing and commissioning and putting into service of these two OHL circuits shall be substation Contractor's responsibility.

•

New (HV side) protection for existing 33/11kV Power Transformer shall be provided based on Phase 13 specifications, installed in new control room. All modification on the 33kV and 11V sides of the 33/11kV Power Transformer protection shall be done to make it compatible with 33kV side protection. Contractor shall ensure all the required modifications including provision of any trip/auxiliary relays, cabling/wiring to achieve Interlocks and Intertrips between 33kV HV side (new control building) and existing 11kV LV switchgears and protection.

•

Presently, existing panels (E11 & E21), provided with transformer (HV) side protection and OHL line differential protection. OHL line differential protection shall be dismantled and returned to Kahramaa store as per standard procedure. Transformer mechanical protections relays are provided in the 33kV HV panels as per old protection philosophy. However, new provision of transformer mechanical protections relays based on new 33/11kV transformer protection philosophy shall be contractor’s responsibility. Existing HV side panels shall be converted to LV side protection panels. Alternatively, new LV protection panels can be provided and exact details shall be decided during detail engineering. Contractor shall ensure that the relays provided in new 33kV Transformer HV Bays protection panels and those installed in existing 11kV LV bay protection panels are complete so as to achieve a complete functional protection for the Transformers. Testing and commissioning of the 33/11kV Transformers protection.

•

AVR panels with AVR relays are provided for existing two number 33/11kV Transformers, located in existing control room. Existing AVR equipment shall be tested and its proper functioning shall be ensured by the Contractor; however, any AVR equipment modifications, testing and commissioning for AVR scheme due to connection to new 33kV GIS shall be Contractor's responsibility.

•

All other protections shall be provided as per the standard specification.

•

Contractor is responsible to lay control cables (as necessary) and fibre Optic Cables from existing OTP installed in telecom room up to new 33kV control room to complete the necessary connection and end-to-end test of protection for the said links (New control room in Abu Samra to Ain Hamad).

•

Any required changes to existing protection relay settings, testing and recommissioning of existing 33/11kV transformer, 11kV Switchgear and earthing transformer shall be the responsibility of the Contractor.


SCS & Associated Equipment •

New Substation Control System Including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

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•

The existing control system of Alstom PSCN 3020 with Gateways being modified by M/s. Schneider is having IEC101 for communication to both DCC and NCC. New SCS shall manage communication to NCC/ENCC/DCC of the new 33kV GIS, the existing 11kV switchgear and existing station common alarms.

•

Existing 11kV–A BCUs and Measurement Units shall be replaced to integrate with new SCS. Old 11kV-A protection IEDs to be wired through new BCUs. (alternatively communication module of protection IEDs can be replaced for communication with new SCS)

•

Existing substation signals shall be shifted to from IEC-101 to IEC-104 through new SCS.

•

Existing SCS shall be dismantled and handed over to Kahramaa.

•

Unwanted alarms to be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.

•

Redundant Multimode FO cables, including OTBs, shall be laid between new Control Room and existing Control & Relay Room.

•

For new common alarms the contractor will use additional BCUs to maintain 20% spare availability.

•

One HMI shall be provided in existing 11kV relay room.


FO and Copper Cables: •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


Online Monitoring System •

Condition monitoring system comprising of: - 33kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM);


LV Power Cables, Control Cables with all accessories for the new equipment as well as for the connections to the existing equipment/systems. Sizing and Voltage drop calculation shall be strictly carried out for the cables to be proposed from existing LV services to the new building.
Small Power & Lighting
Earthing & Lightning Protection including connection to the existing system,

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LVAC Board with all accessories - LV cables from the new 500kVA auxiliary transformers shall be connected to the new LVAC Board. Besides, two dedicated feeders shall be provided with adequate capacity to feed existing LVAC board situated in the existing control room building.
New LVDC Board, Battery, Battery charger and UPS to cater the load requirements of new equipment and building.
Security Management System according to specification enclosed in section 3.3.15.

•

Security management system shall cover both existing and new substation building and open areas. If due to bidders’ design there are more than one control rooms, the bidder shall be bound to provide additional SMS material, if required, for both control rooms.


FOC and Pilot wire •

Laying, termination and testing of copper cables to extend Telephones from old to new building.

•

Laying, termination and testing of two FO single mode cables (2 * 48F) from old to new building including OTBs in new building.


All civil works related to new 33kV GIS including building services, •

Dismantling and reconstruction of existing septic tank and manhole to new location.

•

New / Reconstruction of internal road as required.


Air-conditioning and ventilation systems to cover the GIS.
Fire Fighting System •

Fire Detection & Alarm System for the 33KV GIS building & all other areas.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises

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•

Required modification works with the existing system (tie-in) for Fire Detection and Alarm System, testing & commissioning, battery calculations, replacement of batteries (as per calculations, if required) etc in the existing Fire Detection & Alarm System (which must be verified during commissioning) are included in the present scope of works.

•

EPC Contractor must engage the services of the vendor or specialist Fire contractor involved in execution of existing Fire Alarm System during the tie-in works with the existing Fire Detection & Alarm System. Commissioning works must be carried out only by the authorized vendor or Fire contractor who has installed the existing system.

•

Introduction of loop card, interface modules & provision of required number of relays in the existing Fire Alarm Control Panel for transmitting signals to SCS. In case of there is no space in the existing FACP to introduce loop card for serving new 33KV GIS & other areas Fire alarm system, existing FACP shall be upgraded or replaced with new FACP.

•

Existing Fire Detection & Alarm System drawings shall be updated.


Power Cables: •

Diversion of the existing 33kV, 2x500mm2, XLPE, 100MVA, double circuits, from 33/11kV Transformer into 33kV GIS, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

33kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor between 33kV GIS and 33/11kV Power Transformers, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.


Sequence of Construction Works •

Milestone A Complete 33kV GIS, connect one cable from the 33kV existing transformer to the new GIS and the remote end works at Ain Hamad.

•

Milestone B Connect the second cable from the 33kV existing transformer to the new GIS and the corresponding remote end works at Ain Hamad.


REMOTE END WORKS AT AIN HAMAD S/S 132/33/11kV Ain Hamad substation is the existing substation built under earlier Kahramaa projects. Existing 33/11kV S/S has been upgraded by addition of the 132kV GIS, 2 x 132/33kV, 100MVA transformers and an additional 33kV GIS under phase 12 project. Abu Samra will remain connected to Ain Hamad Substation with 2 x 33kV OHL. Minor modifications at Ain Hamad substation shall be carried out under the present scope of work. GTC-735 SCOPE OF WORKS R0

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SCS and Power Control: •

Minor Modifications to SCS supplied under Phase 12 project to include changes to 2x33kV OHL feeders in the SCS including Gateway Data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

•

Alarms no more required shall be deleted and Alarms related to modifications are to be included in the SCS.


Protection: 2x33kV existing bays connected to Abu Samra Substation are with Protection Relays/Equipments under Phase-12 Project. •

The new Relays/Equipment to be installed at Abu Samra substation should match the protection at 132/33/11kV Ain Hamad Substation end (supplied under Phase12 project).

•

Retesting of the Relays/Equipment, all modifications, End to End test, testing and commissioning and putting into service of these two circuits is included in the Present Scope.

•

Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

Minor modification of the existing Bus bar protection, including conducting Bus bar stability and addition of modules if required, shall be provided under this Contract. Direct inter-trip for Breaker failure, Gas pressure low and Bus bar protection operation are to be made available between the Stations based on requirement.

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PACKAGE S-12

3.12

3.12.1

220/132/11KV FRAMEWORK SUBSTATION The principal elements of new 220/132/11kV Framework Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 220kV, 4000A at 40˚C, 50kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Three (3) Nos. outgoing Transformer bays for 220/132kV Transformers suitable for cable connection as per the approved connection arrangement; - Two (2) Nos. Shunt Reactor bays suitable for cable connection as per the approved connection arrangement; - Six (6) Nos. cable feeder bays; - Space for four future bays, two on each side of the switchgear;

•

Establish 132kV, 3150A at 40˚C, 40kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Three (3) Nos. incoming Transformer bays for 220/132kV Transformers suitable for GIB connection as per the approved connection arrangement; - Two (2) Nos. outgoing Transformer bays for 132/11kV Transformers; - Six (6) Nos. Cable feeder bays; - Three (3) Nos. 132kV, 315MVA bus duct between 220/132kV Power Transformers and 132kV GIS; - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 132/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A;

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- Two (2) Nos. Bays for future Capacitor bank; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on each side of the 11kV switchgear. Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Three (3) Nos. Power Transformers (Auto) 220/132kV, 189/236/315MVA, YNa0(d1) ONAN/ONAF/OFAF cooling, ±10% on load taps in steps of 1.25%, 13.6% impedance on ONAN (189 MVA), provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. 220kV, 60MVAr Shunt Reactors with terminal CTs, neutral CTs etc.

•

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 2000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 6% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

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•

REV. 0

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of: - Partial discharge online monitoring system for 220kV GIS; - Online condition monitoring system for new 220/132kV, 315MVA Transformers; - Online condition monitoring system for new 220kV, 60MVAr Shunt Reactors; - 132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.

- Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.
LV Power Cables, Control Cables with all accessories
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Earthing & Lightning Protection
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 220/132/11kV substation including building services.
220kV and 132kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Fire Fighting System •

Deluge Water Spray System for Power Transformers, Shunt Reactors & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Fire hydrant and ring main piping (all around the substation buildings perimeter).

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers & Shunt Reactors. All Transformers & Shunt Reactors shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Shunt Reactors, Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank

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Power Cables:

3.12.2

•

220kV, 1x1600mm2, XLPE, 315MVA, triple circuit, single point earthed with earth continuity conductor cable links between 220kV GIS and 220/132kV Transformers, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

220kV, 1x500mm2, XLPE, 60MVA, double circuit, solid bonded cable links between 220kV GIS and 220kV Shunt Reactors, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

132kV, 1x2000mm2, XLPE, 315MVA, triple circuit, single point earthed with earth continuity conductor cable links between 132kV GIS and 220/132kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 100m. (alternative to 132kV GI bus duct in case of layout difficulty)

•

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 2000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

220/66/11KV FRAMEWORK SUBSTATION The principal elements of new 220/66/11kV Framework Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 220kV, 4000A at 40˚C, 50kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays;

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- Two (2) Nos. outgoing Transformer bays for 220/66kV Transformers suitable for cable connection as per the approved connection arrangement; - Two (2) Nos. Shunt Reactor bays suitable for cable connection as per the approved connection arrangement; - Six (6) Nos. cable feeder bays; - Space for four future bays, two on each side of the switchgear; •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: - Two (2) Nos. Bus section bays; - Two (2) Nos. Bus coupler bays; - Two (2) Nos. incoming Transformer bays for 220/66kV Transformers suitable for GIB connection as per the approved connection arrangement; - Two (2) Nos. outgoing Transformer bays for 66/11kV Transformers; - Six (6) Nos. Cable feeder bays; - Two (2) Nos. 66kV, 200MVA bus duct between 220/66kV Power Transformers and 66kV GIS; - Space for four future bays, two on each side of the switchgear;

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - One (1) No. Bus section bay rated 2500A; - Two (2) Nos. Incomers for 66/11kV Transformers rated 2500A; - Eighteen (18) Nos. Outgoing feeder bays rated 630A; - Two (2) Nos. Bays for future Capacitor bank; - Two (2) Nos. Bays for 11/0.415kV Auxiliary Transformers; - Space for four future bays, two on each side of the 11kV switchgear.

Alternatively, 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers (Auto) 220/66kV, 120/150/200MVA, YNyn0(d1) ONAN/ONAF/OFAF cooling, ±10% on load taps in steps of 1.25%, 13% impedance on ONAN (200 MVA), provided with AVR, terminal CTs, neutral CTs etc.

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•

Two (2) Nos. 220kV, 60MVAr Shunt Reactors with terminal CTs, neutral CTs etc.

•

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1, with ONAN/ONAF cooling, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.5 ohm at 50˚C rated for 750A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 32/40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 2000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 6% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformer supplied shall be of adequate capacity to cater to the total load of the substation with additional capacity of 30%. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection: •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules.

•

For 11kV outgoing feeders pilot wire differential relay (for copper pilot) or Numerical relay with fibre optic interphase (for Fibre optic cable) shall be provided which shall be decided during detail design. Other protection and schemes as applicable in specification shall be provided.

•

For capacitor bank bays, all protection similar to outgoing feeders shall be provided. Separate protection panel shall be provided for each one of the capacitor bank bay.

•

Separate panel shall be provided for each of the 11kV Incomer bays and each Auxiliary Transformer bays. Separate Load Shedding Panel shall be provided for 11kV outgoing feeders of each Switchgear i.e., for a two Switchgear Substation (A & B) there shall be two Load Shedding Panels.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing


Online Monitoring System •

Condition monitoring system comprising of:

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- Partial discharge online monitoring system for 220kV GIS; - Online condition monitoring system for new 220/66kV, 200MVA Transformers; - Online condition monitoring system for new 220kV, 60MVAr Shunt Reactors; - 66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM); - 40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: •

Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

•

Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure.

•

Provision to install moisture sensor.

•

Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position.

•

Sensor for Transformer Load Current and voltage.

•

Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.

- Integrated HMI workstation for monitoring system including software for each online condition monitoring system installed in S/S as well as for their remote access; - Necessary LAN & WAN equipment including router/firewall for connection to remote end.
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
LV Service Equipment
Security Management System according to specification enclosed in section 3.3.15.
All civil works related to new 220/66/11kV substation including building services.
220kV and 66kV GIS & Fire Pump room Cranes
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings. GTC-735 SCOPE OF WORKS R0

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Fire Fighting System •

Deluge Water Spray System for Power Transformers, Shunt Reactors & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Fire hydrant and ring main piping (all around the substation buildings perimeter).

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers & Shunt Reactors. All Transformers & Shunt Reactors shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Shunt Reactors, Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material (fire penetration) for all the MEP openings including HVAC & Fire/Smoke damper openings, floor/slab openings such as panel openings including future openings, cable sleeve/duct openings (spare/future) & all other cable openings including 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation


Underground Remote Oil Containment Tank
Power Cables: •

220kV, 1x1200mm2, XLPE, 200MVA, double circuit, single point earthed with earth continuity conductor cable links between 220kV GIS and 220/66kV Transformers, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

220kV, 1x500mm2, XLPE, 60MVA, double circuit, solid bonded cable links between 220kV GIS and 220kV Shunt Reactors, laid in unfilled concrete troughs with all accessories. Approx. route length: 100m.

•

66kV, 1x2000mm2, XLPE, 200MVA, double circuit, single point earthed with earth continuity conductor cable links between 66kV GIS and 220/66kV Power

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Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 100m. (alternative to 66kV GI bus duct in case of layout difficulty)

3.12.3

•

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 2000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

REMOTE END WORKS – TYPICAL The following remote end works shall be done in all types of remote end substations: •

Re-testing and re-commissioning of the existing GIS spare bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS scope All necessary co-ordination with the cable contractor for the termination of the EHV cables at both ends.

•

Other necessary works, depending of the substation built date, are divided into four categories (types) which are described below.


Remote End Modification - TYPE-1: Substations Built During Phase 8 and Later •

The spare bays at remote end Substations built under Phase 8 and later shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end

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Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following: •

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 220kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation for Kahramaa review and Adequacy of existing CTs must be checked. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control Scope: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-2: Substations Built During Phase 7

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•

The spare bays at remote end Substations built under Phase 7 shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 220kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be replaced to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. Replacement of the existing Trip relay and TCS Relay. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

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- Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.
Remote End Modification - TYPE-3: Substations Built During Phase 5 & 6 and GTC/53 •

All the required modifications in the remote end substations built under Phase 5 & 6 and GTC 53 projects shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Re-testing and re-commissioning of the existing GIS/ Switchgear bays in service along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS/ Switchgear name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection: - The required modification works for protection systems is detailed under protection scope of work hereunder - For those 220kV Cable feeders connected to new typical substation S/S, complete functional protection system as per standard specification shall be provided. Existing trip relays / TCS relays need to be replaced. - New relays/equipment shall be installed at remote end substation to match the (new) protection at new typical substation end. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). Installation of additional CT core or changing of the existing CTs shall be the responsibility of the Contractor. Optional unit price for the (132kV GIS) CT replacement and all associated works shall be provided. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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- All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Existing BCUs shall be replaced to accommodate additional alarms.


Remote End Modification - TYPE-4: Substations Built During Phase 4 and Earlier •

All the required modifications in the remote end substations with indoor/ outdoor switchgear supplied under Phase 4 and earlier projects built in early 1980s shall be carried out under the present scope of work.

•

The contractor’s scope of work includes thorough checking and refurbishment of the existing equipment to deliver fully working system. For Control and Protection the contractor shall deliver new equipment as mentioned in the scope of work of the protection works. The scope of work shall include but not limited to the following:

•

Refurbishment of existing 220kV switchgear bays

•

Replacement of 220kV isolators, if required (to be quoted in price schedule as an optional item)

•

The existing 220V control panels shall be modified as required to match with the new cable feeder MVA rating. The new control panels shall be fully equipped with ammeter, voltmeter, MW and MVAr meters etc. as per the technical specifications.

•

Existing Panel Transducers shall be replaced as applicable according to the enhancement of CT/VT etc.

•

New Annunciations shall be provided in the local control cabinet in bays at remote end substation.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Replacing existing labels by new labels

•

Replacement of existing 220kV CTs and VTs as detailed under protection scope of work hereunder.

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•

New Alarm facia equipment shall be installed on CP/RP to incorporate additional alarms locally as well as remote NCC/DGCC.

•

Re-commissioning and Re-calibration of Tariff meters at generating stations shall be envisaged as applicable if CT/VT capacities/ratios are changed.

•

SCS and Power Control: - Required modifications to existing conventional control panel to include changes on the 220kV feeders. - Required modifications in the existing SCS control panel to include changes on the 220kV feeders. - Required modification to TMMC/TDB/RTU to incorporate the changes on the 220kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained. Old and faulty transducers shall be replaced and all related testing shall be done. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS, conventional control panel and TMMC/TDB/RTU. - Existing BCUs shall be replaced to accommodate additional alarms.

•

Protection: - For the Cable feeders connected to New Typical Substation, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at remote end substation to match the new protection provided at 220kV New Typical Substation bays. Existing trip relays / TCS relays need to be replaced. - Remote end SLD to be incorporated in one of the 87C relay. - Existing VTs installed under Phase 3 or earlier projects shall be replaced with new three Phase, two core VTs. - Replacement of the existing CTs to meet with new cable feeder rating. The new CTs required parameters are given in Protection standard Specification and standard CT ratio. The new CTs’ construction and other dimensions shall be identical to the existing CTs so that it can be mounted in the limited space available in the indoor switchgear bay (Or Outdoor switchgear bays). The contractor shall be fully responsible for all associated works and required interfaces. Contractor has to perform proper CT sizing calculation for Kahramaa review. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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- All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

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PACKAGE S-13

3.13

3.13.1

132/11KV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11KV SWG) – 2 NOS The principal elements of new 132/11kV Framework TYPE A Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz double bus bar GIS consisting of following bays: - Two (2) Bus section bays, - Two (2) Bus coupler bays, - Six (6) cable feeder bays, - Four (4) 40MVA outgoing Transformer feeder bays - Space for four future bays, two on either side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV switchgear A: - Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear

•

11kV switchgear B: - Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear Alternatively 11kV GIS is also acceptable.

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Power Transformers, NER’s •

Four (4) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage.

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6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.
LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
132kV GIS & Fire Pump Room Crane
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

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•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.13.2

132/11KV FRAMEWORK TYPE B SUBSTATION (SINGLE 11KV SWG) – 2 NOS The principal elements of new 132/11kV Framework TYPE B Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz double bus bar GIS consisting of following bays: - Two (2) Bus section bays, - Two (2) Bus coupler bays, - Six (6) cable feeder bays, - Two (2) 40MVA outgoing Transformer feeder bays - Space for four future bays, two on either side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

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- Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear - Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System

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•

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
132kV GIS & Fire Pump Room Crane
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

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Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.13.3

132/11KV FRAMEWORK TYPE C SUBSTATION (SINGLE 11KV SWG) The principal elements of new 132/11kV Framework TYPE C Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz single bus bar GIS consisting of following bays:

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- One (1) Bus section bay, - Six (6) cable feeder bays, - Two (2) 40MVA outgoing Transformer feeder bays - Space for four future bays, two on either side of the switchgear •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear - Alternatively 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends

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(in line with remote end protection scope) shall be provided for feeders connected to remote end substation.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
132kV GIS & Fire Pump Room Cranes
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 GTC-735 SCOPE OF WORKS R0

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REMOTE END WORKS – TYPICAL The following remote end works shall be done in all types of remote end substations: •

Re-testing and re-commissioning of the existing GIS spare bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS scope All necessary co-ordination with the cable contractor for the termination of the EHV cables at both ends.

•

Other necessary works, depending of the substation built date, are divided into four categories (types) which are described below.


Remote End Modification - TYPE-1: Substations Built During Phase 8 and Later •

The spare bays at remote end Substations built under Phase 8 and later shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 132kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays.

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- Contractor has to do proper CT sizing calculation for Kahramaa review and Adequacy of existing CTs must be checked. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power Control Scope: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-2: Substations Built During Phase 7 •

The spare bays at remote end Substations built under Phase 7 shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 132kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be replaced to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. Replacement of the existing Trip relay and TCS Relay.

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- New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-3: Substations Built During Phase 5 & 6 and GTC/53 •

All the required modifications in the remote end substations built under Phase 5 & 6 and GTC 53 projects shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Re-testing and re-commissioning of the existing GIS/ Switchgear bays in service along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS/ Switchgear name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection:

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- The required modification works for protection systems is detailed under protection scope of work hereunder - For those 132kV Cable feeders connected to new typical substation S/S, complete functional protection system as per standard specification shall be provided. Existing trip relays / TCS relays need to be replaced. - New relays/equipment shall be installed at remote end substation to match the (new) protection at new typical substation end. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). Installation of additional CT core or changing of the existing CTs shall be the responsibility of the Contractor. Optional unit price for the (132kV GIS) CT replacement and all associated works shall be provided. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Existing BCUs shall be replaced to accommodate additional alarms.


Remote End Modification - TYPE-4: Substations Built During Phase 4 and Earlier •

All the required modifications in the remote end substations with indoor/ outdoor switchgear supplied under Phase 4 and earlier projects built in early 1980s shall be carried out under the present scope of work.

•

The contractor’s scope of work includes thorough checking and refurbishment of the existing equipment to deliver fully working system. For Control and Protection the contractor shall deliver new equipment as mentioned in the scope of work of the protection works. The scope of work shall include but not limited to the following:

•

Refurbishment of existing 132kV switchgear bays

•

Replacement of 132kV isolators, if required (to be quoted in price schedule as an optional item)

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•

The existing 132V control panels shall be modified as required to match with the new cable feeder MVA rating. The new control panels shall be fully equipped with ammeter, voltmeter, MW and MVAr meters etc. as per the technical specifications.

•

Existing Panel Transducers shall be replaced as applicable according to the enhancement of CT/VT etc.

•

New Annunciations shall be provided in the local control cabinet in bays at remote end substation.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Replacing existing labels by new labels

•

Replacement of existing 132kV CTs and VTs as detailed under protection scope of work hereunder.

•

New Alarm facia equipment shall be installed on CP/RP to incorporate additional alarms locally as well as remote NCC/DGCC.

•

Re-commissioning and Re-calibration of Tariff meters at generating stations shall be envisaged as applicable if CT/VT capacities/ratios are changed.

•

SCS and Power Control: - Required modifications to existing conventional control panel to include changes on the 132kV feeders. - Required modifications in the existing SCS control panel to include changes on the 132kV feeders. - Required modification to TMMC/TDB/RTU to incorporate the changes on the 132kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained. Old and faulty transducers shall be replaced and all related testing shall be done. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS, conventional control panel and TMMC/TDB/RTU. - Existing BCUs shall be replaced to accommodate additional alarms.

•

Protection: - For the Cable feeders connected to New Typical Substation, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at remote end substation to match

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the new protection provided at 132kV New Typical Substation bays. Existing trip relays / TCS relays need to be replaced. - Remote end SLD to be incorporated in one of the 87C relay. - Existing VTs installed under Phase 3 or earlier projects shall be replaced with new three Phase, two core VTs. - Replacement of the existing CTs to meet with new cable feeder rating. The new CTs required parameters are given in Protection standard Specification and standard CT ratio. The new CTs’ construction and other dimensions shall be identical to the existing CTs so that it can be mounted in the limited space available in the indoor switchgear bay (Or Outdoor switchgear bays). The contractor shall be fully responsible for all associated works and required interfaces. Contractor has to perform proper CT sizing calculation for Kahramaa review. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

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PACKAGE S-14

3.14

3.14.1

132/11KV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11KV SWG) – 2 NOS The principal elements of new 132/11kV Framework TYPE A Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz double bus bar GIS consisting of following bays: - Two (2) Bus section bays, - Two (2) Bus coupler bays, - Six (6) cable feeder bays, - Four (4) 40MVA outgoing Transformer feeder bays - Space for four future bays, two on either side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV switchgear A: - Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear

•

11kV switchgear B: - Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear Alternatively 11kV GIS is also acceptable.

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Power Transformers, NER’s •

Four (4) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage.

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6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.
LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
132kV GIS & Fire Pump Room Cranes
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shallbe considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

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•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.


Security Management System according to specification enclosed in section 3.3.15. 3.14.2

132/11KV FRAMEWORK TYPE B SUBSTATION (SINGLE 11KV SWG) – 2 NOS The principal elements of new 132/11kV Framework TYPE B Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz double bas bar GIS consisting of following bays: - Two (2) Bus section bays, - Two (2) Bus coupler bays, - Six (6) cable feeder bays, - Two (2) 40MVA outgoing Transformer feeder bays - Space for four future bays, two on either side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

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- Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear - Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System

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•

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
132kV GIS & Fire Pump Room Cranes
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.

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Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises..


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.14.3

132/11KV FRAMEWORK TYPE C SUBSTATION (SINGLE 11KV SWG) The principal elements of new 132/11kV Framework TYPE C Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 132kV, 3150A @ 40˚C, 40kA / 1 sec, 3-phase, 50Hz single bus bar GIS consisting of following bays:

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- One (1) Bus section bay, - Six (6) cable feeder bays, - Two (2) 40MVA outgoing Transformer feeder bays - Space for four future bays, two on either side of the switchgear •

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: - Two (2) Nos. incomers rated 2500A - One (1) No. bus section bay rated 2500A - Eighteen (18) Nos. Bays for outgoing feeders rated 630A - Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers - Two (2) Nos. Bays for future capacitor banks feeders - Space for four future bays, two on either side of the switchgear - Alternatively 11kV GIS is also acceptable.


Power Transformers, NER’s •

Two (2) Nos. Power Transformers 132/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 132/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends

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(in line with remote end protection scope) shall be provided for feeders connected to remote end substation.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

132kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
132kV GIS & Fire Pump Room Cranes
Power cables •

132kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 132kV GIS and 132/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 132/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 132/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

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•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 GTC-735 SCOPE OF WORKS R0

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REMOTE END WORKS – TYPICAL The following remote end works shall be done in all types of remote end substations: •

Re-testing and re-commissioning of the existing GIS spare bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS scope All necessary co-ordination with the cable contractor for the termination of the EHV cables at both ends.

•

Other necessary works, depending of the substation built date, are divided into four categories (types) which are described below.


Remote End Modification - TYPE-1: Substations Built During Phase 8 and Later •

The spare bays at remote end Substations built under Phase 8 and later shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 132kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays.

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- Contractor has to do proper CT sizing calculation for Kahramaa review and Adequacy of existing CTs must be checked. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power Control Scope: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-2: Substations Built During Phase 7 •

The spare bays at remote end Substations built under Phase 7 shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 132kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be replaced to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. Replacement of the existing Trip relay and TCS Relay.

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- New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-3: Substations Built During Phase 5 & 6 and GTC/53 •

All the required modifications in the remote end substations built under Phase 5 & 6 and GTC 53 projects shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Re-testing and re-commissioning of the existing GIS/ Switchgear bays in service along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS/ Switchgear name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection:

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- The required modification works for protection systems is detailed under protection scope of work hereunder - For those 132kV Cable feeders connected to new typical substation S/S, complete functional protection system as per standard specification shall be provided. Existing trip relays / TCS relays need to be replaced. - New relays/equipment shall be installed at remote end substation to match the (new) protection at new typical substation end. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). Installation of additional CT core or changing of the existing CTs shall be the responsibility of the Contractor. Optional unit price for the (132kV GIS) CT replacement and all associated works shall be provided. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Existing BCUs shall be replaced to accommodate additional alarms.


Remote End Modification - TYPE-4: Substations Built During Phase 4 and Earlier •

All the required modifications in the remote end substations with indoor/ outdoor switchgear supplied under Phase 4 and earlier projects built in early 1980s shall be carried out under the present scope of work.

•

The contractor’s scope of work includes thorough checking and refurbishment of the existing equipment to deliver fully working system. For Control and Protection the contractor shall deliver new equipment as mentioned in the scope of work of the protection works. The scope of work shall include but not limited to the following:

•

Refurbishment of existing 132kV switchgear bays

•

Replacement of 132kV isolators, if required (to be quoted in price schedule as an optional item)

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•

The existing 132V control panels shall be modified as required to match with the new cable feeder MVA rating. The new control panels shall be fully equipped with ammeter, voltmeter, MW and MVAr meters etc. as per the technical specifications.

•

Existing Panel Transducers shall be replaced as applicable according to the enhancement of CT/VT etc.

•

New Annunciations shall be provided in the local control cabinet in bays at remote end substation.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Replacing existing labels by new labels

•

Replacement of existing 132kV CTs and VTs as detailed under protection scope of work hereunder.

•

New Alarm facia equipment shall be installed on CP/RP to incorporate additional alarms locally as well as remote NCC/DGCC.

•

Re-commissioning and Re-calibration of Tariff meters at generating stations shall be envisaged as applicable if CT/VT capacities/ratios are changed.

•

SCS and Power Control: - Required modifications to existing conventional control panel to include changes on the 132kV feeders. - Required modifications in the existing SCS control panel to include changes on the 132kV feeders. - Required modification to TMMC/TDB/RTU to incorporate the changes on the 132kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained. Old and faulty transducers shall be replaced and all related testing shall be done. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS, conventional control panel and TMMC/TDB/RTU. - Existing BCUs shall be replaced to accommodate additional alarms.

•

Protection: - For the Cable feeders connected to New Typical Substation, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at remote end substation to match

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the new protection provided at 132kV New Typical Substation bays. Existing trip relays / TCS relays need to be replaced. - Remote end SLD to be incorporated in one of the 87C relay. - Existing VTs installed under Phase 3 or earlier projects shall be replaced with new three Phase, two core VTs. - Replacement of the existing CTs to meet with new cable feeder rating. The new CTs required parameters are given in Protection standard Specification and standard CT ratio. The new CTs’ construction and other dimensions shall be identical to the existing CTs so that it can be mounted in the limited space available in the indoor switchgear bay (Or Outdoor switchgear bays). The contractor shall be fully responsible for all associated works and required interfaces. Contractor has to perform proper CT sizing calculation for Kahramaa review. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

PACKAGE – S15

3.15

3.15.1

66/11KV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11KV SWG) – 2 NOS The principal elements of 66/11kV TYPE A Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Four (4) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

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•

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11kV Switchgear A: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the switchgear

Alternatively 11kV GIS is also acceptable. •

11kV Switchgear B: -

Two (2) Nos. Incomers rated 2500A

-

One (1) No. Bus section bays rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc.

The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval. GTC-735 SCOPE OF WORKS R0

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Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire pump Room Cranes
66kV GIS Room Crane
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

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•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank. GTC-735 SCOPE OF WORKS R0

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All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.15.2

66/11KV FRAMEWORK TYPE B SUBSTATION (SINGLE 11KV SWG) – 2 NOS The principal elements of 66/11kV TYPE B Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

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•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment

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LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

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•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.15.3

66/11KV FRAMEWORK TYPE C SUBSTATION (SINGLE 11KV SWG) The principal elements of 66/11kV TYPE C Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: -

One (1) Bus section bay,

-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

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Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor.

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2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.
LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS Room & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the

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Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future). •

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.15.4

REMOTE END WORKS – TYPICAL The following remote end works shall be done in all types of remote end substations: •

Re-testing and re-commissioning of the existing GIS spare bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement.

•

All necessary co-ordination with the cable contractor for the termination of the EHV cables at both ends.

•

Other necessary works, depending of the substation built date, are divided into four categories (types) which are described below.

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Remote End Modification - TYPE-1: Substations Built During Phase 8 and Later •

The spare bays at remote end Substations built under Phase 8 and later shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 66kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing.

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- Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.
Remote End Modification - TYPE-2: Substations Built During Phase 7 •

The spare bays at remote end Substations built under Phase 7 shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 66kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control Scope for remote end modification:

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- Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.
Remote End Modification - TYPE-3: Substations Built During Phase 5 & 6 and GTC/53 •

All the required modifications in the remote end substations built under Phase 5 & 6 and GTC 53 projects shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Re-testing and re-commissioning of the existing GIS/ Switchgear bays in service along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS/ Switchgear name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection scope for remote end modification: - The required modification works for protection systems is detailed under protection scope of work hereunder - For those 66kV Cable feeders connected to new typical substation S/S, complete functional protection system as per standard specification shall be provided. Existing trip relays / TCS relays need to be replaced. - New relays/equipment shall be installed at remote end substation to match the (new) protection at new typical substation end. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement.

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- All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power Control Scope for remote end modification: - Required modifications to existing SCS to include changes on the 66kV feeders in the SCS and S/S works necessary for NCC/ENCC End – to – End testing. - Existing BCUs shall be replaced to accommodate additional alarms. - Alarms no more required shall be deleted and those related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC


Remote End Modification - TYPE-4: Substations Built During Phase 4 and Earlier •

All the required modifications in the remote end substations with indoor/ outdoor switchgear supplied under Phase 4 and earlier projects built in early 1980s shall be carried out under the present scope of work.

•

The contractor’s scope of work includes thorough checking and refurbishment of the existing equipment to deliver fully working system. For Control and Protection the contractor shall deliver new equipment as mentioned in the scope of work of the protection works. The scope of work shall include but not limited to the following:

•

Refurbishment of existing 66kV switchgear bays

•

Replacement of 66kV isolators, if required (to be quoted in price schedule as an optional item)

•

The existing 66V control panels shall be modified as required to match with the new cable feeder MVA rating. The new control panels shall be fully equipped with ammeter, voltmeter, MW and MVAr meters etc. as per the technical specifications.

•

Existing Panel Transducers shall be replaced as applicable according to the enhancement of CT/VT etc.

•

New Annunciations shall be provided in the local control cabinet in bays at remote end substation.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Replacing existing labels by new labels

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•

Replacement of existing 66kV CTs and VTs as detailed under protection scope of work hereunder.

•

New Alarm facia equipment shall be installed on CP/RP to incorporate additional alarms locally as well as remote NCC/DGCC.

•

Re-commissioning and Re-calibration of Tariff meters at generating stations shall be envisaged as applicable if CT/VT capacities/ratios are changed.

•

SCS and Power Control: - Required modifications in the existing SCS to include changes related to 66kV feeders. - Required modifications in the existing conventional control panel to include changes on the 66kV feeders. - Required modification to TMMC/TDB/RTU to incorporate the changes on the 66kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained. Old transducers shall be replaced and necessary testing shall be carried out. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS, conventional control panel and TMMC/TDB/RTU. - Existing BCUs shall be replaced to accommodate additional alarms.

•

Protection: - For the Cable feeders connected to New Typical Substation, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at remote end substation to match the new protection provided at 66kV New Typical Substation bays. Existing trip relays / TCS relays need to be replaced. - Remote end SLD to be incorporated in one of the 87C relay. - Existing VTs installed under Phase 3 or earlier projects shall be replaced with new three Phase, two core VTs. - Replacement of the existing CTs to meet with new cable feeder rating. The new CTs required parameters are given in Protection standard Specification and standard CT ratio. The new CTs’ construction and other dimensions shall be identical to the existing CTs so that it can be mounted in the limited space available in the indoor switchgear bay (Or Outdoor switchgear bays). The contractor shall be fully responsible for all associated works and required interfaces. Contractor has to perform proper CT sizing calculation for Kahramaa review. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar

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protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

PACKAGE – S16

3.16

3.16.1

66/11KV FRAMEWORK TYPE A SUBSTATION (DOUBLE 11KV SWG) – 2 NOS The principal elements of 66/11kV TYPE A Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Four (4) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable. •

11kV Switchgear B: -

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-

One (1) No. Bus section bays rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

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32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

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•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15

3.16.2

66/11KV FRAMEWORK TYPE B SUBSTATION (SINGLE 11KV SWG) – 2 NOS The principal elements of 66/11kV TYPE B Substations shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

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-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc.

The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.
Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection

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SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

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•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.

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Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.16.3

66/11KV FRAMEWORK TYPE C SUBSTATION (SINGLE 11KV SWG) The principal elements of 66/11kV TYPE C Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, single bus bar GIS consisting of following bays: -

One (1) Bus section bay,

-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 7. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 8. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 9. Provision to install moisture sensor. 10. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 11. Sensor for Transformer Load Current and voltage. 12. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes GTC-735 SCOPE OF WORKS R0

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Power cables •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable

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openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings. •

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.16.4

REMOTE END WORKS – TYPICAL The following remote end works shall be done in all types of remote end substations: •

Re-testing and re-commissioning of the existing GIS spare bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS scope All necessary co-ordination with the cable contractor for the termination of the EHV cables at both ends.

•

Other necessary works, depending of the substation built date, are divided into four categories (types) which are described below.


Remote End Modification - TYPE-1: Substations Built During Phase 8 and Later •

The spare bays at remote end Substations built under Phase 8 and later shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

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Protection: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 66kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-2: Substations Built During Phase 7 •

The spare bays at remote end Substations built under Phase 7 shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

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•

Protection systems as detailed under protection scope of work hereunder.

•

Protection: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 66kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-3: Substations Built During Phase 5 & 6 and GTC/53 •

All the required modifications in the remote end substations built under Phase 5 & 6 and GTC 53 projects shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Re-testing and re-commissioning of the existing GIS/ Switchgear bays in service along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS/ Switchgear name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

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•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection: - The required modification works for protection systems is detailed under protection scope of work hereunder - For those 66kV Cable feeders connected to new typical substation S/S, complete functional protection system as per standard specification shall be provided. Existing trip relays / TCS relays need to be replaced. - New relays/equipment shall be installed at remote end substation to match the (new) protection at new typical substation end. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on the 66kV feeders in the SCS and S/S works necessary for NCC/ENCC End – to – End testing. - Existing BCUs shall be replaced to accommodate additional alarms. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-4: Substations Built During Phase 4 and Earlier •

All the required modifications in the remote end substations with indoor/ outdoor switchgear supplied under Phase 4 and earlier projects built in early 1980s shall be carried out under the present scope of work.

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•

The contractor’s scope of work includes thorough checking and refurbishment of the existing equipment to deliver fully working system. For Control and Protection the contractor shall deliver new equipment as mentioned in the scope of work of the protection works. The scope of work shall include but not limited to the following:

•

Refurbishment of existing 66kV switchgear bays

•

Replacement of 66kV isolators, if required (to be quoted in price schedule as an optional item)

•

The existing 66V control panels shall be modified as required to match with the new cable feeder MVA rating. The new control panels shall be fully equipped with ammeter, voltmeter, MW and MVAr meters etc. as per the technical specifications.

•

Existing Panel Transducers shall be replaced as applicable according to the enhancement of CT/VT etc.

•

New Annunciations shall be provided in the local control cabinet in bays at remote end substation.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Replacing existing labels by new labels

•

Replacement of existing 66kV CTs and VTs as detailed under protection scope of work hereunder. Contractor has to do proper CT sizing calculation. CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

New Alarm facia equipment shall be installed on CP/RP to incorporate additional alarms locally as well as remote NCC/DGCC.

•

Re-commissioning and Re-calibration of Tariff meters at generating stations shall be envisaged as applicable if CT/VT capacities/ratios are changed.

•

SCS and Power Control: - Required modifications in the existing SCS to include changes related to 66kV feeders. - Required modifications in the existing conventional control panel to include changes on the 66kV feeders. - Required modification to TMMC/TDB/RTU to incorporate the changes on the 66kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained. Old and faulty transducers shall be replaced and all related testing shall be done.

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- Existing BCUs shall be replaced to accommodate additional alarms. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS, conventional control panel and TMMC/TDB/RTU. •

Protection: - For the Cable feeders connected to New Typical Substation, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at remote end substation to match the new protection provided at 66kV New Typical Substation bays. Existing trip relays / TCS relays need to be replaced. - Remote end SLD to be incorporated in one of the 87C relay. - Existing VTs installed under Phase 3 or earlier projects shall be replaced with new three Phase, two core VTs. - Replacement of the existing CTs to meet with new cable feeder rating. The new CTs required parameters are given in Protection standard Specification and standard CT ratio. The new CTs’ construction and other dimensions shall be identical to the existing CTs so that it can be mounted in the limited space available in the indoor switchgear bay (Or Outdoor switchgear bays). The contractor shall be fully responsible for all associated works and required interfaces. Contractor has to perform proper CT sizing calculation for Kahramaa review. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

PACKAGE – S17

3.17

3.17.1

66/11KV FRAMEWORK TYPE A SUBSTATION (CONVENTIONAL, DOUBLE 11KV SWG – CIVIL WORKS DONE BY DEVELOPER) 66/11kV Framework is conventional substation that shall be constructed to meet the Power supply requirements of the future development project. Civil works for the substation buildings will be undertaken by Developer. Roles and responsibility matrix for the scope of works of EPC contractor and the Developer shall be developed before project execution. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors. Interface between EPC Contractor and civil design team of developer will be required in the early stage of the project, to ensure that any specific requirements are defined and

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integrated in construction works in due time. High level of coordination between developer and substation Contractor will be required during the complete construction period. The principal elements of 66/11kV TYPE A Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Four (4) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable. •

11kV Switchgear B: -

Two (2) Nos. Incomers rated 2500A

-

One (1) No. Bus section bays rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable. GTC-735 SCOPE OF WORKS R0

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Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends shall be provided for feeders connected to remote end substation.

•

Metering system: Tariff meters shall be provided on the 11kV sides of 40MVA Power Transformers. Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

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32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

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•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
Civil works and building services for the substation buildings will be undertaken by Developer. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors.
Security Management System according to specification enclosed in section 3.3.15
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings. 3.17.2

66/11KV FRAMEWORK TYPE B SUBSTATION (CONVENTIONAL, SINGLE 11KV SWG - CIVIL WORKS DONE BY DEVELOPER) 66/11kV Framework is conventional substation that shall be constructed to meet the Power supply requirements of the future development project. Civil works for the substation buildings will be undertaken by Developer. Roles and responsibility matrix for the scope of works of EPC contractor and the Developer shall be developed before project execution. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors.

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Interface between EPC Contractor and civil design team of developer will be required in the early stage of the project, to ensure that any specific requirements are defined and integrated in construction works in due time. High level of coordination between developer and substation Contractor will be required during the complete construction period. The principal elements of 66/11kV TYPE B Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

•

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Dyn1 ONAN/ONAF cooling, +5% -15% on load taps in steps of 1.25%, 13.6% impedance on ONAN provided with AVR, terminal CTs, neutral CTs etc.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

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Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc.

The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.
Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.

•

Metering system: Tariff meters shall be provided on the 11kV sides of 40MVA Power Transformers. Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

66kV GIS shall be equipped with the internal UHF couplers so the retrofitting can be easily done in the future (sensor location shall be done as per Specification for PDM)

•

32/40MVA Transformers shall have all provisions as mentioned in the TMS specification so the retrofitting can be easily done in the future. Some are listed as below: 1. Dedicated Inlet and Outlet connections to connect multigas DGA sensor. 2. Provision to install additional Probes (Pt100) for Main Tank Top Oil Temp, OLTC oil temperature, Cooler inlet and outlet temperature, Oil pressure. 3. Provision to install moisture sensor. 4. Sensors (Transducers) for Main Tank Conservator Oil level, OLTC Oil level and OLTC tap position. 5. Sensor for Transformer Load Current and voltage. 6. Spare aux contacts in the cooling unit (fans/pumps) to obtain its operating status. Access to bushing taps for PD measurement.

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LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Provision for future expansion / interfacing with Transformer Explosion Prevention System shall be considered by providing necessary connection points at the Transformers. All Transformers shall be manufactured with the necessary provision of connection points for installation of TEP System (if Kahramaa decides to adopt this system – in future).

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

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TECHNICAL AFFAIRS Electricity Projects Dept.

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•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
Civil works and building services for the substation buildings will be undertaken by Developer. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors.
Security Management System according to specification enclosed in section 3.3.15
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings. 3.17.3

66/11KV FRAMEWORK UNDERGROUND TYPE A SUBSTATION (DOUBLE 11KV SWG – CIVIL WORKS DONE BY DEVELOPER) 66/11kV underground Framework substation shall be constructed to meet the Power supply requirements of the future development project. Civil works for the substation buildings will be undertaken by Developer. Roles and responsibility matrix for the scope of works of EPC contractor and the Developer shall be developed before project execution. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors. Interface between EPC Contractor and civil design team of developer will be required in the early stage of the project, to ensure that any specific requirements are defined and integrated in construction works in due time. High level of coordination between developer and substation Contractor will be required during the complete construction period. The principal elements of 66/11kV TYPE A Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

GTC-735 SCOPE OF WORKS R0

Two (2) Bus section bays, TECHNICAL AFFAIRS Electricity Projects Dept.

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-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Four (4) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable. •

11kV Switchgear B: -

Two (2) Nos. Incomers rated 2500A

-

One (1) No. Bus section bays rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Vector group of Dyn1, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance at ONAN, AVR, neutral CTs, etc. Due to absence of natural ventilation, substation Contractor is obliged to perform detailed study of ventilation requirements and coordinate design for the same with civil Contractor. Preferred are Transformers with standard, ONAN / ONAF, cooling system and with FO winding temperature monitoring which should be offered as optional item. Optionally, gas insulated Transformer may be proposed. Bidders should include in their technical offer

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detailed specification of the proposed cooling system and special construction requirements for the same, if any. •

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. Consider rated Power and indoor installation environment, Bidder may propose dry type Transformers. This needs to be clearly indicated in the Technical Data Sheets. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends shall be provided for feeders connected to remote end substation.

•

Metering system: Tariff meters shall be provided on the 11kV sides of 40MVA Power Transformers. Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

Partial discharge monitoring system for 66kV GIS

•

Condition monitoring system for 40MVA Transformers

•

Integrated HMI workstation for monitoring system

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Necessary LAN & WAN equipment including router/firewall for connection to remote end


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Transformer Explosion Prevention System for Power Transformers.

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

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•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
Civil works and building services for the substation buildings will be undertaken by Developer. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors.
Security Management System according to specification enclosed in section 3.3.15
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings. 3.17.4

66/11KV FRAMEWORK UNDERGROUND TYPE B SUBSTATION (SINGLE 11KV SWG - CIVIL WORKS DONE BY DEVELOPER) 66/11kV underground Framework substation shall be constructed to meet the Power supply requirements of the future development project. Civil works for the substation buildings will be undertaken by Developer. Roles and responsibility matrix for the scope of works of EPC contractor and the Developer shall be developed before project execution. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors. Interface between EPC Contractor and civil design team of developer will be required in the early stage of the project, to ensure that any specific requirements are defined and integrated in construction works in due time. High level of coordination between developer and substation Contractor will be required during the complete construction period. The principal elements of 66/11kV TYPE B Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

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-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Vector group of Dyn1, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance at ONAN, AVR, neutral CTs, etc. Due to absence of natural ventilation, substation Contractor is obliged to perform detailed study of ventilation requirements and coordinate design for the same with civil Contractor. Preferred are Transformers with standard, ONAN / ONAF, cooling system and with FO winding temperature monitoring which should be offered as optional item. Optionally, gas insulated Transformer may be proposed. Bidders should include in their technical offer detailed specification of the proposed cooling system and special construction requirements for the same, if any.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. Consider rated Power and indoor installation environment, Bidder may propose dry type Transformers. This needs to be clearly indicated in the Technical Data Sheets.

The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station

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load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.
Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.

•

Metering system: Tariff meters shall be provided on the 11kV sides of 40MVA Power Transformers. Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

Partial discharge monitoring system for 66kV GIS

•

Condition monitoring system for 40MVA Transformers

•

Integrated HMI workstation for monitoring system

•

Necessary LAN & WAN equipment including router/firewall for connection to remote end


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
66kV GIS & Fire Pump Room Cranes
Earthing & Lightning Protection
Power cables

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•

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Transformer Explosion Prevention System for the Power Transformers.

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


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Civil works and building services for the substation buildings will be undertaken by Developer. All necessary coordination with the Developer and their contractors shall be the responsibility of the substation contractors.
Security Management System according to specification enclosed in section 3.3.15 3.17.5

66/11KV FRAMEWORK (DOUBLE 11KV SWG)

UNDERGROUND

TYPE

A SUBSTATION

66/11kV underground Framework substation shall be constructed to meet the Power supply requirements of the future project. The principal elements of 66/11kV TYPE A Substation shall be as follows:
Gas Insulated/ Air Insulated Switchgear •

Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Four (4) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

•

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following:

•

11kV Switchgear A: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable. •

11kV Switchgear B: -

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-

One (1) No. Bus section bays rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space for four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Four (4) Nos. Power Transformers 66/11kV, 32/40MVA, Vector group of Dyn1, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance at ONAN, AVR, neutral CTs, etc. Due to absence of natural ventilation, substation Contractor is obliged to perform detailed study of ventilation requirements and coordinate design for the same with civil Contractor. Preferred are Transformers with standard, ONAN / ONAF, cooling system and with FO winding temperature monitoring which should be offered as optional item. Optionally, gas insulated Transformer may be proposed. Bidders should include in their technical offer detailed specification of the proposed cooling system and special construction requirements for the same, if any.

•

Four (4) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for four (4) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%, 5.45% impedance, neutral CTs, etc. Consider rated Power and indoor installation environment, Bidder may propose dry type Transformers. This needs to be clearly indicated in the Technical Data Sheets. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.


Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends shall be provided for feeders connected to remote end substation.

•

Metering system: Tariff meters shall be provided on the 11kV sides of 40MVA Power Transformers. Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in

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Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.
SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

Partial discharge monitoring system for 66kV GIS

•

Condition monitoring system for 40MVA Transformers

•

Integrated HMI workstation for monitoring system

•

Necessary LAN & WAN equipment including router/firewall for connection to remote end


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection
66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, quadruple circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, quadruple circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, four single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall,

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included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department.
Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Transformer Explosion Prevention System for Power Transformers.

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

•

Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.17.6

66/11KV FRAMEWORK (SINGLE 11KV SWG)

UNDERGROUND

TYPE

B

SUBSTATION

66/11kV underground Framework substation shall be constructed to meet the Power supply requirements of the future project. The principal elements of 66/11kV TYPE B Substation shall be as follows:
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•

•

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Establish 66kV, 2500A at 40˚C, 31.5kA / 1 sec, 3-phase, 50Hz, double bus bar GIS consisting of following bays: -

Two (2) Bus section bays,

-

Two (2) Bus coupler bays,

-

Six (6) Nos. Outgoing cable feeder bays

-

Two (2) Nos. 66/11 kV, 40MVA outgoing Transformer bays

-

Space for four future bays, two on each side of the switchgear

Establish 11kV, 2500A at 40˚C, 31.5kA / 3 sec, single bus bar metal enclosed switchgear with vacuum circuit breakers, consisting of the following: -

Two (2) Nos. incomers rated 2500A

-

One (1) No. bus section bay rated 2500A

-

Eighteen (18) Nos. Bays for outgoing feeders rated 630A

-

Two (2) Nos. Feeders for 11/0.415kV Auxiliary Transformers

-

Two (2) Nos. Bays for future capacitor banks feeders

-

Space four future bays, two on each side of the 11kV switchgear

Alternatively 11kV GIS is also acceptable.
Power Transformers, NER’s •

Two (2) Nos. Power Transformers 66/11kV, 32/40MVA, Vector group of Dyn1, OLTC with +5% to -15% in steps of 1.25%, 13.6% impedance at ONAN, AVR, neutral CTs, etc. Due to absence of natural ventilation, substation Contractor is obliged to perform detailed study of ventilation requirements and coordinate design for the same with civil Contractor. Preferred are Transformers with standard, ONAN / ONAF, cooling system and with FO winding temperature monitoring which should be offered as optional item. Optionally, gas insulated Transformer may be proposed. Bidders should include in their technical offer detailed specification of the proposed cooling system and special construction requirements for the same, if any.

•

Two (2) Nos. of 11kV Metallic Neutral Earthing Resistors 8.50 ohm at 50˚C rated for 750 A for 30 seconds (including NER monitoring system) for earthing the neutral of 66/11kV, 40MVA Power Transformer.

•

Space for two (2) future capacitor banks and space for vacuum contactor panels for the future capacitor banks shall be provided for in the substation layout.

•

Two (2) Nos. Auxiliary Transformers 11/0.415kV, 1000kVA, with ONAN cooling, Vector group of Dyn11, off load tap change with +5% to -5% in steps of 2.5%,

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5.45% impedance, neutral CTs, etc. Consider rated Power and indoor installation environment, Bidder may propose dry type Transformers. This needs to be clearly indicated in the Technical Data Sheets. The rated Power of the Auxiliary Transformer mentioned here is provisional. Transformers to be supplied shall be of adequate capacity to cater to the total station load with additional 30% margin. The capacity of the Transformer is to be justified by calculation note which shall be subject to approval.
Protection Systems •

Relay Protection Equipment for all Primary Equipment (all bays) as detailed in Main Scope of the Work shall be provided as per standard specification, Protection SLD and Technical Schedules. Relay and equipment compatible with remote ends (in line with remote end protection scope) shall be provided for feeders connected to remote end substation.

•

Metering system: Tariff meters shall be provided on the 11kV sides of 40MVA Power Transformers. Standard specification for the bulk consumers shall apply. Guidelines for Protection Energy Meter and System Control Requirements for Power Supply to Bulk Consumers are included in the technical specification in Volume 2 (along with the Scope of Works) as Annexures IV & V (ET-P26-G1, issue 4 14/5/2014 & ES-EST-P1-G1, issue 0 10/3/2014). Tariff meters shall be interfaced with SCS using communication protocol, preferable IEC61850, to enable signal transfer from tariff metering system to NCC.


SCS & Associated Equipment •

Substation Control System Including Gateway data mapping to NCC/ENCC/DCC and S/S works necessary for NCC/ENCC/DCC End – to – End testing.


Online Monitoring System •

Partial discharge monitoring system for 66kV GIS

•

Condition monitoring system for 40MVA Transformers

•

Integrated HMI workstation for monitoring system

•

Necessary LAN & WAN equipment including router/firewall for connection to remote end


LV Service Equipment
LV Power Cables, Control Cables with all accessories
Small Power & Lighting
Earthing & Lightning Protection

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66kV GIS & Fire Pump Room Cranes
Power cables •

66kV, 1x500mm2, XLPE, 40MVA, double circuit, solid bonded cable links between 66kV GIS and 66/11kV Power Transformers laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, 40MVA, double circuit, single point earthed with earth continuity conductor, four (4) cables per phase cable links between 66/11kV Power Transformers and 11kV switchgear, laid in unfilled concrete troughs with all accessories. Approx. route length: 50m.

•

11kV, 1x630mm2, XLPE, two single cable links between 66/11kV Power Transformers and 11kV NER. Approx. route length: 20m.

•

11kV, 1x500mm2, XLPE, 1000kVA, double circuit, solid bonded (one cable per phase) cable links between 11kV switchgear and 11/0.415, Auxiliary Transformers. Approx. route length: 50m.

•

11kV outgoing feeder Cables: Installation for 11kV outgoing cable feeders between 11kV SWG and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by Kahramaa. Contractor shall coordinate with concerned Kahramaa department


Fire Fighting System •

Deluge Water Spray System for Power Transformers & Auxiliary Transformers

•

Fire Pumping Station & Fire Water Tanks.

•

Transformer Explosion Prevention System for the Power Transformers.

•

Sprinkler System inside the Fire Pump Room.

•

Fire Detection & Alarm System for the GIS buildings, Transformer Yards (Power & Auxiliary), Control & Relay building and all other buildings.

•

FM200 System for the control & relay room, LVAC/DC Room.

•

Passive fire protection system – Cable Coating for all cables (EHV, HV, MV & LV including cable trays) for the entire length of the cable which includes also the substation cables and all cables inside the Cable basement of all buildings including 11kV outgoing feeders & incoming feeders.

•

Passive fire protection system – Fire Sealant material for all the MEP openings including HVAC & Fire/Smoke damper openings, floor openings such as panel openings including future openings, cable openings (spare/future) & all other cable openings such as substation cables, 11kV outgoing feeders and all cables inside the Cable basement of all buildings.

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Fire Extinguishers (Portable & Trolley Mounted) at designated areas inside the substation premises.


Underground Remote Oil Containment Tank.
All civil works related to new substation including building services.
Air-conditioning and ventilation systems to cover the GIS and Control & Relay buildings and all other buildings.
Security Management System according to specification enclosed in section 3.3.15 3.17.7

REMOTE END WORKS – TYPICAL The following remote end works shall be done in all types of remote end substations: •

Re-testing and re-commissioning of the existing GIS spare bays along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

•

Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement.

•

Alarms no more required shall be deleted and those related to modifications are to be included in the SCS scope All necessary co-ordination with the cable contractor for the termination of the EHV cables at both ends.

•

Other necessary works, depending of the substation built date, are divided into four categories (types) which are described below.


Remote End Modification - TYPE-1: Substations Built During Phase 8 and Later •

The spare bays at remote end Substations built under Phase 8 and later shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection:

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- For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 66kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope •

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-2: Substations Built During Phase 7 •

The spare bays at remote end Substations built under Phase 7 shall be used for establishing the above underground cable connections between the two substations. All the required modifications to the existing spare bays at remote end Super substations shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Contractor shall check suitability of the existing termination female part in GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

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Protection: - For Feeders to be connected to substation, the Bays will be equipped with Protection relays. - For those 66kV Cable feeders connected to new typical substation, complete functional protection system as per Standard specification shall be provided. The bays are fully equipped with protection relays/equipment. The 87C relays are to be upgraded to get Dual FO port communication wherever applicable as per latest Kahramaa specifications. - New relays/equipment shall be installed at the new substation to match the protection provided at respective Remote end substation bays. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct intertrip for breaker failure, gas pressure low and busbar protection operation to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on feeders in the SCS including Gateway data mapping to NCC/ENCC and S/S works necessary for NCC/ENCC End – to – End testing. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-3: Substations Built During Phase 5 & 6 and GTC/53 •

All the required modifications in the remote end substations built under Phase 5 & 6 and GTC 53 projects shall be carried out under the present scope of work. The scope of work shall include but not limited to the following:

•

Re-testing and re-commissioning of the existing GIS/ Switchgear bays in service along with Local Control Panels including indicating meters in the local control panels, inscription of additional alarm facia as required, replacing of GIS/ Switchgear name plates and any required works including, wiring, testing & complete re-commissioning of the above GIS bays.

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•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Protection systems as detailed under protection scope of work hereunder.

•

Protection: - The required modification works for protection systems is detailed under protection scope of work hereunder - For those 66kV Cable feeders connected to new typical substation S/S, complete functional protection system as per standard specification shall be provided. Existing trip relays / TCS relays need to be replaced. - New relays/equipment shall be installed at remote end substation to match the (new) protection at new typical substation end. - Contractor has to do proper CT sizing calculation and check the adequacy of existing CTs. If required, CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable). - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

•

SCS and Power Control: - Required modifications to existing SCS to include changes on the 66kV feeders in the SCS and S/S works necessary for NCC/ENCC End – to – End testing. - Existing BCUs shall be replaced to accommodate additional alarms. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS and S/S work necessary for remote signaling to NCC/ENCC.


Remote End Modification - TYPE-4: Substations Built During Phase 4 and Earlier •

All the required modifications in the remote end substations with indoor/ outdoor switchgear supplied under Phase 4 and earlier projects built in early 1980s shall be carried out under the present scope of work.

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•

The contractor’s scope of work includes thorough checking and refurbishment of the existing equipment to deliver fully working system. For Control and Protection the contractor shall deliver new equipment as mentioned in the scope of work of the protection works. The scope of work shall include but not limited to the following:

•

Refurbishment of existing 66kV switchgear bays

•

Replacement of 66kV isolators, if required (to be quoted in price schedule as an optional item)

•

The existing 66V control panels shall be modified as required to match with the new cable feeder MVA rating. The new control panels shall be fully equipped with ammeter, voltmeter, MW and MVAr meters etc. as per the technical specifications.

•

Existing Panel Transducers shall be replaced as applicable according to the enhancement of CT/VT etc.

•

New Annunciations shall be provided in the local control cabinet in bays at remote end substation.

•

Contractor shall check suitability of the existing termination female part in the GIS considering the size of incoming cables from new typical substation. If necessary, existing termination female parts shall be replaced by suitable one, including all necessary material and works required for such modification and optional price for the existing termination female part replacement and all associated works shall be provided.

•

Replacing existing labels by new labels

•

Replacement of existing 66kV CTs and VTs as detailed under protection scope of work hereunder. Contractor has to do proper CT sizing calculation. CTs shall be replaced (unit rates in Price Schedule 4.5 will be applicable).

•

New Alarm facia equipment shall be installed on CP/RP to incorporate additional alarms locally as well as remote NCC/DGCC.

•

Re-commissioning and Re-calibration of Tariff meters at generating stations shall be envisaged as applicable if CT/VT capacities/ratios are changed.

•

SCS and Power Control: - Required modifications in the existing SCS to include changes related to 66kV feeders. - Required modifications in the existing conventional control panel to include changes on the 66kV feeders. - Required modification to TMMC/TDB/RTU to incorporate the changes on the 66kV feeders in including NCC/ENCC end to end testing. The existing spare capacity in the RTU shall be maintained. Old and faulty transducers shall be replaced and all related testing shall be done.

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- Existing BCUs shall be replaced to accommodate additional alarms. - Alarms no more required shall be deleted and alarms related to modifications are to be included in the SCS, conventional control panel and TMMC/TDB/RTU. •

Protection: - For the Cable feeders connected to New Typical Substation, complete functional protection system as per standard specification shall be provided. The new relays/equipment shall be installed at remote end substation to match the new protection provided at 66kV New Typical Substation bays. Existing trip relays / TCS relays need to be replaced. - Remote end SLD to be incorporated in one of the 87C relay. - Existing VTs installed under Phase 3 or earlier projects shall be replaced with new three Phase, two core VTs. - Replacement of the existing CTs to meet with new cable feeder rating. The new CTs required parameters are given in Protection standard Specification and standard CT ratio. The new CTs’ construction and other dimensions shall be identical to the existing CTs so that it can be mounted in the limited space available in the indoor switchgear bay (Or Outdoor switchgear bays). The contractor shall be fully responsible for all associated works and required interfaces. Contractor has to perform proper CT sizing calculation for Kahramaa review. - Modification of the existing bus bar protection, including conducting bus bar stability and addition of modules if required shall be the responsibility of the Contractor. Direct inter-trip for breaker failure, gas pressure low and bus bar protection operation are to be made available between the stations based on requirement. - All modifications, testing and commissioning, relay setting calculations, relay testing on final setting, end to end test, overall stability etc. and putting into service is included in the Present Scope

PACKAGE S-18 TELECOMMUNICATION SYSTEM

3.18

3.18.1

INTRODUCTION The works under the subject project includes substation works for establishment of new transmission substation as well as modification of existing remote end transmission substation. This particular scope of works for telecommunication system must be read in conjunction with other items of the subject document to obtain all details of specified scope of works.

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SCOPE OF WORKS FOR SUBSTATIONS PACKAGE


DESCRIPTION OF WORKS The works and services to be performed by the Contractor shall comprise the design, manufacture, shop testing, packing, transport, insurance, unloading, storage at site, construction works, erection, corrosion protection, site testing, submission of documentation, commissioning, training of the Employer’s personnel and warranty of works. The Contractor is bound to provide complete works in order to provide a fully operational telecommunication system even if the equipment or services required for this are not specifically mentioned in the following description of the scope of works. The obligation of the Contractor is to fully inform himself about the existing telecommunication system and to provide all necessary new equipment, to make network modification by upgrade of existing Kahramaa’s telecommunication equipment, and/or by telecommunication system/network reconfiguration required for the connection of the new and refurbished substations, as per Drawing Ref. No. TED-PH13-TEL-001 – Rev. 0 Telecommunication Links Diagram, to existing Kahramaa Telecommunication Network/System. The Contractor shall make, based on Power Transmission Network and Fiber Optic Cables network availability, the best design for the telecommunication connection of new and refurbished/replaced S/Ss to Kahramaa Telecommunication Network/System. The proposed design shall be based on the Power Transmission Network and shall therefore consider necessary sizing of the Substations in terms of Optical Termination, Optical Transmission System and cross connection facilities for potential future expansion of the network. The Contractor shall meet listed substation’s commissioning dates and therefore shall establish telecom link to NCC/DCC/ENCC as required in order to allow energization of S/Ss. In case that approved design cannot be applied at S/S commissioning date because of FO links unavailability or any other reason, then the Contractor shall provide all necessary temporary set up in order to establish the link on Kahramaa request and after availability of the planned FO link the Contractor has to migrate to permanent link, as per approved design, from such established temporary links. Cost of such temporary or transitory works is assumed to be included in the contract price, and commissioning spares shall be considered as required. Also, all necessary activity and materials required and all coordination with concerned Kahramaa departments to shift telecom services during outage from outage circuit to operational circuit shall be provided by the Contractor. In case of refurbished/replaced S/S the Contractor is obliged, as mandatory, to maintain, in addition to services for the new S/S, all telecommunication services at existing substation until full power load is transferred to the new S/S.

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The final design for telecommunication equipment is subject to Kahramaa approval before manufacturing. Kahramaa shall receive a detailed design engineering of new and refurbished/replaced S/Ss interface to telecom network for review and approval. A Telecom Design Workshop is required after award of Contract to discuss the topology before submitting proposal to Kahramaa. The obligation of the Contractor is to conduct all necessary co-ordination and all necessary site survey in order to provide complete works for: •

Indoor fiber optic cables.

•

Termination equipment for fiber optic cables.

•

Required telecom services.

•

Substation layout for telecom panels.

•

Power supply and telephone connection to the MUX equipment.

Coordination shall be done with all Phase 13 Contractors (Substations and Cables) as well with other Kahramaa's Contractors which are currently active as follows: •

Phase 12 – Substation Contractors (GTC/643/2014), (GTC/642/2014) and OHL Contractors (GTC/641/2014).

•

Phase 12 – Telecom Contractors (GTC/643/2014).

•

Phase 11 – Substation Contractors (GTC/488/2012 B, C, D, F, G & GTC/679/2014) and Cable Contractors (GTC/450/2011 A, B, C, D, E, F, G, H, I, J).

•

Phase 11 – Telecom Contractors (GTC/488/2012E >C/488/2012H).

•

NCC/DCC modification Contractor.

•

Phase 10: Substation (GTC/372/2010 A; C).

•

Phase 10, Telecom Contractor (GTC/371/2010 E).

•

GTC/716/2014 - ESTABLISHMENT OF NEW DISTRIBUTION CONTROL CENTRE AND EXTENSION PROJECT

Contractor

GTC/371/2010,

Cable

Cable

Contractors

Contractors

The new fiber cables under this project are to be provided by the Substation Contractor/Cable Contractor and are 1 x 48 cores FO cable/OPGW associated with each new power cable/OHL. The brief Scope of Telecommunication Works includes the following:

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•

Connection of New Substations to the Kahramaa Telecommunication Network.

•

Connection of upgraded/replaced or modified substation by means of new telecommunication equipment and services to the Kahramaa Telecommunication Network.

•

Telecom Networks (ALSTOM & ABB networks) modification/re-configuration resulting of cable diversions, etc. and re-routing of all affected services. This also includes NMS modification, PAX modification (Alcatel), removal/addition of the alarms to SCADA, etc.

In case of modification of existing Kahramaa Telecom Network/telecom equipment, only original system supplier is acceptable to conduct these works and such works shall be subcontracted to the Original Telecom Equipment Supplier. To enable the connection of these Substations to the KahramaaTelecommunication Network, the following works shall be provided:

existing

•

Fiber optic indoor cables.

•

Fiber Optic Termination equipment FOPPs / OTPs.

•

SDH and PDH Equipment.

•

Telephone equipment (in ALSTOM and ABB Telecom networks).

•

All Kahramaa Telecommunication Management Systems modifications or upgrading resulting in modification of the Kahramaa Telecommunication Network.

•

Telecommunication power supply equipment.

•

Recovery of all services affected by the insertion of a new S/S in the network.

NOTE: For recovery of telecom services (in ALSTOM and ABB Telecom networks) due to cable diversions only original system supplier is acceptable to conduct these works and such works shall be subcontracted to the original Telecom Equipment Supplier directly, i.e. either to ALSTOM or to ABB, as the case may be. •

Works for telecommunication equipment dismantling.

•

Updating of all Existing Drawings and to update general documents such like routing tables, overall network, IP addresses list, etc.

The detailed technical requirement for telecommunication system is given under the General Technical Requirements and Technical Specifications in Volume 2 and Volume 3, Section 3.3.11 of GTC/735/2015, Tender Documents. In case if new telecommunication equipment is proposed by the Contractor at existing substation all modification works, necessary modifications in SCS/NCC for alarm signals from telecom equipment shall be arranged in coordination with S/S contractor, but in case GTC-735 SCOPE OF WORKS R0

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of works on telecom equipment at existing substation without substation modification works it is sole responsibility of Telecom Contractor for modification works in SCS/NCC for alarm signals from telecom equipment. •

The Contractor shall provide only new equipment and he is not allowed to re-use any of dismantled equipment. Re-use of dismantled equipment is allowed only in a case if official approval from Kahramaa is received.


SUMMARY SCOPE OF WORKS The Scope of Works as per Telecom Sections of Works i.e. milestones for this Contract is summarized as follows:
Works for Fiber Optical Indoor cables: Works for fiber optic indoor cables to connect optical transmission equipment (Protection, SDH or PDH equipment) to optical termination equipment (FOPP/OTP) at all stations.
Works for optical termination equipment Fiber Optic Patch Panels (FOPP) and Optical Termination Panel Cubicle (OTP) shall be supplied by telecom contractor. Works for laying, splicing, termination and End to End testing will be carried as follows. •

•

GTC/735/2015, Substation Contractor, is responsible: o

In case of Pilot Fiber Optic Cable laid along power cable inside substation (Supply/installation, termination, splicing at joint closures and OTP/OTB, including E2E test OTP/OTB - OTP/OTB) or in case of approach cable within substation area to cable compound (Supply/installation, termination, splicing at Hood Closure on Gantry and OTP/OTB, including E2E test OTP/OTB - OTP/OTB) as it has been listed under price schedule for substations package.

o

In case of OPGW (Supply/installation, installation splicing at OPGW Joint Closures, OPGW termination at Hood Closure with splicing, including E2E test Hood Closure - Hood Closure) as it has been listed under price schedule for substations package.

o

In case of FO cables between new substation building and existing substation building (Supply/installation, termination, splicing and End-toEnd test) as it has been listed under price schedule for substations package.

GTC/736/2015, Cable Contractor, is responsible in case of Pilot Fiber Optic Cable (Supply/installation, termination/splicing at OTP/OTB including E2E test OTP/OTB - OTP/OTB) as it has been listed under price schedule for cables package.


Works for SDH and PDH equipment

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The works required shall include all necessary works to include the new and refurbished/replaced/upgraded substations into the existing Kahramaa Telecommunication Network as per drawing ref. TED-PH13-TEL-001 – Rev. 0 Telecommunication Links Diagram, Technical Specification Section 3.3.11, and Appendix B – Price Schedule. The drawing TED-PH13-TEL-001– Rev. 0 Telecommunication Links Diagram indicates the connections between substations. For more details, the Contractor shall refer to Substations and Cables scope of works. All S/Ss with fiber optic cable terminated shall have multiplexer equipment with optical interface. The scope of work is summarized as follows: •

Establishment of dual SDH links STM-4 (400 kV and 220 kV substations shall have STM-4 equipment as minimum). Kahramaa shall receive a detailed design engineering of the telecom network for review and approval. A Telecom design workshop is required after the award of contract to discuss the topology before submission to Kahramaa.

•

Each new and refurbished/replaced/upgraded Substations require the following services to be transferred to NCC, ENCC and DCC: - Two PAX extensions one for NCC PAX and one for DCC PAX with respectively 3 telephones connected in parallel at the substation - Two IEC-104 64 kbps TCP/IP connections from SCS gateways to DCC (SCADA). - Two IEC-104 64 kbps TCP/IP connections from SCS gateways to NCC and switching to ENCC (SCADA).

NOTE: NCC/ENCC and DCC SCADA connections shall be fully segregated. •

4 Non SCADA channels as follows: - One Ethernet connection (2Mb/s minimum) to NCC for CMS. - Necessary connectivity to be provided for the channel to reach Kahramaa2 building using the existing link between NCC and Kahramaa2. - One Ethernet connection (2Mb/s minimum) to NCC for remote access to SCS LAN at substation (For Fault recorder, Parameter settings…). - One Ethernet connection connected to PMR file server at NCC and ENCC. - One Ethernet connection (2Mb/s minimum, bandwidth requirement to be coordinated with Substation Contractor) to NCC for CCTV. - Non SCADA channel bandwidth shall be coordinated with S/S Contractors.

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- All channels shall be segregated, and a mechanism shall be proposed to establish a 2 way communication between S/S and control centers and avoid communications between S/Ss. - Digital input alarm card with a minimum of 16 inputs. - Engineering order wire; maintenance service telephone at MUX level. Exact channel requirements depend on the Substation and SCS design. NOTE: Contractor shall closely coordinate with Substation Contractor and SCS supplier to meet any of his requirements with respect to communication channel to NCC, DCC and ENCC. •

Full works for Emergency switching to ENCC (Emergency National Control Centre).

•

Recovery of all services after the dismantling of any component or equipment or when diversions are made including removal of applicable alarms from NMS/SCADA.

•

Any equipment not running any services to be dismantled and delivered to Kahramaa.

•

Recovery of services and network re-configuration for all the S/S connected above a modified S/S in all affected Kahramaa Network.

•

All other necessary Extensions/modifications work in existing MUX equipment to connect the new substations to NCC, DCC, ENCC or any other substations.

•

All necessary works for migration of existing communication links and services to the new location at all refurbished/replaced substations.

•

Maintain 20% equipped spares or existing percentage of spares in case that less than 20% spares are available in the Kahramaa Telecommunication System at NCC/ENCC/DCC.

•

Since new Ethernet switch shall be provided in NCC to enable the PMR service. All necessary Works to shift the PMR server and existing link to new switches in coordination with SCS contractor.


Works for telephone equipment •

Works for telephone equipment at DCC telephone Exchanges and at NCC telephone Exchanges to interconnect two (2) extensions at each new substation. Extension shall be in 2 different cards, one each for NCC and DCC, in the MUX at substation side.

•

Providing minimum six executive tables/wall mounted Telephone sets at each station paralleled together (three to NCC and three to DCC) and all necessary works to connect to telecommunication equipment. Telephone sets are required to be installed in Control Room (2), LVAC/DC Room (1), Fire Pump House (1), each

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Switchgear Room (1) and Telecom room (1).Each switchgear room (11kV onwards) will have Telephone set, additional sets, other than six, shall be considered by the contractor. •

In underground stations, Telephone sets shall be provided in all rooms/basements, transformer areas, near each entrance on the ground floor. Two bells shall be provided in underground substations.

•

One unit 240 V AC outdoor bell for each new and refurbished/replaced substation and all necessary related works.

•

Work for PAX configuration (Alcatel) to fully interconnect the telecom network.

•

Maintain 20% spares or existing percentage of spares in case that less than 20% spares are available in the Kahramaa Telephone System at NCC/DCC (Alcatel). Additional hardware shall be provided, so as to maintain the spare capacity.


Works for Telecommunication Management System (TMS) •

All communication system shall be compatible with the existing NMS systems.

•

Works on existing Telecommunication Management Systems to include all new telecommunication Equipment (allowing equipment monitoring, reporting, controlling, configuring etc.).

•

All necessary outstation equipment to connect telecom 48VDC power supply (UPS at new and UPS or 48VDC at existing), Telecommunication Equipment alarms; TMS alarm list is to be approved by Kahramaa (16 digital inputs minimum).

•

Works shall include the Software and Hardware Modifications of one or more existing TMS System to connect the new Substations.

•

The NMS license should be upgraded for the required additional nodes keeping 20% spare.

•

Respective NMS modification resulting of Network modification or node cancellation.


Works for telecommunication power supply equipment •

The following to be included under telecom Contractors’ part:

•

Works for connection of new telecom equipment to 240 V AC UPS as per LV Service Equipment Volume 3, Section 3.3.5 of GTC/735/2015, Tender Documents, provision of power cables from UPS MCBs to Telecom equipment and provision of data cables between alarm terminal blocks at UPS and alarm terminals blocks at Telecom equipment. No 48VDC power supply is required at new substation.

•

All works for Telecom chargers and 48VDC Batteries at relative existing substations to accept new equipment or modifications/upgrading of existing

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equipment including, survey, calculations, connecting, documentation and DC distribution extensions etc. •

All works for 240VAC UPS and 110VDC Batteries at relative existing substations to accept new telecommunication equipment or modifications/upgrading of existing equipment including, survey, calculations, connecting, documentation and AC distribution extensions, etc.

•

The dismantled UPS, Batteries or Battery charger equipment shall be delivered to Kahramaa stores packed and labeled as per Kahramaa regulations.

•

240 VAC / 48 VDC converter shall be sized with enough spare power capacity for a fully equipped cabinet.


Works for Teleprotection Equipment Telecom contractor shall be responsible for: •

Dismantling of Teleprotection Equipment, as stated in detailed Scope of Work for individual substation.

•

All unused wiring related to Teleprotection Equipment shall be removed.

•

All alarms related to dismantled Teleprotection Equipment shall be removed from local SCS/NMS/SCADA.


Works for PLC Equipment Telecom contractor shall be responsible for: •

Dismantling of PLC equipment (and associated teleprotection equipment), as stated in detailed Scope of Work for individual substation.

•

All unused wiring related to PLC Equipment shall be removed.

•

All alarms related to dismantled PLC Equipment shall be removed from local SCS/NMS/SCADA.


Works for migration of existing telecom services at/or routed via refurbished / replaced substations. •

Recovery of telecom services affected by OHLs/power cables dismantling and/or connection's re-arrangement including Network optimization.

•

Updating of Existing Drawings.

•

Updating of all network drawings with the same existing format.


Master Drawing shall be delivered updating the entire network delivered by the Contractor during past projects (including bulk consumers) in editable format.

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This shall include but not limited to: •

Overall updated Network.

•

Digital Block Diagram.

•

Routing Table.

•

IP addresses.

•

NMS network (IP and scheme).

•

FO network and utilization.

•

Telephone network and numbering plan.

•

Updating of relevant existing sites (modified substations) drawings using same existing format (accessible format; PDF or locked formats are not acceptable).

•

Updating of All general documents such like routing tables, overall network, IP addresses list etc.


LIST OF NEW SUBSTATIONS The new Substations to be connected to the Kahramaa telecommunication network are as follows: Package

Name of substation Al Shahhaniyah Super - New 220/132/11kV

S-1

Al Shahhaniyah South - New 132/11kV Lebsayyer - New 132/11kV Doha Super (Upgrade) – 220/66/11 kV Al Waab Super (Upgrade) – 220/132/11 kV Umm Ebairiya - New 132/66/11kV

S-2

Umm Garn - New 132/11kV Umm Al Amad 1- New 66/11kV Umm Al Ghahab - Existing 66/11kV (Replacement) Abu Thailah (Upgrade) – 66/11 kV

S-3

Al Jahaniyah-2 - New 132/11kV Izghawa North - New 132/11kV

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Name of substation Wakrah 3 - New 132/11kV Mesaieed Ind A (Upgrade) – 132/11 kV

S-4

Bin Mahmoud North - New 66/11kV New Assiri - Existing 66/11kV (Replacement) Salwa Road - Existing 66/11kV (Replacement) Musherib - Existing 66/11kV (Replacement) Murrah South - New 66/11kV

S-5

Umm Al Seneem 2 - New 66/11kV Al Waab 2 - New 66/11kV Al Waab (Upgrade) – 66/11 kV

S-6

Ain Sinan - 132/11kV Jeryan Jenihat 1 - 132/11kV Museum Road - 66/11kV (Upgrade) Maither Central (Upgrade) – 132/66/11 kV

S-7

New Doha E - 66/11kV (Replacement) Salata - 66/11kV (Replacement) Mashaf 1 - New 132/11kV

S-8

Mashaf 2 - New 132/11kV Mashaf 3 - New 132/11kV Al Wukair 10 - New 132/11kV Al Wukair 6 - New 132/11kV

S-9

Al Wukair 7 - New 132/11kV Al Wukair 8 - New 132/11kV Al Wukair 9 - New 132/11kV Al Wukair 2 - New 132/11kV

S-10

Al Wukair 3 - New 132/11kV Al Wukair 4 - New 132/11kV Al Wukair 5 - New 132/11kV

S-11 GTC-735 SCOPE OF WORKS R0

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Name of substation Abu Hamour West - 66/11kV Luaib - 66/11kV Abu Samra (Upgrade) – 33/11 kV

Parallel running of both new and old telecom equipment will be required at above substations where (Upgrade) is notified. If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and network reconfigured. Scope of work includes necessary upgrade of remote end S/S to incorporate all the new S/S to the Kahramaa Telecommunication Network. Scope of work also includes recovery of all services at any existing S/S affected by the addition of a new S/S or the insertion between 2 or more S/Ss. The Contractor shall inform himself of Fiber Optic utilization and telecom network and to plan links accordingly. This includes patching, network reconfiguration or any other action.
WORKS AT EXISTING SUBSTATIONS Here below is an informative list of existing substations where modifications such as: Provision / Upgrade of OTP/FOPPs, works for interfacing of new substations with Kahramaa Telecom Network, necessary telecom routing of effected substations due to new cable line LILO, etc., respectively, shall be done.

Package

Name of substation 400/220/66/11kVUmm Al Amad Super

S-1

220/66/11kV Doha Super 220/132/66/11kV Naeeja Super 220/66/11kV Abu Hamour Super 220/66/11kV Doha South Super 400/220/66/11kV Al Sadd Super 220/132/11kV Al Thumamah 132/66/11kV Old Airport

S-2

GTC-735 SCOPE OF WORKS R0

400/132/11kV Al Sakhamah

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Name of substation 400/220/66/11kVUmm Al Amad Super 132/11kVSemaismah

S-3

220/132/66/11kVBani Hajer Super 132/11kVAl Jahhaniya 1 132/11kV Barzan Camp 1 220/132/66/11kVDoha North Super 132/11kV Ras Abu Fontas South 132/11kV QEZ 132/11kV Wakrah North

S-4

400/220/66kV Al Sadd Super

S-5

66/11kVDoha Industrial B 220/132/66/11kVDoha Industrial Super 66/11kVAin Khalid North 66/11kVVegetable Market 220/132/11kVMehairja Super 220/132/66/11kV Al Waab Super

S-6

132/11kV Madinat Al Kabaan 220/132/11kV Jeryan Jenaihat Super 132/11kV Al Khissa West 66/11kV Montazah North 66/11kV Old Ghanem

S-7

220/66/11kV West Bay Super 2 220/66/11kVNew Doha A Super

S-8

400/132/11kVBul Hemmaid 132/11kV Ras Abu Fontas South

S-9

400/132/11kVBul Hemmaid

S-10

132/11kV Al Wukair 1 132/11kV QEZ

S-11 GTC-735 SCOPE OF WORKS R0

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Name of substation 66/11kV Al Wadi West 220/132/11kVMehairja Super

At some of the existing substations it is necessary to do dismantling of existing equipment and to shift the same to Kahramaa store as per list below. Package

S-1

S-1

S-2

GTC-735 SCOPE OF WORKS R0

Name of substation

Scope of Works


Works for upgrade/replacement existing telecommunication equipment at Doha Super. Parallel running of both new and old telecom shall be required. If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and shifted to KM store.




Works for upgrade/replacement existing telecommunication equipment at Al Waab Super. Parallel running of both new and old telecom shall be required. If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and shifted to KM store.

•

Dismantling of PLC and associated Teleprotection equipment working over OHL Umm Salal - Umm Al Ghalab and shifting of the same to KM store, after packaging/labeling.

•

Works for removal of all applicable alarms from local SCS/NMS/SCADA and all other applicable places.

Doha Super (Upgrade) – 220/66/11 kV

Al Waab Super (Upgrade) – 220/132/11 kV

66/11kV Umm Al Ghahab (Replacement)

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Name of substation

REV. 0

Scope of Works


Works for upgrade/replacement existing telecommunication equipment at Abu Thailah. Parallel running of both new and old telecom shall be required. If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and shifted to KM store.

•

FOPP to be renamed. Necessary telecom routing of effected substations due to diversion of OHL Umm Salal Abu Thailah from Umm Salal S/S to Um Ebariya S/S. Dismantling of PLC and associated Teleprotection equipment working over OHL Umm Salal - Abu Thailah and shifting of the same to KM store, after packaging/labeling. Dismantling of TSTU working over OPGW and shifting of the same to KM store, after packaging/labeling. Works for removal of all applicable alarms from local SCS/NMS/SCADA and all other applicable places.

•

S-2

66/11kVAbu Thailah (Upgrade)

•

•

•

•

S-2

132/66/11kV Umm Salal

•

•

GTC-735 SCOPE OF WORKS R0

Dismantling of PLC and associated Teleprotection equipment working over OHL Umm Salal - Abu Thailah and shifting of the same to KM store, after packaging/labeling. Dismantling of TSTU equipment working over OPGW Umm SalalAbu Thailah and shifting of the same to KM store, after packaging/labeling. Dismantling of PLC and associated Teleprotection equipment working over OHL Umm Salal - Umm Al Ghalab and TECHNICAL AFFAIRS Electricity Projects Dept.

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Name of substation

REV. 0

Scope of Works

•

S-3

S-4

S-4

S-4

S-5

GTC-735 SCOPE OF WORKS R0




Dismantling of existing TSTU equipment at Mesaieed Ind A and associated substations (MIB and Qasco 1) as per agreed protection scheme, including removal of all accompanied patch cords, removal of applicable alarms from local SCS and control Centers.

•

Works for dismantling existing telecommunication equipment at New Assiri. Parallel running of both new and old telecom may be required during commissioning of substation.

•

Works for dismantling existing telecommunication equipment at Salwa Road. Parallel running of both new and old telecom may be required during commissioning of substation.

•

Works for dismantling existing telecommunication equipment at Musherib. Parallel running of both new and old telecom may be required during commissioning of substation.




Works for upgrade/replacement existing telecommunication equipment at Al Waab. Parallel running of both new and old telecom may be required during commissioning of

Mesaieed Ind A (Upgrade) – 132/11 kV

New Assiri - Existing 66/11kV (Replacement)

Salwa Road - Existing 66/11kV (Replacement)

Musherib - Existing 66/11kV (Replacement)

Al Waab (Upgrade) – 66/11 kV

shifting of the same to KM store, after packaging/labeling. Works for removal of all applicable alarms from local SCS/NMS/SCADA and all other applicable places.

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Package

Name of substation

REV. 0

Scope of Works substation. If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and shifted to KM store.


S-6

Museum Road - 66/11kV (Upgrade)

If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and shifted to KM store.


S-6

S-7

Maither Central (Upgrade) – 132/66/11 kV

Salata - 66/11kV (Replacement)

S-11

Abu Samra (Upgrade) –

GTC-735 SCOPE OF WORKS R0

Works for upgrade/replacement existing telecommunication equipment at Maither Central. Parallel running of both new and old telecom shall be required. If by substation contractors SCADA channels are shifted to new telecom, old telecom shall be dismantled and shifted to KM store.

•

Works for dismantling existing telecommunication equipment at New Doha E. Parallel running of both new and old telecom may be required during commissioning of substation.

•

Works for dismantling existing telecommunication equipment at Salata. Parallel running of both new and old telecom may be required during commissioning of substation.




Works for replacement existing telecommunication equipment at

New Doha E - 66/11kV (Replacement)

S-7

Works for upgrade/replacement existing telecommunication equipment at Museum Road. Parallel running of both new and old telecom shall be required.

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Package

Name of substation

REV. 0

Scope of Works

33/11 kV

Abu Samra. Parallel running of both new and old telecom may be required during commissioning of substation.


3.18.3

Dismantling of existing TSTU equipment at Abu Samra and associated substations as per agreed protection scheme, including removal of all accompanied patch cords, removal of applicable alarms from local SCS and control Centers.

SCOPE OF WORKS FOR FRAMEWORK CABLES / SUBSTATIONS


DESCRIPTION OF WORKS The Contractor is bound to provide complete works to provide fully operational telecommunication equipment at Framework S/S even if the equipment or services required for this are not specifically mentioned in the following description of the scope of works. The obligation of the Contractor is to fully inform himself about the existing Kahramaa Telecommunication Network/System and to provide all necessary new equipment, to make network modification by upgrade of the existing Kahramaa’s telecommunication equipment, and/or by telecommunication system/network reconfiguration required for connection of the new Framework S/S to existing Kahramaa Telecommunication Network/System. •

There will be two FO cables, each 48 cores, laid between Framework S/S and downstream/upstream S/S, to be provided under Cable Contractors (GTC/736/2015) and to be utilized for FO connectivity of Framework S/S to Kahramaa Telecommunication Network/System.

The Contractor shall make, based on Power Transmission Network and Fiber Optic Cables network availability, the best design for the telecommunication connection of Framework S/S to Kahramaa Telecommunication Network/System. In order to meet Framework S/S commissioning date the Contractor shall establish telecom link to NCC/ENCC/DCC as required in order to allow energization of Framework

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S/S. In case that approved design for telecommunication equipment cannot be applied at Framework S/S commissioning date because of Fiber Optic Cables unavailability or any other reason, then the Contractor shall provide all necessary temporary set up in order to establish the telecom link for Framework S/S on Kahramaa request without any additional cost impact and after Fiber Optic Cables availability of the planned FO link the Contractor has to migrate to permanent FO link, as per approved design, for such temporary established links. The final design for telecommunication equipment is subject to Kahramaa approval before manufacturing. Kahramaa shall receive a detailed design engineering of the Framework S/S interface to telecom network for review and approval. A Telecom design workshop is required after the award of contract to discuss the topology before submitting proposal to Kahramaa. The obligation of the Contractor is to conduct all necessary co-ordination and all necessary site survey in order to provide complete works for: •

Fiber optic connectivity of Framework S/S to Kahramaa Telecommunication Network/System via downstream/upstream S/S.

•

Required telecom services.

•

Substation layout for Telecom room for allocation of telecom panels.

•

Power supply and telephone connection to the MUX equipment.

The brief scope of works include the following:
Provision of OTP/FOPP for termination of fibre optic cables from Cables Contract Packages C-11; C-12; C-13 and C-14 – Framework for Cable Contractors (GTC/735/2015). •

Provision and installation of new telecommunication equipment at Framework S/S and wherever it is required as per approved design.

•

Connection of Framework S/S to existing Kahramaa telecom network. This includes all necessary modification/re-configuration on Existing Kahramaa Telecom Network(s) (ALSTOM & ABB Networks) required to enable this connection.

•

NMS modification, PAX modification (Alcatel), removal/addition of alarms to SCADA, etc. and re-routing of all affected services.

Only personnel, certified by ALSTOM / ABB and, approved by Kahramaa and in presence of Kahramaa’s staff, is allowed to work on existing telecom equipment belonging to respective telecom vendors (ALSTOM; ABB).or such works shall be subcontracted to the Telecom Equipment Supplier.

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The detailed technical requirement for new telecommunication equipment is given under the General Technical Requirements and Technical Specifications in Volume 2 and Volume 3, Section 3.3.11 of Tender Documents. The Scope of Works is summarized as follows: Works for Fiber Optical Indoor cables:




Works for fiber optic indoor cables to connect optical transmission equipment (SDH or PDH equipment) to optical termination equipment (FOPP/OTP/OTB). Works for Optical Termination Equipment




Fiber Optic Patch Panels (FOPP) and Optical Termination Panel Cubicle (OTP) required for Framework Cables as well as to be installed at Framework S/S. FO cables termination and E2E Tests of fiber optic cables shall be responsibility of the cable contractor. Works for SDH and PDH equipment




These works include connection of Framework substation into the existing Kahramaa Telecommunication Network as per Technical Specification Section 3.3.11, and Appendix B – Price Schedule. The following services are required to be transferred to NCC, ENCC and DCC for Framework substation: •

Establishment of dual SDH (or PDH) link for Framework S/S.

•

DCC network, if required, has to be fully independent from NCC/ENCC network (hardware and software wise).

•

Two PAX extensions one for NCC PAX and one for DCC PAX with respectively 3 and 3 telephones connected in parallel at the Framework S/S (Minimum six telephone sets and one outdoor bell). Telephone sets are required to be installed in Control Room (2), LVAC/DC Room (1), Fire Pump House (1), each Switchgear Room (1) and Telecom room (1).

•

Two IEC-104 64 kbps TCP/IP connections from SCS gateways to DCC (SCADA).

•

Two IEC-104 64 kbps TCP/IP connections from SCS gateways to NCC and switching to ENCC (SCADA).

•

One Ethernet connection (2Mb/s minimum) to NCC for TMS / RMS Monitoring System.

•

One Ethernet connection (2Mb/s minimum) to NCC for remote access to SCS LAN at substation (For Fault recorder, Parameter settings …).

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•

One Ethernet connection connected to PMR file server at NCC and ENCC.

•

One Ethernet connection (2Mb/s minimum) to NCC for CCTV.

•

Digital input alarm card with a minimum of 16 inputs.

•

Engineering order wire; maintenance service telephone at MUX level.

•

Connection to substation GPS for telecom equipment synchronization purpose.

•

Full works for Emergency switching to ENCC (Emergency National Control Centre).

•

Recovery of all services after the dismantling of any component or equipment or when diversions are made including removal of applicable alarms from NMS/SCADA.

•

Any equipment not running any services to be dismantled and delivered to Kahramaa.

•

All other necessary extensions/modifications work in existing MUX equipment to connect the new substation to NCC, DCC, ENCC or any other substations. The exact channel requirements for Framework substation depend on the Substation and SCS design. The Contractor shall closely internally coordinate with Telecom and Substation Sub Contractor and SCS supplier to meet any of his requirements with respect to communication channel to NCC, DCC and ENCC. Works for Telephone Equipment







REV. 0

•

Works for telephone equipment at DCC telephone Exchanges and at NCC telephone Exchanges to interconnect two (2) extensions at Framework S/S. Extension shall be in 2 different cards, one for NCC and another for DCC in the MUX at substation side.

•

Provision of six executive tables/wall mounted Telephone Sets at Framework S/S connected in parallel (three to NCC and three to DCC) and all necessary works to connect to telecommunication equipment.

•

Provision of one unit 240V AC outdoor bell at Framework S/S and all necessary related works.

•

Work for PAX configuration (Alcatel) to fully integrate PAX extensions/telephones located at Framework S/S.

•

Maintain 20% spares or existing % of spares in case that less than 20% spares are available in the Kahramaa Telephone System at NCC/DCC (Alcatel PAX).

Works for Telecommunication Management System (TMS)

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•

Works shall include the Software and Hardware Modifications of one or more existing Telecommunication Management (TMS) Systems to include all new telecommunication equipment at Framework S/S (allowing equipment monitoring, reporting, controlling, configuring etc.).

•

The NMS license should be upgraded for the required additional node(s) keeping 20% spare.

•

All communication system shall be compatible with the existing NMS systems.

•

Works on respective NMS modification resulting of network modification or node cancellation

•

All necessary outstation equipment to connect telecom 48VDC power supply (UPS at new and UPS or 48VDC at existing), telecommunication equipment alarms.

•

TMS alarm list is to be approved by Kahramaa (16 digital inputs minimum).

Works for Telecommunication Power Supply Equipment


•

Works for connection of new telecom equipment to 240V AC UPS as per LV Service Equipment Volume 3, Section 3.3.5 of Tender Documents, provision of power cables from UPS MCBs to Telecom equipment and provision of data cables between alarm terminal blocks at UPS and alarm terminals blocks at Telecom equipment. 240 VAC / 48 VDC converters shall be sized with enough spare power capacity for a fully equipped cabinet.

•

All works for Telecom chargers and 48VDC Batteries at relative existing substations to accept new telecommunication equipment, if any, or modifications/upgrading of existing equipment including, survey, calculations, connecting, documentation and DC distribution extensions etc.

•

All works for 240VAC UPS and 110VDC Batteries at relative existing substations to accept new telecommunication equipment, if any, or modifications/upgrading of existing equipment including, survey, calculations, connecting, documentation and AC distribution extensions etc. The dismantled UPS, Batteries or Battery charger equipment shall be delivered to Kahramaa stores packed and labeled as per Kahramaa regulations. Engineering works, updating of the existing drawings


•

Updating of all existing network drawings in the same existing format shall be done. This shall include but not limited to:

•

Overall updated Network.

•

Digital Block Diagram.

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•

Routing Table.

•

IP addresses.

•

NMS network (IP and scheme).

•

FO network and utilization.

•

Telephone network and numbering plan.

•

Updating of relevant existing sites (modified substations) drawings using same existing format (accessible format; PDF or locked formats are not acceptable).


LIST OF NEW FRAMEWORK CABLES / SUBSTATIONS The new Framework Cables / Substations to be connected to the Kahramaa Telecommunication Network are as follows: Cables: Package

Name of substation 132 kV – New Cables

C-11

132 kV – New Cables 132 kV – New Cables 132 kV – New Cables (LILO) 132 kV – New Cables 132 kV – New Cables

C-12 132 kV – New Cables 132 kV – New Cables (LILO) 66 kV – New Cables 66 kV – New Cables C-13 66 kV – New Cables 66 kV – New Cables (LILO) C-14

GTC-735 SCOPE OF WORKS R0

66 kV – New Cables

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Name of substation 66 kV – New Cables 66 kV – New Cables 66 kV – New Cables (LILO)

Substations: Package

S-12

Name of substation Framework Substation - New 220/66/11kV Framework Substation - New 220/132/11kV Framework Substation Type A-1 - New 132/11kV Framework Substation Type A-2 - New 132/11kV

S-13

Framework Substation Type B-1 - New 132/11kV Framework Substation Type B-2 - New 132/11kV Framework Substation Type C-1 - New 132/11kV Framework Substation Type A-1 - New 132/11kV Framework Substation Type A-2 - New 132/11kV

S-14

Framework Substation Type B-1 - New 132/11kV Framework Substation Type B-2 - New 132/11kV Framework Substation Type C-1 - New 132/11kV Framework Substation Type A-1 - New 66/11kV Framework Substation Type A-2 - New 66/11kV

S-15

Framework Substation Type B-1 - New 66/11kV Framework Substation Type B-2 - New 66/11kV Framework Substation Type C-1 - New 66/11kV Framework Substation Type A-1 - New 66/11kV

S-16

Framework Substation Type A-2 - New 66/11kV Framework Substation Type B-1 - New 66/11kV Framework Substation Type B-1 - New 66/11kV

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Package

REV. 0

Name of substation Framework Substation Type C-1 - New 66/11kV Framework Substation Type A/C - New 66/11kV Framework Substation Type A/U-1 - New 66/11kV

S-17

Framework Substation Type A/U-2 - New 66/11kV Framework Substation Type B/C - New 66/11kV Framework Substation Type B/U-1 - New 66/11kV Framework Substation Type B/U-2 - New 66/11kV

Scope of work includes necessary upgrade of remote end S/S to incorporate all the new S/S to the Kahramaa Telecommunication Network. Scope of work also includes recovery of all services at any existing S/S affected by the addition of a new S/S or the insertion between 2 or more S/Ss. The Contractor shall inform himself of Fiber Optic utilization and telecom network and to plan links accordingly. This includes patching, network reconfiguration or any other action. 3.18.4

OPTIONAL SCOPE OF WORK Optional scope of work includes provision of IP/MPLS and IP phones equipment to operate in Kahramaa communication network instead of PDH/SDH equipment and analog phones so the Contractor shall quote this equipment as indicated in Price Schedule. The Contractor shall coordinate with Contractor for Kahramaa Contract GTC/716/2014 ESTABLISHMENT OF NEW DISTRIBUTION CONTROL CENTRE AND EXTENSION PROJECT.

PACKAGE – S19

3.19

3.19.1

INSTALLATION OF CAPACITOR BANKS Kahramaa has made a study, which have shown necessity for installation of the new Capacitor banks at the existing 11kV switchgear of several primary substations. Some substations, built under recent Kahramaa projects like Phase 10 onward, are already equipped with the two (2) bays for capacitor bank per 11kV switchgear and the Space for capacitor banks along with space for vacuum contactor panels for the capacitor banks in the substation layout. Other substations are not equipped with the bays for capacitor banks on 11kV switchgear or with the space in the substation layout.

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Some of the substations are currently under construction and the proposed commissioning date for the capacitor banks shall match the substation commissioning should there be any unforeseen delays in the substation commissioning. Installation of the new Capacitor banks shall be as follows:
Gharafa 132/66/11kV S/S Gharafa is existing substation built under phase 4 and further upgraded by M/s L&T under Phase 10 project. Modification of the existing 132/66/11kV Gharafa substation shall be as follows: •

Install 4x11kV 6MVAr automatic shunt Capacitors utilizing the existing 11kV Capacitor banks bays;

•

Install vacuum contactor panels for the capacitor banks;

•

Space for the capacitor banks along with space for vacuum contactor panels for the capacitor banks is available in the substation layout. Isolation fence shall be modified to enable construction of the facilities.

•

All required civil works related to new building including building services.

•

11kV, 1x500mm2, XLPE, 6MVA, quadruple circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Required Modifications to SCS supplied by Siemens under Phase 10 project to include installation of capacitor banks in the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing.

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope.

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Naeeja West 132/66/11kV S/S Naeeja West is existing substation built under phase 9 project by M/s Siemens. Modification of the existing 132/66/11kV Naeeja West substation shall be as follows: •

Install 3x11kV 8MVAr automatic shunt Capacitors;

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•

Two (2) Nos. 11kV Bays for capacitor bank to be installed on spare space on 11kV Busbar 1 and Busbar 3;

•

Convert the existing 11kV cable feeder bay in Busbar 2 into Capacitor bank bay, including replacement of CTs;

•

Install one (1) 11kV cable feeder bay on spare space in Busbar 1 or 3;

•

Modification in Schematic Diagrams on 66/11kV Transformer Feeder 11kV Side of A18, A28 and A38 to provide CT inputs for capacitor bank control panel.

•

Modification in Schematic Diagrams on 11kV Bus VT-1, VT-2 and VT-3 to provide VT inputs for capacitor bank control panel.

•

Existing CTs (400/1A) shall be replaced with the new ones, as per the CT sizing calculation.

•

11kV, 1x500mm2, XLPE, 8MVA, triple circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Installation of one (1) 11kV outgoing cable feeder between new cable feeder bay and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by KAHRAMAA. Contractor shall coordinate with concerned KAHRAMAA department.

•

Space for the capacitor banks is available in the place of the old substation;

•

All required civil works related to new building including building services.

•

Installation of vacuum contactor panels for the capacitor banks;

•

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes on the 11kV switchgear and installation of capacitor banks in the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing;

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope;

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


SED 132/66/11kV S/S

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SED is existing substation built under phase 3 and further refurbished by M/s L&T under Phase 11 project. Modification of the existing 132/66/11kV SED substation shall be as follows: •

Install 4x11kV 6MVAr automatic shunt Capacitors utilizing the existing 11kV Capacitor banks bays;

•

Install vacuum contactor panels for the capacitor banks;

•

Space for the capacitor banks along with space for vacuum contactor panels for the capacitor banks is available in the substation layout.

•

All required civil works related to new building including building services.

•

11kV, 1x500mm2, XLPE, 6MVA, quadruple circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Required Modifications to SCS of ABB make supplied by L&T under Phase 11 project to include installation of capacitor banks to the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing.

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope.

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Asmakh 66/11kV S/S Asmakh is a new substation currently under construction on Phase 12 project. Modification of the existing 66/11kV Asmakh substation shall be as follows: •

Install 4x11kV 6MVAr automatic shunt Capacitors utilizing the existing 11kV Capacitor banks bays;

•

Install vacuum contactor panels for the capacitor banks;

•

Space for the capacitor banks along with space for vacuum contactor panels for the capacitor banks is available in the substation layout.

•

All required civil works related to new building including building services.

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•

11kV, 1x500mm2, XLPE, 6MVA, quadruple circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Required Modifications to SCS supplied under Phase 12 project to include installation of capacitor banks to the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing.

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope.

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Feriq Al Ameer 66/11kV S/S Feriq Al Ameer is existing substation built under phase 11 project by M/s NCC. Modification of the existing 66/11kV Feriq Al Ameer substation shall be as follows: •

Install 4x11kV 6MVAr automatic shunt Capacitors utilizing the existing 11kV Capacitor banks bays;

•

Install vacuum contactor panels for the capacitor banks;

•

Space for the capacitor banks along with space for vacuum contactor panels for the capacitor banks is available in the substation layout

•

All required civil works related to new building including building services.

•

11kV, 1x500mm2, XLPE, 6MVA, quadruple circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Required Modifications to SCS of Siemens make supplied by NCC under Phase 11 project to include installation of capacitor banks to the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing.

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope.

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items

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•

REV. 0

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Khalifat 66/11kV S/S Khalifat is existing substation built under phase 9 project by M/s Siemens. Modification of the existing 66/11kV Khalifat substation shall be as follows: •

Install 3x11kV 8MVAr automatic shunt Capacitors;

•

Two (2) Nos. 11kV Bays for capacitor bank to be installed on spare space on 11kV Busbar 1 and Busbar 3;

•

Convert the existing 11kV cable feeder bay in Busbar 2 into Capacitor bank bay, including replacement of CTs;

•

Install one (1) 11kV cable feeder bay on spare space in Busbar 1 or 3;

•

Modification in Schematic Diagrams on 66/11kV Transformer Feeder 11kV Side of A18, A28 and A38 to provide CT inputs for capacitor bank control panel.

•

Modification in Schematic Diagrams on 11kV Bus VT-1, VT-2 and VT-3 to provide VT inputs for capacitor bank control panel.

•

Existing CTs (400/1A) shall be replaced with the new ones, as per the CT sizing calculation.

•

11kV, 1x500mm2, XLPE, 8MVA, triple circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Installation of one (1) 11kV outgoing cable feeder between new cable feeder bay and service corridor outside the Substation boundary wall, included but not limited to cable laying, cable supports, cable cleats, heat shrinkable caps and commissioning tests. Cables and terminations will be supplied by KAHRAMAA. Contractor shall coordinate with concerned KAHRAMAA department.

•

Space for the capacitor banks is available;

•

All required civil works related to new building including building services.

•

Installation of vacuum contactor panels for the capacitor banks;

•

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes on the 11kV switchgear and installation of capacitor banks in the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing;

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope;

•

Required modifications in LVAC/DC system;

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LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Montazah-2 66/11kV S/S Montazah-2 is existing substation built under phase 11 project by M/s NCC. Modification of the existing 66/11kV Montazah-2 substation shall be as follows: •

Install 2x11kV 6MVAr automatic shunt Capacitors utilizing the existing 11kV Capacitor banks bays.

•

Automatic shunt Capacitors shall be installed in the available space in the building.

•

Minor Civil Works shall be done to accommodate the Capacitor Banks in the available space

•

Install vacuum contactor panels for the capacitor banks;

•

Space for the capacitor banks along with space for vacuum contactor panels for the capacitor banks is available inside the building.

•

11kV, 1x500mm2, XLPE, 6MVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Required Modifications to SCS of Siemens make supplied by NCC under Phase 11 project to include installation of capacitor banks to the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing.

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope.

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Naeeja Local 66/11kV S/S Naeeja Local is existing substation built under phase 9 project by M/s Siemens. Modification of the existing 66/11kV Naeeja Local substation shall be as follows: •

Install 2x11kV 6MVAr automatic shunt Capacitors;

•

Two (2) Nos. 11kV Bays for capacitor bank to be installed on spare space on 11kV Busbar 1 and Busbar 2;

•

All required civil works related to new building including building services.

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•

Modification in Schematic Diagrams on 66/11kV Transformer Feeder 11kV Side of A18 and A28 to provide CT inputs for capacitor bank control panel.

•

Modification in Schematic Diagrams on 11kV Bus VT-1 and VT-2 to provide VT inputs for capacitor bank control panel.

•

11kV, 1x500mm2, XLPE, 6MVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Space for the capacitor banks is available;

•

Installation of vacuum contactor panels for the capacitor banks;

•

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes on the 11kV switchgear and installation of capacitor banks in the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing;

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope;

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Old Ghanim 66/11kV S/S Old Ghanim is existing substation built under phase 9 project by M/s Siemens. Modification of the existing 66/11kV Old Ghanim substation shall be as follows: •

Install 2x11kV 6MVAr automatic shunt Capacitors;

•

Two (2) Nos. 11kV Bays for capacitor bank to be installed on spare space on 11kV Busbar 1 and Busbar 2;

•

All required civil works related to new building including building services.

•

Modification in Schematic Diagrams on 66/11kV Transformer Feeder 11kV Side of A18 and A28 to provide CT inputs for capacitor bank control panel.

•

Modification in Schematic Diagrams on 11kV Bus VT-1 and VT-2 to provide VT inputs for capacitor bank control panel.

•

11kV, 1x500mm2, XLPE, 6MVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

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•

Space for the capacitor banks is available;

•

Installation of vacuum contactor panels for the capacitor banks;

•

Required Modifications to SCS supplied by Siemens under Phase 9 project to include changes on the 11kV switchgear and installation of capacitor banks in the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing;

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope;

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;


Alternative Items •

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.


Rawdat Al Khail 66/11kV S/S Rawdat Al Khail is existing substation built under phase 11 project by M/s L&T. Modification of the existing 66/11kV Rawdat Al Khail substation shall be as follows: •

Install 2x11kV 6MVAr automatic shunt Capacitors utilizing the existing 11kV Capacitor banks bays.

•

Install vacuum contactor panels for the capacitor banks;

•

Space for the capacitor banks along with space for vacuum contactor panels for the capacitor banks is available in the substation layout.

•

All required civil works related to new building including building services.

•

11kV, 1x500mm2, XLPE, 6MVA, double circuit, solid bonded (one cable per phase) between 11kV switchgear and Capacitor Banks. Approx. route length: 80m.

•

Required Modifications to SCS of Siemens make supplied by L&T under Phase 11 project to include installation of capacitor banks to the SCS including Gateway Data mapping to DCC/ENCC and S/S works necessary for DCC/ENCC End – to – End testing.

•

Retesting of the Relays/Equipment, all modifications, testing and commissioning and putting into service of these four circuits is included in the Present Scope.

•

Required modifications in LVAC/DC system;

•

LV Power Cables, Control Cables with all accessories;

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Alternative Items •

4.

In case capacitor banks are of the outdoor type, all Civil Works including foundations and substructure to accommodate the same shall be done.

NOTES TO BIDDERS Sequence of documents: In the case of any discrepancy between Tender Documents, namely, Price Schedules and Scope of Works, the Scope of Works will prevail. Equipment/accessories: Not withstanding absence, if any, of specific mention in the Tender, all equipment/accessories with all support structures etc., as required to meet the design requirement of this project are deemed to be part of the scope of works. The end terminations shall be in line with the end equipment and chosen appropriately after verifying the same. Technical Requirement: The design, cable sizing etc., provided in the Tender documents are only guiding principles. These shall be verified and it is the responsibility of the prospective Contractor to ensure that the specified MVA rating for each cable circuit is achieved by adopting appropriate method and/ or adequate cable sizing, considering thermally independent cable circuits. Technical parameters for all the equipment/ accessories required and offered shall be filled in by Bidder even if certain specific formats are not provided in the Tender. The total no of cable spans: The indicated cable spans are for pricing purposes. However, necessary details, schematic drawings etc., with accurate lengths shall be submitted for approval during detailed engineering stage. Good engineering practice in all works shall be adapted to Kahramaa’s satisfaction. Power cables for all voltage levels connecting different equipment within substation shall be supplied and installed by the Substation Contractor which will present nominated subcontractor for the Cable Works. HV cables between the Transformers and switchgears and between cable gantry located within substation boundary to Transformer / switchgear shall be laid in the unfilled concrete cable trough which will be constructed by the substation civil works subcontractor. HV Connections between outdoor sealing end and SF6 wall bushing: The Necessary Jumper for connection between outdoor termination and SF6 wall bushing shall be part of scope of supply of substation Contractor. EHV Connections, disconnecting and dismantling of existing termination and their related accessories, to connect new cable shall be part of scope of work for substation Contractor

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Equipment/accessories: Notwithstanding absence, if any, of specific mention in the tender, all equipment/accessories with all support structures etc., as required to meet the design requirement of this project (to be approved by Kahramaa), are deemed to be part of the scope of works. The end terminations shall be in line with the end equipment and chosen appropriately after verifying the same. Technical parameters for all the equipment/ accessories required and offered shall be filled in by tenderers even if certain specific formats are not provided in the tender. Good engineering practice in all works shall be adapted to Kahramaa's satisfaction. Civil works: In addition to all related civil works along the cable route, construction of all cable troughs/ concrete trenches, steel support, foundations, structures etc., for cable sealing ends/ connections inside the substations for the cable feeder lines (except foundations/ structures for equipments inside cable compound and OHL gantry and cable ducts to buildings, Road Crossing ducts etc., inside substations) as well as necessary coordination with the respective cable/ OHL Contractor(s) to ensure technical and programme compatibility and compliance, shall be part of the substation Contractor’s scope and responsibility. Architectural view/design of all substations to be built under this contract shall match with the surrounding structures / buildings etc., as applicable. The same shall be investigated by the Contractor and a report shall be presented on the proposed options of architectural views to Kahramaa for review and approval. All design approvals in this regard shall be obtained from Kahramaa and concerned authorities by the contractor prior to submission of DC1 and structural design works. It shall then be the EPC contractor’s responsibility to design and implement approved design/ final architectural view that is selected by Kahramaa. Kahramaa has introduced three types of Architectural design which will be applicable for all Facility D Substations: Residential, Prestigious and Industrial. This architectural design shall be done as per Appendix F – Drawings and table below. Substation classification regarding type of architectural design is given in the following table:

No.

Name of S/S

Type of Design

Package S-1

1.

220/132/11kV Al Shahhaniyah Super

Prestigious

2.

132/11kV Al Shahhaniyah South

Residential

3.

132/11kV Lebsayyer

Prestigious

Package S-2

4.

132/66/11kV Umm Ebairiya

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No.

Name of S/S

Type of Design

5.

66/11kV Umm Al Amad - 1

Residential

6.

132/11kV Umm Garn

Prestigious

Package S-3

7.

132/11kV Al Jahhaniya 2

Residential

8.

132/11kV Izghawa North

Residential

9.

132/11kV Mesaieed Industrial-A

Industrial

10.

132/11kV Wakrah 3

Residential

Package S-4

11.

66/11kV New Assiri

Prestigious

12.

66/11kV Salwa Road

Prestigious

13.

66/11kV Bin Mahmoud North

Residential

14.

66/11kV Musherib

Residential

Package S-5

15.

66/11kV Murrah South

Prestigious

16.

66/11kV Umm Al Seneem 2

Residential

Package S-6

17.

132/11kV Ain Sinan

Residential

18.

132/11kV Jeryan Jenaihat

Residential

Package S-7

19.

66/11kV Doha E New

Residential

20.

66/11kV Salata New

Prestigious

Package S-8

21.

132/11kV Mashaf 1

Residential

22.

132/11kV Mashaf 2

Residential

23.

132/11kV Mashaf 3

Residential

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No.

Name of S/S

Type of Design

24.

132/11kV Al Wukair 10

Residential

Package S-9

25.

132/11kV Al Wukair 9

Residential

26.

132/11kV Al Wukair 8

Residential

27.

132/11kV Al Wukair 7

Residential

28.

132/11kV Al Wukair 6

Residential

Package S-10

29.

132/11kV Al Wukair 5

Residential

30.

132/11kV Al Wukair 4

Residential

31.

132/11kV Al Wukair 3

Residential

32.

132/11kV Al Wukair 2

Residential

Package S-11

33.

66/11kV Abu Hamour West

Residential

34.

66/11kV Rawdat al Khail 2

Residential

35.

66/11kV Luaib

Prestigious

Package S-12

36.

220/132/11kV Framework S/S – 1

Prestigious

37.

220/66/11kV Framework S/S – 2

Residential

Package S-13

38.

132/11kV Framework S/S Type A-1

Prestigious

39.

132/11kV Framework S/S Type A-2

Residential

40.

132/11kV Framework S/S Type B-1

Prestigious

41.

132/11kV Framework S/S Type B-2

Residential

42.

132/11kV Framework S/S Type C

Residential

Package S-14

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No.

Name of S/S

Type of Design

43.

132/11kV Framework S/S Type A-1

Prestigious

44.

132/11kV Framework S/S Type A-2

Residential

45.

132/11kV Framework S/S Type B-1

Prestigious

46.

132/11kV Framework S/S Type B-2

Residential

47.

132/11kV Framework S/S Type C

Residential

Package S-15

48.

66/11kV Framework S/S Type A-1

Prestigious

49.

66/11kV Framework S/S Type A-2

Residential

50.

66/11kV Framework S/S Type B-1

Prestigious

51.

66/11kV Framework S/S Type B-2

Residential

52.

66/11kV Framework S/S Type C

Residential

Package S-16

53.

66/11kV Framework S/S Type A-1

Prestigious

54.

66/11kV Framework S/S Type A-2

Residential

55.

66/11kV Framework S/S Type B-1

Prestigious

56.

66/11kV Framework S/S Type B-2

Residential

57.

66/11kV Framework S/S Type C

Residential

Outdoor Cable Sealing End: Substation Contractor responsible for cable line connection with outdoor type termination shall include following in their bid price for outdoor sealing end connection at cable compound/gantry: respective foundation, steel structure and all necessary material and accessories, surge arresters including their foundation and steel structure, all material required for earthing of equipment and structure – connection to the earth grid, terminals for connection to OHL down leads, removing of existing cables and sealing end, if any, and all related civil works. In case that existing foundation is suitable to be used, Contractor may propose such solution and appropriate structural calculation shall be provided for Kahramaa approval. Kahramaa decision will be followed in this regard. Substation Contractor shall supply, install, erect and commission cable links within substation as per execution plan of substation without any delay; all required interface arrangement shall be cable Contractor responsibility. GTC-735 SCOPE OF WORKS R0

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Cable Compounds: Where a Cable Compound is required, a Terminal Tower & Gantries with their foundations and earthing system to provide no more than 5Ω resistance to earth for each structure, Cable Compound Palisade Fence complete with gate, foundations, earthing, kerb stone etc. shall be provided in order to lead the line in. Earthing System of mesh type according to IEEE 80 shall be also provided for the whole cable compound area. The earth conductor shall be of lead sheathed copper as elsewhere specified. The earthing systems of all structures (tower, gantries, fence etc.) shall be connected to the earthing mesh. All connections, including mesh earthing conductor intersections shall be made by thermo weld process. Testing Equipment: In addition to all related equipment required for cable installation and commissioning test for cable feeders connected to GIS switchgear and cable feeders to Transformers as well as necessary coordination with substation manufacturer/Contractor, the test bushing and degassing, gassing and oil filling/derange shall be part of the substation Contractor’s scope and responsibility. Specifications, Technical schedules and Drawings: New route and relevant new drawings are provided where necessary. For referring to the main contract information, please note that Single line diagrams are in Appendix – F – Drawings, Technical Specifications are in Sections 3.2 & 3.3 and Technical Schedules in Section 3.4 of this Appendix. Route Length: The quantities given for cable length in TED are approximated for Tendering purposes and shall be adjusted according to actual results of survey. Shutdown: The shutdown for diversion of cable circuits or connection of cable circuits to existing substation shall be arranged by Kahramaa, circuit by circuit only, according to requirement of Kahramaa network (operation & maintenance). Earthing Continuity Conductor: Cross-section of earthing continuity conductor should be provided in order to carry the full value of short circuit current, as specified. Pilot Fiber optic cable and Pilot Copper cable: A budget calculation note and cut over plan for diversion of the Pilot FO cables and Pilot Copper cables shall be provided for Kahramaa approval. For any of Power outages due to conversion/connection of OHL and/or cable line to cable and/or OHL line, as specified under GTC 735/2015 and GTC 736/2015 Contracts, the following shall be provided: The Substation Contractor shall maintain/restore all protection services running on fibers of OPGW and Pilot Fiber Optic cables and on copper wires of pilot copper cables associated with above Power lines.

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The Telecom Contractor shall maintain/restore all telecom and/or IT services running on fibers of OPGW and Pilot Fiber Optic cables and on copper wires of pilot copper cables associated with above Power lines. Coordination between Substation Contractor and Telecom Contractor during above maintain/restore of services is required. The required Fibre Patch cords for above maintain/restore of services shall be provided by Substation Contractor and/or Telecom Contractor and shall be installed in flexible metallic pipes with one patch cord in single pipe, alternatively flexible sheath patch cables can also be used, subject of Kahramaa approval in both cases. Old OTBs and Pilot Wire termination equipment not in service, shall be dismantled (subject of Kahramaa approval) and handed over to Kahramaa stores packed and labeled as per Kahramaa regulations. Pilot cable: Installation of gland for termination of pilot cable at relay panel of 11kV SWG is included in the Scope of substation Contractor. Cable diversion: Substation Contractor will be responsible to check the existing teleprotection cable to match with new diversion. Dismantling of Oil Filled Cable to install new XLPE cable: the following shall be under scope of work for substation Contractor: Excavation and related civil work Removing oil tank Disconnect Gauge/manometer panels and control/alarm cables Cut and cap existing oil filled cables Remove the existing termination Delivery of dismantled material to Kahramaa store Work inside Generation/industrial plant (Messaied, Dukhan and Ras Laffan): All activities/works inside Messaied, Dukhan and Ras Laffan subject require permission from Messaied, Dukhan and Ras Laffan authority. Work shall be according to safety rules and regulations of Messaied, Dukhan and Ras Laffan. Authorised persons for holding required permit shall be interviewed at Messaied, Dukhan and Ras Laffan. Alternative Offer (for HV Cable works): Optionally the Bidder is encouraged to submit an alternative cost effective offer, if he wishes to do so, with complete design justifications, calculations, parameters, drawings etc., as necessary. However, this optional offer, if submitted shall be in addition to the main offer and not in lieu of it. Bidders must use the same price schedule template with only change in the cable conductor for this alternative offer. This shall be submitted in addition to the main offer. GTC-735 SCOPE OF WORKS R0

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Warranty: In the event that a new cable requiring connection to an existing cable which is under warranty by the original contractor, the new cable Contractor will make arrangements with the original contractor of the existing cable to carry out the connection and to follow prudent procedures in order to avoid the cancellation of the remaining warranty period on the existing cable. The original contractor of the existing cable is expected to be cooperative and Kahramaa will view any reluctance from the original contractor as unacceptable behavior which will have impact on future approval of bids by such contractor. The new cable Contractor shall guarantee that their work will be conducted as per normal procedures and will be responsible for the repair of any damage they may cause to the existing circuit. Third Party Damage During Warranty Period: No reduction to the Warranty Period "as specified in Article 9.51 of the GCC" for the Works or any part of the Works, shall take place for whatsoever reason during the Warranty Period. The Contractor is responsible to make good all defects that may arise, in accordance with Article 9.53 of the GCC. If third party damage to the Works or any part of the Works occurs; Kahramaa and the third party shall be responsible for the repair of the damaged works in accordance with Kahramaa standard regulations and the specification of the Contract. Kahramaa may instruct the original Contractor to perform the repair of any third party damage to the Works or any part of the Works, if the Contractor accepts Kahramaa instruction to perform the repair or remedy of any third party damage. The cost of such repair shall be paid by Kahramaa to the Contractor and shall be calculated based on the unit rates of the Contract or within a reasonable range of. If Kahramaa performs the repair works through any of its reputable Contractors, the repair work shall be performed under the supervision of the original Contractor if available at seven (7) days notice. Costs of supervisor shall be based on unit rates of the original Contract or reasonable range of. If the original Contractor does not make available to Kahramaa the required resources for the repair work or the supervisor within above notice period, Kahramaa may conduct the repairs without further notice to the original Contractor or the presence of their supervisor or representative but always in accordance with procedures agreed by Kahramaa and the original Contractor and clearly specified in the original contract document, in absence of which Kahramaa will operate within its standard practices. The above repair works shall in no way be used by the Contractor as an excuse to limit or terminate the Warranty of the Works or the repaired parts. For outage required on Power cable and/or OH line in order to establish: 1) 2)

Energisation of: new SS or new Power cable/OH line, or Power/OH line diversion.

the obligation of the Contractor is to provide programme for outage, all necessary material and works for shifting of existing communication traffic (protection, telecom, Kahramaa IT traffic) running over FO cable, OPGW, and/or pilot copper cable associated to Power feeder coming under the subject outage. Prior the restoration i.e. energisation of feeder being under outage the GTC-735 SCOPE OF WORKS R0

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Contractor is obliged to restore/establish communication traffic as per his final design. The Contractor is obliged to coordinate closely with Kahramaa System Control on the above communication traffic shifting” The shutdown for diversion of OHL circuits or connection of OHL circuits to existing substation shall be arranged by Kahramaa, circuit by circuit only, according to requirement of Kahramaa network (operation & maintenance). Foundation Classes (OHL): Foundation classes for OHL specified in the Schedule of Prices are according to Foundation Design Particulars of Section 3.3.1, Volume 3.

5.

NOTES APPLICABLE FOR FRAMEWORK PACKAGES Due to the very rapid economic developments in the country, Kahramaa has been frequently requested by the Developers/Government Authorities to implement the new substations in a very short period of time. Considering the standard tendering or variation procedure such urgent request could not be always properly replied within the expected period. In order to facilitate such urgent requests, which are also expected to arise during the execution of GTC/735/2015 (Phase 13) Contract, it has been decided to establish Framework Packages within this Tender with the main purpose to enable: • •

fast award of the new works, faster implementation due to the availability of the approved equipment, documentation and subcontractors.

GTC 735/2015 Tender consists of: Main Packages (Packages S-1 to S-11) Framework Packages S-12 to S-17), and Telecom as Package S-18 Each Main Package can be awarded to the separate Bidder, however, more than one Main Package can be also awarded to the same Bidder, similarly to the practice already applied in previous Kahramaa Tenders. In particular, the Framework Packages shall cover the installation of the following typical (most frequently) used types of the substations: Package S-12 Containing of 220/132/11kV substation and 220/66/11kV substation with the specification and description as provided in the clause no. 3.12 of this SOW. Also, it should be noted that types of remote ends are included (one for SS built after Phase 8, one for those built under Phase 7, one for those built under Phase 5/6 and GTC 53 projects and one for very old substations with 220kV indoor/ outdoor switchgear supplied under Phase 3 / 4, RAF A/ B projects built in early 1980s). GTC-735 SCOPE OF WORKS R0

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Depending on the connection scheme of the new substation the suitable type of remote end works shall be applied. Package S-13 and S-14 Containing of five nos. of 132/11kV substation with the specification and description as provided in the clauses no. 3.13 and 3.14 of this SOW. Also, it should be noted that types of remote ends are included (one for SS built after Phase 8, one for those built under Phase 7, one for those built under Phase 5/6 and GTC 53 projects and one for very old substations with 132kV indoor/ outdoor switchgear supplied under Phase 3 / 4, RAF A/ B projects built in early 1980s). Depending on the connection scheme of the new substation the suitable type of remote end works shall be applied. Package S-15 and S-16 Containing of five nos. 66/11kV substations with the specification and description as provided in the clause no. 3.15 and 3.16 of this SOW. Also, it should be noted that types of remote ends are included (one for SS built after Phase 8, one for those built under Phase 7, one for those built under Phase 5/6 and GTC 53 projects and one for very old substations with 66kV indoor/ outdoor switchgear supplied under Phase 3 / 4, RAF A/ B projects built in early 1980s). Package S-17 Containing of four nos. 66/11kV substations, including underground with the specification and description as provided in the clause no. 3.17 of this SOW. Also, it should be noted that types of remote ends are included (one for SS built after Phase 8, one for those built under Phase 7, one for those built under Phase 5/6 and GTC 53 projects and one for very old substations with 66kV indoor/ outdoor switchgear supplied under Phase 3 / 4, RAF A/ B projects built in early 1980s). The Bidders shall quote for the above typical substations as specified in the Scope of Works and Price Schedules. It should be understood by the Bidders that these substations could be or not implemented within the Contract Period of the Main Package. Also, the number of various equipment like switchgear bays, Shunt Reactors, Transformers for various voltage levels and similar could be modified at the time of implementation, depending on the actual requirements of the Developer and network configuration where new substation is to be connected. The following rules shall be applicable for award of the Framework Packages: •

Price Schedules for Framework Packages shall be part of the Contract between Kahramaa and successful Bidder(s) for Main Package(s), and shall be valid for period of 1 (one) year from the Contract Effective Date.

•

At any time within the first year from the Contract Effective Date (CED), Kahramaa shall have the option to award part (but minimum one complete substation) or the complete scope of the Framework Package based on the prices stated in the Framework Package Price Schedules.

•

There shall be no liabilities on Kahramaa if the option is not utilized.

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•

The Contract Period for additional works from the Framework Package shall be calculated from the date of the Instruction to Proceed. Duration shall be agreed between Kahramaa and Contractor within the range given in Appendix H – Contract Execution Plan for the particular type of substation. Final Contract Period shall be based on the actual status of the equipment and design approval, availability of the site plot, and other elements that can influence the completion time.

•

Framework Package works award shall be covered by the Instruction to Proceed (similar to Letter of Award), issued by Kahramaa in the form of letter to the Contractor. The Contractor should confirm the acceptance of the Instruction to Proceed (including specified Price and Completion Period, and any other conditions stated therein) by issuance of the letter of Confirmation.

•

The awarded works shall be considered as separate Milestone within the existing Contract or shall be covered by the separate Contract under the same conditions and specifications as Main Packages Contract.

•

Any award from the Framework Package shall not affect the 20% limit for Variations as specified in article 14.2 of General Conditions of Contract.

•

The criteria for the award to the Framework Packages shall be in the following order: the Price, Performance of the Contractor on the Main Packages, However, the final decision shall be on Kahramaa.

•

The substation specification and quantities given in the Price Schedules are indicative. The Kahramaa might decide the change some of the quantities based on the actual requirement, i.e. alteration in number of xxkV switchgear bays, Shunt Reactors, Power Transformers, etc. Final Price Schedule shall be established based on the rates derived from the Framework Package Price Schedules.

•

Available rates for Remote End works shall be used as applicable to the actual substation connection point.

•

LME and Currency adjustment shall be applied based on the date of Final Instruction to Proceed issued by Kahramaa.

•

In case of the Framework Package award, the Contractor shall provide Performance Bond with the value and duration corresponding to the agreed Final Price and Contract Duration according to the General Conditions of the Contract.

•

After final price adjustment and approval of Final Price Schedules, Contract shall be amended by signing and issuing Contract Amendment Agreement.

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•

6.

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Advance Payment, if agreed for the Main Packages, shall be also applicable for Framework Package. IMPORTANT NOTES APPLICABLE FOR ALL PACKAGES

Following documents are included in Volume 2 (along with this document, section 3.1 Scope of Works) of Tender which may be referred to understand Kahramaa requirements regarding equipment numbering, interlock scheme, Protection energy meter & system control requirements for Bulk customer: Annexure I Interlocking Scheme Rev 3 Annexure II Equipment numbering scheme Rev 2 Annexure IV ET-P26-G1 Guidelines for Protection Energy Meter Requirements for Power Supply to Bulk Consumers Annexure V - ES-EST-P1-G1 Guideline for System Control Requirements for Power Supply to Bulk Consumers.pdf For applicable CT ratio for all voltage levels and bays refer to the document ‘Annexure III - CT ratios REV 2.xls’ in Section 3.3.8 of Vol. 3 All modification works at Kahramaa control centers NCC/ENCC/DCC to include new and modified / upgraded / refurbished existing substations will be covered under a separate contract. The scope of substation Contractors under this project includes all necessary works inside the substations to complete the work successfully. This includes co-ordination works with the above Contractor and Telecommunication Contractor during all stages until commissioning and end to end test. If future Transformers / Reactors are envisaged elsewhere in the scope, space reserved for these equipment and trenches of approach cables to these equipment shall be prepared in such a way to avoid drilling, cutting etc. in future using heavy equipment so as to avoid damages to the existing installations. To eliminate these difficulties in future, necessary excavations shall be done for Transformer / Reactor foundations and trenches of approach cables. Finally, these cavities shall be filled with loose sands making it convenient to construct the foundations and trenches in future. Note for refurbishment/ modification/ replacement of substation works: It is planned to modify / replace / upgrade some of the Kahramaa substations in this project. In case of some of the substations UPDA has allocated new sites adjacent to the existing substations. Other substations are to be built within the boundary of existing live substations. The Contractor shall adopt safety procedures related to work in live environ. Wherever and whenever it is required to obtain outage of any circuit or part of the substation the Contractor shall co-ordinate with transmission network department to obtain necessary outage and safety documents. In this respect please note that during the summer time, between months of April to month of October none of the circuits on load can be released due to heavy load.

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The Contractor shall plan his works to minimize Power supply interruption. The dismantling and reconstruction shall be done in phased manner which has been described in detail elsewhere. Where the shifting of respective 400kV, 220kV, 132kV and 66kV OHL / Oil filled and /or XLPE cables work is allocated to another Contractor under separate contract(s), all required coordination for work schedule, material management etc. shall be done with the other Contractor to complete the works in full respect. The Contractor shall consider all such requirements and shall take all necessary measures required for these works. It may be noted that the diversion/ shifting of 11kV OHL / cable circuits, wherever applicable, to the new substation is not within the scope of this contract unless specified otherwise in detailed scope of works. Wherever specified the Contractor shall supply set(s) of main protection relay e.g. cable differential protection relay for each of the feeder for remote end stations. If specified elsewhere some of the primary equipment (such as Reactor) may be reused as per main scope of works. However completely new functional protection system for ALL equipment is to be provided as per the specifications, standard drawings and technical schedules. All 400kV, 220kV, 132kV, 66kV, and 11kV Cable / OHL feeders are to be shifted from existing substation to new switchgear. Hence all protections at remote end substations must be changed to be compatible with new protections as described under protection scope of works. An extensive site survey may be carried out by substation Contractor to study detailed scope of work to be undertaken at remote substations presently connected to the substation. In case of underground cable feeders care shall be taken to choose proper protection(s) to connect with existing oil filled cable / XLPE Power cable and pilot cable /fiber optic cable. Remote end substation(s) where panels are equipped with protections, the required modification to make it functional and compatible with the new substation is under the Contractor’s scope as described under protection scope of works. Note for Remote End Modification works: If the case that substation and its remote end works are not awarded to the same Contractor, all necessary coordination works are deemed to have been included in the offered price of the both awarded Contractors.

7.

EXTENT OF SUBSTATION CONTRACT The project shall be executed as substation Contract. The works and services to be performed by the Contractor shall comprise the design, manufacture, shop tests, packing, transport, insurance, and charges incurred up to delivery to the port of entry in Qatar, landing charges, customs, transport to Site, insurance, site clearing and leveling, excavation, building road crossing ducts as required after detailed route survey, cable laying and jointing, terminating, etc., in-fill, boundary wall, access roads, drainage, sewage, construction works, erection of equipment, site testing, submission of documentation, commissioning, training of Kahramaa ’s staff, delivery of spare parts and tools, temporary site buildings and accommodation, warranty and everything necessary to

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leave the plant complete and in full working order at the expiration of the warranty period in accordance with the provisions of the substation Contract. The establishment of new Overhead lines and LILO of the existing Overhead lines shall be executed as a part of this substation EPC Contract. The substation Contractor is bound to provide for all parts of the work to be completed in every respect for commercial operation and to Kahramaa’s requirements notwithstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the plant are not specifically mentioned in the Specification. These are to be considered as included in the Scope of Works and Contract Price. 5.1

7.1

SCOPE OF SUPPLY The Scope of Supply is as specified in Technical Specifications, Technical Schedules, and Appendix – B: Price Schedules and Appendix – F: Drawings. The quantities indicated in the Schedule of Prices (Appendix B refers) and Drawings (Appendix F refers) both attached to the Specification are provided for information only. The substation Contractor is responsible to establish the exact details, quantities of the equipment and accessories required to complete the whole of the works as described throughout the Tender Documents, after the necessary approvals. General Technical Requirements are given in Section 3.2 of Appendix A, while the specific requirements for the various equipment and works are set forth in Section 3.3 – Technical Specification and Section 3.4 – Technical Schedules of Appendix ‘A’.

5.2

7.2

SCOPE OF SERVICES The Scope of Services shall include but be not limited to the following: Preparation of the detailed specification for each piece of the equipment up to the satisfaction of Kahramaa before commencement of manufacturing; Establishment of the project administration and all site and installation procedures as detailed in the Specification; Project site organization, at Doha and site offices, stores, local transport etc.; Detailed soil investigation report and excavation of trial pits and testing of the original soil properties, including thermal properties; Detailed site survey at the approved locations, detailed route survey (for underground cables), preparation of appropriate topographical drawings and establishment of the project set-up;

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Circulate the location map and civil/architectural design drawing and approval requests to all concerned government authorities. Follow up and obtain such approvals. Regular renewal of the approvals and work permits as necessary; Establish the subcontract agreement with the approved local civil Contractor. Follow up and supervise the civil works and ensure timely and quality execution of the works; Procurement of mutually compatible elements / accessories for all equipment and installation of the same by competent personnel through active direct supervision to ensure highest levels of quality and good engineering practice. Local transport storage and delivery to the site / storage yard of the equipment; Manufacturing, factory acceptance tests, packing and transport to site; Interfaces with other Contractors of Phase 11 (GTC/488 and GTC/450), Phase 12 (GTC/643, GTC642 and GTC641) and NCC control and equipment manufacturers at the existing substations and make all necessary arrangement to facilitate the termination of cables/OHL to the switchgear. Civil Works including Site survey, soil investigation work and testing of soils, water and materials used; Collection of information required for detailed design and construction, including coordination with the various government ministries and departments, obtaining of building permits, etc.; Design, preparation of detailed construction drawings and bending schedules, completion and maintenance of works; Earthworks, grading and landscaping; Site surfacing; Switchgear, control / relay buildings including all building services, compound wall, gates, structure and plant foundations, cable ways, toughing and ducts; Temporary and permanent access roads to substation from public road and road works within substation; Site lighting system, including security lighting, small Power and lighting installations. Fire detection & alarm system, FM200 system, passive fire protection (fire sealant works & cable coating (for HV/ML/LV cables) inside the buildings and fire protection system & Transformer explosion prevention system, wherever specified for the Transformers & reactors shall be in accordance with Kahramaa HSE requirements All cables in basement shall be coated with fire resistance material

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Personal access steps or similar where required above HV / EHV cable in basement. To avoid damage of the Power cable terminations in substation basement before plugging in all male part termination sealing ends shall be covered with permanent protective cap till plugging. In order to properly supervise the installation works permanent presence of your Power cables and accessories manufacturer is required. Checking of Power cable system prior to conducting LV and HV tests shall be performed by both main contractor and the manufacturer. Air-conditioning and ventilation and smoke extract systems; Transformer compounds; construction of foundations for all Transformers. Excavation and backfilling for future Transformers and Reactors. 'E' type fire wall for Transformers, Reactors etc.; Construction of common / combined oil containment tank other than Transformer oil dyke. All necessary associated works; Guard Rooms. Installation of the equipment under the supervision of equipment manufacturers’ specialist technicians; Clearance of site (Removal of site offices, stores, disused materials, grading and landscaping on completion, and necessary clearances from govt. / concerned authorities); Testing & Commissioning; Training of Kahramaa’s staff. Defects Clearance; Submission of final As-Built drawing Provision of completion reports with the relevant documents; Documentation in accordance with the requirements; Warranty Period Services. The period of Warranty for all the works executed under this shall be 2 years from the date of Taking Over. The Warranty obligation and the warranty period shall NOT be changed or reduced by any third party damages to the Works or any part of the Works, in case the Contractor perform the repair of that damage or the damage has been repaired under the supervision of the Contractor. GTC-735 SCOPE OF WORKS R0

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The Warranty obligation and the warranty period shall NOT be changed or reduced by any third party damages to the Works or any part of the Works, in case the Contractor perform the repair of that damage or the damage has been repaired under the supervision of the Contractor. 5.3

7.3

REQUIRED DISTANCES IN GIS / CONTROL ROOMS It should be noted that clearances in the GIS room and its final dimensions have to be specified and confirmed by GIS manufacturer, considering GIS arrangement, type, required space for testing, replacement of main components (such as circuit breakers) if necessary, dimensions of specific GIS bays / components, arrangement of pressure relief openings, etc. Drawings which clearly represent access to the inspection points, testing arrangements, maintenance and replacement of main components will be provided by Contractor as the base for building architectural design. Minimum clearance in the GIS / Control room as specified herein below are based mainly on the regular maintenance and inspection requirements, conformity of working space and safety requirement for minimum gangway distances. Equipment arrangement shall be such to provide: min. personnel working area of 1m and minimum widths of passageway 0.8m. All round clearance around the GIS: This space should ensure sufficient space for the free moving of gas cart and mobile platforms. It should be min. 1.5m. At the entrance to GIS room, on the side of offloading area of equipment, additional space has to be provided to enable transport of equipment inside the GIS and handling by the crane. It should be min. 2.5m after the space for the last future bay. Space around LCC: LCCs without requirement for the rear access are preferable, since they require less space. In this case they can be aligned to the wall with minimum clearance for the easier cooling (i.e. 5cm). Minimum distance between GIS and LCC should be 2m. Depth of working space in the front of panels (control, protection, etc.): Min. 1.2m. If the panels are accessible from the rear side, minimum clearance to the wall shall be 1m. In this case it is required that rear doors (if any) are all closing on the same side and in direction of emergency exit which will enable fast evacuation of persons from this area. If panels are arranged in two or more lines, with doors opening to the same aisle, minimum distance between panels is 2m. Minimum free height of working space is 2m. In addition to above, working space around GIS shall ensure the following for repair / replacement: Sufficient horizontal free space shall be provided to facilitate removal of components that are deemed to be withdrawn horizontally

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Similarly, sufficient vertical free space shall be provided to facilitate removal of components deemed to be withdrawn vertically. For 33kV and 11kV metal enclosed SWG with withdrawable components: From the component in draw-out position minimum clear space shall be 1.5m.

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5.4

7.4

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INTERFACES BETWEEN CONTRACTORS

TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

A.1

GENERAL AND CABLES - DESIGN

1

Substation plot layout x drawing with coordinates

2

Cable Line Route drawing in SS vicinity with coordinates

x

3

Matching of cable line route x with plot layout

x

4

Substation plot drawing showing routing inside SS

5

Substation basement layout drawing showing cable x routing

x For existing SS

6

Provide road drawing and arrangement at required)

crossing duct s/s (if

x

7

Provide drawing

crossing

8

Provide size / arrangement requirements for the cable basement sleeves

9

Provide duct size and arrangement at s/s basement x and telecom room

10

Specify the cable bending radius

GTC-735 SCOPE OF WORKS R0

fence

CABLE CONTRACTOR

TELECOM CONTRACTOR

HV

layout cable x

x

x

x

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

11

Earthing grid layout drawing including details about x material and size of used conductors

12

Specify link box / link box support steelwork requirements (include drawings and fixing details) and location.

x

13

Provide details of the cable support steelwork

x

14

Provide GIS / Switchgear Bay details (including section x drawings)

15

Provide details of GIS / Switchgear Bay cable x termination kit compatibility

16

Cable Type (Three Core / Single core) and Cable Construction - including cross section drawings, details about material, crosssections, diameters, tolerances.

x

17

Specify no. of cables per phase and cable formation details (Trefoil / Flat spacing)

x

18

Provide details of 66 & 132kV GIS male size and type for cable feeder and s/s cable links

x

19

Provide details of 66 & 132kV x GIS female size and type for

GTC-735 SCOPE OF WORKS R0

CABLE CONTRACTOR

TELECOM CONTRACTOR

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

CABLE CONTRACTOR

TELECOM CONTRACTOR

cable feeder and s/s cable links

20

Matching of male - female cable termination connector x parts

21

Provide Transformer box details

22

Provide details of the GA of the cable termination and its fixing details (drawing to be supplied).

23

Switchgear Bay Allocation

x and Kahramaa

24

Phase Identification

x

25

Matching of phases on line terminal ends

26

Identification of bays / x (circuits and Power and Kahramaa Transformer) numbers

27

Matching of circuit numbers

28

Specify GIS requirements.

29

30

test

Specify cable requirements

cable

bushing

HV

x

x

x

x

x x

test

Specify safety clearance required during the HV test as x per Kahramaa Specifications.

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

31

Specify milestones for cable installation/testing/commissio ning required for x commissioning of substation (on individual circuit basis).

32

Access for cable installation, preparation of cable x terminations, cable electrical and HVAC testing.

33

Questionnaire for data required for protection x settings and milestone to provide required data

34

Reply to questionnaire for protection setting

A.2

GENERAL AND HV CABLES - EQUIPMENT / MATERIALS

1

Cable termination - female x part

2

Cable termination - male part

x

3

Cable supports and cable cleats with fixing material

x

4

Cable sleeves for basement

5

Sealant sleeves

6

Ducts for road crossing inside x SS

7

Ducts for crossing under SS x perimeter fence

for

GTC-735 SCOPE OF WORKS R0

utilized

CABLE CONTRACTOR

TELECOM CONTRACTOR

x

x

x

cable

x

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

8

HV Test bushing

9

Testing leads

x

10

All installation material up to and including OTB / OTP

x

A.3

GENERAL AND HV CABLES WORKS (Including all tools and materials required for completion)

1

Construction of cable trenches / ducts inside SS from the perimeter fence to the GIS basement / Transformer for incomer feeders.

2

Construction of cable ducts x for roads and fence crossing

3

Provision of free access for cable installation and related civil works, preparation of x cable terminations, electrical and HV AC testing

4

Installation and fixing of cable steel supports

x

5

Cables installation

x

6

Sealing sleeves

7

Gassing / de-gassing of GIS x cable compartment and For new SS removing / establishing of

of

GTC-735 SCOPE OF WORKS R0

utilized

x For new SS

cable

CABLE CONTRACTOR

TELECOM CONTRACTOR

x For existing SS

x

x x For existing SS

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

CABLE CONTRACTOR

TELECOM CONTRACTOR

GIS testing link 8

Installation of Cable sealing ends

x

9

Cable termination to GIS / Supervise Transformer For new SS

x

10

Link Installation

x

11

Cable connection enclosure

x

12

Enclosure flange intermediate plate

13

Seal

14

Insulator collar or adaptor

x

15

Intermediate gasket

x (if needed)

16

Flange

x (if needed)

17

Electrical stress component

18

Cable gland

x

19

Non linear resistors

x (if needed)

20

Insulating fluid

x

21

Seal

x

22

Installation and connections Supervise of Testing equipment For new SS

x

23

Earthing bonds required for all GTC736/2015 equipment (steel support, link boxes,

x

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or

x x

control

x

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

CABLE CONTRACTOR

TELECOM CONTRACTOR

etc.) x

24

HV Test performance

B

FO CABLES

1

GTC736/2015 FO cable design and all technical details

2

GTC735/2015 S/S FO cable design and all technical x details (in case of cable diversion)

3

GTC735/2015 - Telecom FO cable design and all technical details (in case of new and old buildings telecom connections)

x

4

Provision drawing

x

5

Provision of telecom room equipment layout

6

Specify OTB/OTP details (drawings and fixing details) and location

7

Specify OTB color to match with telecom equipment

8

Specify FO cable routing inside S/S plot from fence up to and including telecom room (to OTP/OTB)

x

9

Installation of OTBs included in the Scope of GTC736/2015

x

GTC-735 SCOPE OF WORKS R0

of

S/S

layout

x

x

x

x

x

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

10

FO Patch cords from x protection relays to OTP/OTB

11

Splicing of all GTC735/2015 S/S FO cables at OTP / OTB x including E-E test

12

Final E-E test of FO cable line in case splicing of FO cables x with OPGW.

13

Splicing of all GTC736/2015 FO cables at OTP / OTB including E-E test

14

Splicing of all GTC736/2015 Telecom FO cables at OTP / OTB including E-E test

15

Milestones for FO laying, termination & end-to-end x testing

C

DTS SYSTEM – Not Applicable for New Lines

1

DTS FO cable design and all technical details

2

Provision drawing

3

Provision of control equipment layout

4

Specify DTS FO cable routing inside S/S plot from fence up to and including control room (to DTS panel)

x

5

Specify DTS Unit details (drawings, fixing details,

x

GTC-735 SCOPE OF WORKS R0

of

S/S

layout

room

CABLE CONTRACTOR

TELECOM CONTRACTOR

x

x

x

x

x

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

CABLE CONTRACTOR

TELECOM CONTRACTOR

Power supplies) and location x

6

DTS unit connection to SCS

7

DTS unit connection TCP/IP Router

8

Provision of Power cables for DTS Equipment supply

x

9

Milestones for FO termination & testing

x

10

Integration of DTS into integrated W/S for CMS access (Provision of DTS remote access software)

11

Integration of DTS into integrated W/S for CMS access (Implementation of x DTS remote access software in W/S)

D

TELECOM EQUIPMENT

1

Provision drawing

2

Provision of Telecom room equipment layout

3

Provision of Telecom room for installation of Telecom x equipment

4

Provision of cables between protection relays and x teleprotection equipment

5

Provision of data cables x between gateways of SCS to

GTC-735 SCOPE OF WORKS R0

of

S/S

to x For new SS

laying,

layout

x For existing SS

x

x

x

TECHNICAL AFFAIRS Electricity Projects Dept.

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CABLE CONTRACTOR

TELECOM CONTRACTOR

connectors at interface cards on telecom equipment

6

Provision of TCP/IP connections for OMS remote x access and non-SCADA applications

7

Provision of telecom alarm connection cables between SCS common bay controller x and terminals block at telecom cabinet.

8

Provision of earthing system inside telecom room as part x of common earthing system

9

Provision of 240V, AC Power supply cables from station x services supply up to telecom cabinets for aux. services

10

Provision of cable installation for non-critical services such as PMR, CCTV, etc. for future x connection to telecom equipment

11

Provision of 240V, AC UPS and MCB for Telecom x equipment supply

12

Provision of Power cables from MCBs to Telecom equipment

x

13

Provision of data cables between alarm terminal blocks at UPS and alarm terminals blocks at Telecom

x

GTC-735 SCOPE OF WORKS R0

TECHNICAL AFFAIRS Electricity Projects Dept.

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INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

CABLE CONTRACTOR

TELECOM CONTRACTOR

equipment

14

Modification in 48V DC Power supply for telecom equipment in existing SS

E

PILOT COPPER CABLES

1

GTC736/2015 pilot copper cable design and all technical details

2

GTC735/2015 pilot copper cable design and all technical x details

3

Specify Pilot Copper Cable Terminal Box details x (drawings and fixing details) and location

4

Specify Telecom Barrier Transformers Terminal Box color to match with telecom equipment

5

Specify Pilot copper cable routing from basement to x telecom room

6

Installation of Pilot Copper Cable Terminal Box included in the Scope of GTC736/2015

7

Connection and Termination from protection relays to Pilot Copper Cable Terminal Box x (including Protection Barrier Transformer)

GTC-735 SCOPE OF WORKS R0

x

x

x

x

x

TECHNICAL AFFAIRS Electricity Projects Dept.

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TO BE PROVIDED BY

Sl.No

INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

8

Connection and Termination from Telecom Equipment to Pilot Copper Cable Terminal Box (including Telecom Barrier Transformer)

9

Termination of all GTC735/2015 SS copper cables at Pilot Copper Cable Terminal Box including E-E test (Copper cable E2E test x shall include at least the following tests: Continuity test, Isolation test, Attenuation test, Near End Crosstalk, Far End Crosstalk)

10

Termination of all GTC736/2015 copper cables at Pilot Copper Cable Terminal Box including E-E test (Copper cable E2E test shall include at least the following tests: Continuity test, Isolation test, Attenuation test, Near End Crosstalk, Far End Crosstalk)

11

Milestones for Copper Cable laying, termination & end-to- x end testing

F

NCC / ENCC CONNECTIONS

1

Configuration and testing of SCS for transfer of signals to x control centers from substation*

GTC-735 SCOPE OF WORKS R0

/

CABLE CONTRACTOR

TELECOM CONTRACTOR

x

x

DCC

TECHNICAL AFFAIRS Electricity Projects Dept.

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INTERFACE POINT SUBSTATION DESCRIPTION / REQUIRED CONTRACTOR ACTIVITY

CABLE CONTRACTOR

TELECOM CONTRACTOR

* NOTE: Configuration and testing of PCS (SCADA) from Control centers is part of separate contract by ALSTOM G

ONLINE MONITORING SYSTEM (OMS)

1

Configuration and E-E testing of telecommunication channels for OMS

2

Configuration and E-E testing x of Remote access for OMS

GTC-735 SCOPE OF WORKS R0

x

TECHNICAL AFFAIRS Electricity Projects Dept.