60605020 Power Transformers Ms 009

METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER POWER GENERATION & DISTRIBUTION FACILITY AT DALEEL FIELD(DALEEL 06-255)

Document ref: No.: LTEM/DP/MS/ELE-09 Rev.0 Page No 1 of 6

METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER

Prepared By (LTEM) Reviewed By (LTEM) Approved by (LTEM) Approved By (Daleel)

Name

Date

G. Prasanth Kumar Reddy

5.4.2 011

Devraj Kingsly

5.4.2 011

P.GovindRaj

6.4.2 011

Yousuf Al Harooni

Signature

METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER POWER GENERATION & DISTRIBUTION FACILITY AT DALEEL FIELD(DALEEL 06-255)

LIST OF CONTENTS 1. PURPOSE 2. SCOPE 3. DOCUMENT REFERENCE 4. TOOLS AND PLANTS REQUIRED 5. RESPONSIBILITIES 6. PROCEDURE 7. INSPECTION AND TESTING 8. SAFETY

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METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER POWER GENERATION & DISTRIBUTION FACILITY AT DALEEL FIELD(DALEEL 06-255)

Document ref: No.: LTEM/DP/MS/ELE-09 Rev.0 Page No 3 of 6

1.0 PURPOSE The purpose of this method statement is to describe the procedure to be adopted during installation of Power Transformer. 2.0 SCOPE This procedure shall be applicable for installation and pre-commissioning of Power Transformer of EPC of POWER GENERATION DISTRIBUTION SYSTEM at Daleel Field. 3.0 REFERENCE 1. 2. 3. 4. 5.

Contract documents General arrangement Drawings Manufacturer’s Installation Manual Vendor Drawing Operation and Maintenance Manual Any modification done as per the site condition apart from the \ifc shall be incorporated in as built drawing.

4.0 TOOLS AND PLANTS REQUIRED 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.

Oil Filtration Machine 7 ton truck 50 ton crane Secondary Injection Kit BDV testing Kit Winding Resistance tester Multimeter FLUKE MAKE Megger 5000v Cable jointing tool kit Tool Box Crimping Tool &Die Set Torque Wrench Compound Gauge Temperature Gauge.

5.0 RESPONSIBLITY 5.1 QA/QC ENGINEER a. b.

Ensure all materials are inspected prior to utilizing at site. Ensure the availability of required technical documents like approved method statement, IFC Drawings at work place.

METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER

Document ref: No.: LTEM/DP/MS/ELE-09 Rev.0

POWER GENERATION & DISTRIBUTION FACILITY AT DALEEL FIELD(DALEEL 06-255)

c. d. e.

Page No 4 of 6

Responsible for carrying out Stage inspections and surveillance inspections in accordance with ITP and as per the project requirement. Ensure the work is done by the qualified person (Ex. Cable Jointer). Responsible for ensuring the all Testing activities are according to project requirement.

5.2 ELECTRICAL ENGINEER Electrical Engineer shall be overall responsible for the safe execution of complete activity including but not limited to. a. b. c. d.

Conforming the installation works as per the schedule. Organizing tools and equipment required for the work. Assigning work crew. Conforming the materials handling in safe manner.

5.3 SAFETY SUPERVISOR The Safety supervisor shall be responsible for safe execution at site. a. Ensure for effective tool box talk. b. Ensure all the PPEs are available at site and are using correct PPE. c. Ensure the first aid box available at site. d. Ensure the adequate fire extinguishers are available at site. e. Ensure the required warning signs and boards are available at necessary place f. Ensure only required people are available at site. 6.0 PROCEDURE – POWER TRANSFORMER INSTALLATION 6.1 General Requirements -

Ensure the Transformer has been inspected and approved by Client. Transformer installation, testing &commissioning work will be carried out as per the Client &Vendor recommendation. Under any circumstances the Power Transformer shall not be forcefully handled. House Keeping will be done on daily basis.

6.2 Visual Inspection After receiving the equipments it shall be inspected at store for any abnormalities and damages. If anything found it shall be reported to Contract Manager/Stores for necessary action. -

Locations of cables entry for equipments shall be visually inspected with respect to trenches, switch racks.

6.3 INSTALLATION OF POWER AND AUXILLARY TRANSFORMER

METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER POWER GENERATION & DISTRIBUTION FACILITY AT DALEEL FIELD(DALEEL 06-255)

Document ref: No.: LTEM/DP/MS/ELE-09 Rev.0 Page No 5 of 6

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Transformer shall be either collected from the stores or other place, or received directly from manufacturer’s works.

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After receiving the equipments inspect for any abnormalities and damages, If any, inform LTEM Construction Manager / Stores for necessary action.

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The foundation for transformer shall be made ready before installation. Verify the cable entry for HV, LV and control cables as per approved drawings.

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Transformer weighing more than 30 tons is normally installed by specialized erection contractor. Transformer up to 30 tons is installed by LTEM using the crane and other lifting facilities.

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Transformer shall be positioned centrally on foundation blocks, and clearances shall be checked.

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Transformer shall be finally positioned for line and level to the dimensions given in the drawings.

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Care shall be taken in positioning in relation to cable, cable duct and busbar trunking positions.

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Transformer more than 10MVA capacity are supplied with main tank separately. Radiators and conservators and topping up oil will be supplied in separate containers/drums.

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Once the transformer is on foundation, oil in drums for topping up is tested for its BDV and the values recorded against drum no. The top, bottom and OLTC sample is taken and BDV recorded. If the above values are accepted, assembling of radiators and conservator tank can be started.

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It is recommended; the filling of oil shall be through a vacuum filtration plant with heating facilities and filtered. Oil shall be circulated at least 24 hrs or until oil temp reaches steady state value.

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BDV of oil is verified once the filtration plant is off and the value recorded. Once the transformer is cooled to ambient temp oil level is adjusted as per manufacturer’s recommendation.

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Trapped air in the main tank, radiators, OLTC tank is released through the air release plugs provided. All valves except sampling & drain valves shall be opened.

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HV, LV and Control cabling as applicable and terminations shall be completed as per approved schedule.

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Earthing of transformer body and neutral shall be completed.

METHOD STATEMENT FOR INSTALLATION OF POWER TRANSFORMER POWER GENERATION & DISTRIBUTION FACILITY AT DALEEL FIELD(DALEEL 06-255)

Document ref: No.: LTEM/DP/MS/ELE-09 Rev.0 Page No 6 of 6

6.4 Verification Documents - Approved Drawings 7.0

INSPECTION AND TESTING

- Transformer Visual inspection and Storage condition. - Transformer installation inspection as per Construction Check Sheet for Power and Auxiliary Transformer Form No.11, 17. - Transformer Pre-commissioning Tests as per Functional Test Sheet for Power and Auxiliary Transformer Form No 28, 35, and 36. 8.0 -

SAFETY Ensure that all PPE’s are available with the crew involved in the job. All equipment and tools should be checked before starting of the activity for suitability and integrity. Ensure that housekeeping is being carried out before and after work on a daily basis.