Typical Transformer Test Report
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CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 1 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS
1. Location & Feeder Name: FOPH
2. Equipment Details
:
Make
: KANOHAR
Type of cooling
: ONAN
Rating (KVA )
: 2000
HV Volts
: 11000
PH
LV Volts
: 433
Freq: 50 HZ
%Z
: 10%
Vector Group
: Dyn1
HV Rated Current
: 105A
LV Rated Current
: 2666.7A
Sl.No.
: KT-2000 / 154
Temp Rise Oil
: 50 ºC
Temp Rise Winding
: 55 ºC
Mfg Year
: 2012
: 3
3. General Inspection : OK
4. Insulation Resistance Test: Ref HV to Earth 5000V LV to Earth 500V HV to LV 5000V
Test Performed by IMC Name : Design : Signature & Date
15 SEC 2.3G 1.48G 2.78G
60 SEC 3.70G 1.70G 4.75G
600 SEC 5.58G 2.32G 6.01
PI 1.57 1.37 1.27
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 2 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS 5. Ratio Test : Tap
Applied HV Volts
Measured LV Volts
Measured LV Volts
Position 1U1V
1V1W
1W1U
2U2V
2V2W
2W2U
2U-N
2V-N
2W-N
1
415
416
415
15.64
15.72
15.78
9.01
9.02
9.04
2
413
415
416
16.24
16.25
16.21
9.36
9.36
9.30
3
416
416
415
16.65
16.48
16.49
9.57
9.56
9.55
4
417
415
417
16.96
16.98
16.97
9.73
9.75
9.80
5
415
416
417
17.28
17.45
16.46
9.81
9.94
9.96
6. Magnetising Current Test :
Applied Volts ( HV Side ) 1U1V 413
1V1W 417
1W1U 412
Measured Current in Ma 1U 11.9mA
1V 7.9mA
1W
7.6mA
7.Magnetic Balance Test :
Applied Voltage in Primary
Measured Voltage in Secondary
1U1V
1V1W
1W1U
2U2V
2V2W
2W2U 2UN
2VN
2WN
209.4
413
211.8
14.45
14.39
0.144
4.94
9.34
5.01
116.2
314
417
16.66
4.67
11.65
9.36
7.14
2.42
415
316.7
104.2
4.56
16.75
11.46
2.46
7.26
9.56
8.Winding Resistance Test : Test Performed by IMC Name : Design : Signature & Date
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 3 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS
Tap Position
HV Side ( mΩ )
Measured Values 1V1W 1W1U 707.5 706.3
1
1U1V 709.2
2
700.2
699.2
701.3
3
685.8
686.6
685.3
4
664.2
665.8
664.2
5
647.5 2U2N
647.9 2V2N
648.8 2W2N
3
0.3
0.4
0.4
LV Side( mΩ )
9.Vector Group Test : Dyn1 Applied Volts 1U-1V = 400V 1V-1W =416V
1U,2U
1W-1U =419V
Test Performed by IMC Name : Design : Signature & Date
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 4 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS Conditions to be Satisfied 1) 1U-1W = ( 1U-N ) + (1W-N )
2w
2n
W
418V=10.06V+408.2V
2v
2) 1U-2W = 1U-2V 403V=403V 3)1V-2V < 1V-2W 409V<423V
1V
1W 10. Functional Checks 1
OTI
2
WTI
3
: Alarm Trip Alarm
OK OK OK
Trip
OK
Buchholz Relay
OK
Alarm 4
Low Oil Level
Trip
OK
Alarm
OK
1. WTI CT : RATIO
: 2667 / 1.5 A
VA : 7.5
CLASS : 5.0
IR TEST: Primary-Secondary: not possible Resistance: Test Performed by IMC Name : Design : Signature & Date
Secondary-Earth
: 248 MΩ
S1-S2:4.2 Ω Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 5 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS
2. NCT: RATIO
: 3150 / 1 A
CLASS : PS
Vk : (40 RCT+200 V) I e =<30 mA @ Vk / 2 (i) Insulation Resistance Test : C1 – C2
-6.7 M
C1 – E - 7.06 M C2 – E - 1.8 M
(ii)
Winding Resistance
:
C1 – 12.5Ω C2 – 19.7 Ω
(iii) Polarity Test
:
(iv) Ratio Test
:
Applied current in primary
OK 3150 / 1A
Measured Current in Secondary Core 1
Core 2
315
100 mA
100.0mA
787.6
0.26A
0.26A
1575
0.5
0.49
Saturation Test for NCT : Test Performed by IMC Name : Design : Signature & Date
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 6 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS Vk: ≥ (40RCT+200V) Ie : <30mA@ Vk ∕ 2=310 V Injected Voltage in sec (volts) 123.5 247 370.5 494 543.4
Test Performed by IMC Name : Design : Signature & Date
Measured Current in sec (mA) 0.62 1.13 1.52 1.93 2.08
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
DATE :13/07/2013 Sheet No 1 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS
1. Location & Feeder Name: FOPH
2. Equipment Details
:
Make
: KANOHAR
Type of cooling
: ONAN
Rating (KVA )
: 2000
HV Volts
: 11000
PH
LV Volts
: 433
Freq: 50 HZ
%Z
: 10%
Vector Group
: Dyn1
HV Rated Current
: 105A
LV Rated Current
: 2666.7A
Sl.No.
: KT-2000 / 154
Temp Rise Oil
: 50 ºC
Temp Rise Winding
: 55 ºC
Mfg Year
: 2012
: 3
3. General Inspection : OK
4. Insulation Resistance Test: Ref HV to Earth 5000V LV to Earth 500V HV to LV 5000V
Test Performed by IMC Name : Design : Signature & Date
15 SEC 2.3G 1.48G 2.78G
60 SEC 3.70G 1.70G 4.75G
600 SEC 5.58G 2.32G 6.01
PI 1.57 1.37 1.27
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 2 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS 5. Ratio Test : Tap
Applied HV Volts
Measured LV Volts
Measured LV Volts
Position 1U1V
1V1W
1W1U
2U2V
2V2W
2W2U
2U-N
2V-N
2W-N
1
415
416
415
15.64
15.72
15.78
9.01
9.02
9.04
2
413
415
416
16.24
16.25
16.21
9.36
9.36
9.30
3
416
416
415
16.65
16.48
16.49
9.57
9.56
9.55
4
417
415
417
16.96
16.98
16.97
9.73
9.75
9.80
5
415
416
417
17.28
17.45
16.46
9.81
9.94
9.96
6. Magnetising Current Test :
Applied Volts ( HV Side ) 1U1V 413
1V1W 417
1W1U 412
Measured Current in Ma 1U 11.9mA
1V 7.9mA
1W
7.6mA
7.Magnetic Balance Test :
Applied Voltage in Primary
Measured Voltage in Secondary
1U1V
1V1W
1W1U
2U2V
2V2W
2W2U 2UN
2VN
2WN
209.4
413
211.8
14.45
14.39
0.144
4.94
9.34
5.01
116.2
314
417
16.66
4.67
11.65
9.36
7.14
2.42
415
316.7
104.2
4.56
16.75
11.46
2.46
7.26
9.56
8.Winding Resistance Test : Test Performed by IMC Name : Design : Signature & Date
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 3 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS
Tap Position
HV Side ( mΩ )
Measured Values 1V1W 1W1U 707.5 706.3
1
1U1V 709.2
2
700.2
699.2
701.3
3
685.8
686.6
685.3
4
664.2
665.8
664.2
5
647.5 2U2N
647.9 2V2N
648.8 2W2N
3
0.3
0.4
0.4
LV Side( mΩ )
9.Vector Group Test : Dyn1 Applied Volts 1U-1V = 400V 1V-1W =416V
1U,2U
1W-1U =419V
Test Performed by IMC Name : Design : Signature & Date
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 4 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS Conditions to be Satisfied 1) 1U-1W = ( 1U-N ) + (1W-N )
2w
2n
W
418V=10.06V+408.2V
2v
2) 1U-2W = 1U-2V 403V=403V 3)1V-2V < 1V-2W 409V<423V
1V
1W 10. Functional Checks 1
OTI
2
WTI
3
: Alarm Trip Alarm
OK OK OK
Trip
OK
Buchholz Relay
OK
Alarm 4
Low Oil Level
Trip
OK
Alarm
OK
1. WTI CT : RATIO
: 2667 / 1.5 A
VA : 7.5
CLASS : 5.0
IR TEST: Primary-Secondary: not possible Resistance: Test Performed by IMC Name : Design : Signature & Date
Secondary-Earth
: 248 MΩ
S1-S2:4.2 Ω Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 5 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS
2. NCT: RATIO
: 3150 / 1 A
CLASS : PS
Vk : (40 RCT+200 V) I e =<30 mA @ Vk / 2 (i) Insulation Resistance Test : C1 – C2
-6.7 M
C1 – E - 7.06 M C2 – E - 1.8 M
(ii)
Winding Resistance
:
C1 – 12.5Ω C2 – 19.7 Ω
(iii) Polarity Test
:
(iv) Ratio Test
:
Applied current in primary
OK 3150 / 1A
Measured Current in Secondary Core 1
Core 2
315
100 mA
100.0mA
787.6
0.26A
0.26A
1575
0.5
0.49
Saturation Test for NCT : Test Performed by IMC Name : Design : Signature & Date
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
CLIENT : M/s. Bharat Heavy Electricals Ltd- PSER.
DATE :13/07/2013 Sheet No 6 of 5
PROJECT-2X520 MW HNPCL,VIZAG
TEST REPORT FOR TRANSFORMERS Vk: ≥ (40RCT+200V) Ie : <30mA@ Vk ∕ 2=310 V Injected Voltage in sec (volts) 123.5 247 370.5 494 543.4
Test Performed by IMC Name : Design : Signature & Date
Measured Current in sec (mA) 0.62 1.13 1.52 1.93 2.08
Witnessed by MEL Name
Witnessed by BHEL Name
Witnessed by HNPCL/STEAG Name
Designation Signature & Date
Designation Signature & Date
Designation Signature & Date
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