NS ENGINEERS

69-A, Pushpraj Complex, Jashoda Cross Road,

Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
11KV HT Panel No.2, TO 11KV DC LINE – 1
Location Comp. Code 001
(TO POWER HOUSE-1)
1.0 C.T. SPECIFICATION AND NAME PLATE DETAILS:
Phase Make Mfg. Year Sr. No.
R INSTRANS 2020/11 A46319
Y INSTRANS 2020/11 A46327
B INSTRANS 2020/11 A46321
Core C.T. Ratio VA Of Core Class of core
1 600/1 A 10 0.2
2 600/1 A 10 0.2
3 600/1 A 10 5P

2.0 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5KV SONAL CU1664

2.1 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Phase reference
Core reference
R Y B
Primary – Earth 62.12 GΩ 55.32 GΩ 44.86 GΩ
Phase reference
Core reference
R Y B
Primary - Core – I 98.25 GΩ 84.54 GΩ 92.4 GΩ
Primary - Core – II 92.64 GΩ 89.65 GΩ 141.2 GΩ
Primary - Core – III 102.36 GΩ 96.78 GΩ 124.7 GΩ

2.2 Secondary to Earth Applied Voltage: 500V

Phase reference
Core reference
R B
Core – I – Earth 40.2 GΩ 124.6 GΩ 96.8 GΩ
Core – II – Earth 75.6 GΩ 86.3 GΩ 92.3 GΩ
Core – III – Earth 96.5 GΩ 94.1 GΩ 86.5 GΩ

2.3 Secondary to Secondary Applied Voltage: 500V

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
1
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

Phase reference
Core reference
R Y B
Core – I to Core – II 35.2 GΩ 56.52 GΩ 35.7 GΩ
Core – I to Core – III 48.2 GΩ 44.43 GΩ 52.45 GΩ
Core – II to Core – III 35.89 GΩ 56.3 GΩ 42.31 GΩ

2.4 SECONDARY WINDING RESISTANCE TEST:

Core Ratio R Y B
Core I 600/1 A 2.3 Ω 2.4 Ω 2.3 Ω
Core II 600/1 A 2.4 Ω 2.5 Ω 2.3 Ω
Core III 600/1 A 2.8 Ω 2.8 Ω 2.7 Ω

2.5 C.T. POLARITY TEST:Connect + ve at P1 and –ve at P2

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 600/1 A 1S1-1S2 OK OK OK
Core II 600/1 A 2S1-2S2 OK OK OK
Core III 600/1 A 3S1-3S2 OK OK OK

2.6 C.T. RATIO TEST:

Primary Measured Secondary Current IS
Core Ratio Terminal Applied
Current IP R Y B
Core I 600/1 A 1S1-1S2 150 A / 0.25/ 0.48/ 1.00 A 0.25/ 0.48/ 1.01 A 0.24/ 0.48/ 1.00 A
Core II 600/1 A 2S1-2S2 300 A / 0.25/ 0.50/ 1.00 A 0.25/ 0.48/ 1.01 A 0.25/ 0.50/ 1.00 A
Core III 600/1 A 3S1-3S2 600 A 0.25/ 0.49/ 1.01 A 0.25/ 0.49/ 1.03 A 0.25/ 0.49/ 1.01 A

3.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
2
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 04/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV HT Panel No.3, INCOMING FROM GENERATOR – 1 Comp. Code 002

1.0 C.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/2 A46301
Y INSTRANS 2016/2 A46299
B INSTRANS 2016/2 A46307
Knee Point Iexc(max)at
Core C.T. Ratio VA Of Core Class of core Rct (Ω)
Voltage VK/2 mA
1 300/1 A 15 5P - - -
2 300/1 A - PS 200 V 30 mA 3Ω
3 300/1 A 15 0.2 - - -

2.0 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5 KV SONEL CU1664

2.1 Primary to Secondary Applied Voltage: 5KV

Core reference Phase reference
R Y B
Primary - Core – I 18.1 GΩ 16.2 GΩ 20.3 GΩ
Primary - Core – II 17.2 GΩ 18.1 GΩ 24.8 GΩ
Primary - Core – III 15.6 GΩ 14.6 GΩ 24.6 GΩ

2.2 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 26.2 GΩ 22.3 GΩ 41.2 GΩ
Core – II – Earth 73.4 GΩ 28.3 GΩ 38.1 GΩ
Core – III – Earth 61.2 GΩ 48.2 GΩ 120.7 GΩ

2.3 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 68.1 GΩ 48.2 GΩ 86.1 GΩ
Core – I to Core – III 52.1 GΩ 58.7 GΩ 78.9 GΩ
Core – II to Core – III 132.2 GΩ 43.2 GΩ 52.6 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
3
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.4 SECONDARY WINDING RESISTANCE TEST:

Core Ratio R Y B
Core I 300/1 A 2.2 Ω 2.4 Ω 2.5 Ω
Core II 300/1 A 2.7 Ω 2.7 Ω 2.7 Ω
Core III 300/1 A 3.3 Ω 3.3 Ω 3.4 Ω

2.5 C.T. POLARITY TEST: Connect + ve at P1 and –ve at P2

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 300/1 A 1S1-1S2 OK OK OK
Core II 300/1 A 2S1-2S2 OK OK OK
Core III 300/1 A 3S1-3S2 OK OK OK

2.6 C.T. RATIO TEST:

Primary Measured Secondary Current IS
Core Ratio Terminal Applied
Current IP R Y B
0.34/0.67/1.01 0.33/0.67/1.01 0.34/0.67/1.01
Core I 300/1 A 1S1-1S2
A A A
100 A /
0.33/0.67/1.01 0.34/0.66/1.01 0.34/0.67/1.01
Core II 300/1 A 2S1-2S2 200 A /
A A A
300 A
0.34/0.67/1.02 0.34/0.67/1.01 0.34/0.67/1.03
Core III 300/1 A 3S1-3S2
A A A

2.7 MAGNETIZATION CHARACTERISTICS TEST:

Reference Phase reference
Knee Point Leakage Current Ma
Core Applied Voltage V
Voltage R(mA) Y(mA) B(mA)
20 2.0 1.8 2.1
40 2.8 2.7 3.2
60 3.7 3.3 4.5
80 4.3 4.0 5.7
100 5.3 4.4 6.6
2S1-2S2 200 V 120 6.4 5.8 7.9
140 8.8 8.0 10.3
160 17.0 16.7 19.4
180 0.82 A 0.4 A 1.17 A
200 4.06 A 6.23 A 5.93 A
220 5.99 A 8.21 A 7.21 A
Knee - point Voltage Kpv = 200 V
Excitation - current Iex VK/2 = 30 mA

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
4
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

3.0 REMARKS : TESTED AND FOUND CORE-2 PS CLASS CT KNEE POINT LEAKAGE CURRENT IS
HIGH.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
5
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV HT Panel No.5, BUS COUPLER Comp. Code 003

1.0 C.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 08/22 FF/22-1063
Y INSTRANS 08/22 FF/22-1064
B INSTRANS 2016/2 A46314
Core C.T. Ratio VA Of Core Class of core
1 300/1 A 10 0.2
2 300/1 A 10 5P20

2.0 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5 KV SONEL CU1664

2.1 Primary to Secondary Applied Voltage: 5KV

Core reference Phase reference
R Y B
Primary - Core – I 20.12 GΩ 19.89 GΩ 21.21 GΩ
Primary - Core – II 29.13 GΩ 21.23 GΩ 21.21 GΩ

2.2 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 28.74 GΩ 29.33 GΩ 37.42 GΩ
Core – II – Earth 22.93 GΩ 29.44 GΩ 30.22 GΩ

2.3 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 98.54 GΩ 72.35 GΩ 66.55 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
6
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.4 SECONDARY WINDING RESISTANCE TEST:

Core Ratio R Y B
Core I 300/1 A 1.0 Ω 0.9 Ω 1.6 Ω
Core II 300/1 A 1.9 Ω 2.0 Ω 1.5 Ω

2.5 C.T. POLARITY TEST: Connect + ve at P1 and –ve at P2

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 300/1 A 1S1-1S2 OK OK OK
Core II 300/1 A 2S1-2S2 OK OK OK
Core III 300/1 A 3S1-3S2 OK OK OK

2.6 C.T. RATIO TEST:

Primary Measured Secondary Current IS
Core Ratio Terminal Applied
Current IP R Y B
0.34/0.67/1.01 0.33/0.67/1.01 0.34/0.67/1.01
Core I 300/1 A 1S1-1S2
A A A
100 A /
0.33/0.67/1.01 0.34/0.66/1.01 0.34/0.67/1.01
Core II 300/1 A 2S1-2S2 200 A /
A A A
300 A
0.34/0.67/1.01 0.33/0.67/1.01 0.33/0.68/1.03
Core III 300/1 A 3S1-3S2
A A A

3.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
7
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 04/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV HT Panel No.7, INCOMING FROM GENERATOR – 2 Comp. Code 004

1.0 C.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/2 A46305
Y INSTRANS 2016/2 A46306
B INSTRANS 2016/2 A46302
VA Of Class of Knee Point Iexc(max)at
Core C.T. Ratio Rct (Ω)
Core core Voltage VK/2 mA
1 300/1 A 15 5P
2 300/1 A - PS 200 V 30 mA 3Ω
3 300/1 A 15 0.2

2.0 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5 KV SONEL CU1664

2.1 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Core reference Phase reference
R Y B
Primary - Core – I 29.10 GΩ 33.48 GΩ 36.59 GΩ
Primary - Core – II 30.01 GΩ 30.43 GΩ 36.92 GΩ
Primary - Core – III 25.58 GΩ 34.41 GΩ 32.58 GΩ

2.2 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 14.10 GΩ 22.33 GΩ 24.43 GΩ
Core – II – Earth 450.3 GΩ 484.4 GΩ 369.77 GΩ
Core – III – Earth 63.40 GΩ 43.47 GΩ 150.4 GΩ

2.3 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 72.11 GΩ 50.0 GΩ 72.33 GΩ
Core – I to Core – III 126.33 GΩ 66.69 GΩ 56.73 GΩ
Core – II to Core – III 30.59 GΩ 56.09 GΩ 52.44 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
8
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.4 SECONDARY WINDING RESISTANCE TEST:

Core Ratio R Y B
Core I 300/1 2.7 Ω 2.6 Ω 2.4 Ω
Core II 300/1 2.6 Ω 2.6 Ω 2.6 Ω
Core III 300/1 3.4 Ω 3.3 Ω 3.5 Ω

2.5 C.T. POLARITY TEST: Connect + ve at P1 and –ve at P2

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 300/1 1S1-1S2 OK OK OK
Core II 300/1 2S1-2S2 OK OK OK
Core III 300/1 3S1-3S2 OK OK OK

2.6 C.T. RATIO TEST:

Primary Measured Secondary Current IS
Applied
Core Ratio Terminal
Current R Y B
IP
Core I 300/1 1S1-1S2 167/335/990 mA 165/335/990 mA 164/335/990 mA
50 A /
Core II 300/1 2S1-2S2 164/335/990 mA 167/334/990 mA 167/334/990 mA
100 A /
300 A 167/335/1010 167/335/1012
Core III 300/1 3S1-3S2 167/335/990 mA
mA mA

2.7 MAGNETIZATION CHARACTERISTICS TEST:

Reference Phase reference
Knee Point Leakage Current Ma
Core Applied Voltage V
Voltage R(mA) Y(mA) B(mA)
20 2.8 2.5 3.8
40 3.9 3.6 4.9
60 4.5 4.0 7.5
80 5.5 4.8 8.7
100 6.4 5.7 10.5
2S1-2S2 200 V
120 7.9 7.7 13.2
140 10.2 10.2 16.7
160 16.9 17.4 20.8
180 500 380 0.29 A
200 6A 5.4 A 5.66 A
Knee - point Voltage Kpv = 200 V
Excitation - current Iex VK/2 = 30 mA

3.0 REMARKS : TESTED AND FOUND CORE-2 PS CLASS CT KNEE POINT LEAKAGE CURRENT IS
HIGH.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
9
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 04/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
11KV HT Panel No.9, TO 11KV DC LINE – 2
Location Comp. Code 005
(TO POWER HOUSE-1)

1.0 C.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/2 A46326
Y INSTRANS 2016/2 A46317
B INSTRANS 2016/2 A46322
Core C.T. Ratio VA Of Core Class of core
1 600/1 A 10 0.2
2 600/1 A 10 0.2
3 600/1 A 10 5P

2.0 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5 KV SONEL CU1664

2.1 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Core reference Phase reference
R Y B
Primary – Earth 51.17 GΩ 51.32 GΩ 55.12 GΩ
Core reference Phase reference
R Y B
Primary - Core – I 81.31 GΩ 96.12 GΩ 105.21 GΩ
Primary - Core – II 83.22 GΩ 94.14 GΩ 103.36 GΩ
Primary - Core – III 86.24 GΩ 90.12 GΩ 105.42 GΩ

2.2 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 61.32 GΩ 128.1 GΩ 98.7 GΩ
Core – II – Earth 97.22 GΩ 87.2 GΩ 71.2 GΩ
Core – III – Earth 108.2 GΩ 92.1 GΩ 78.9 GΩ

2.3 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 41.31 GΩ 36.21 GΩ 29.02 GΩ
Core – I to Core – III 28.24 GΩ 56.24 GΩ 35.55 GΩ
Core – II to Core – III 38.91 GΩ 30.71 GΩ 33.18 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
10
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.4 SECONDARY WINDING RESISTANCE TEST:

Core Ratio R Y B
Core I 600/1 A 2.6 Ω 2.6 Ω 2.7 Ω
Core II 600/1 A 2.8 Ω 2.7 Ω 2.7 Ω
Core III 600/1 A 2.6 Ω 2.5 Ω 2.6 Ω

2.5 C.T. POLARITY TEST: Connect + ve at P1 and –ve at P2

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 600/1 A 1S1-1S2 OK OK OK
Core II 600/1 A 2S1-2S2 OK OK OK
Core III 600/1 A 3S1-3S2 OK OK OK

2.6 C.T. RATIO TEST:

Primary Measured Secondary Current IS
Core Ratio Terminal Applied
Current IP R Y B
160/338/838 162/338/838
Core I 600/1 A 1S1-1S2 167/338/838 mA
mA mA
100 A /
160/338/838 162/340/838
Core II 600/1 A 2S1-2S2 200 A / 167/340/838 mA
mA mA
500 A
160/338/840 162/338/838
Core III 600/1 A 3S1-3S2 167/338/838 mA
mA mA

3.0 REMARKS: Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
11
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL (PT) NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
11KV HT Panel No.2, TO 11KV DC LINE – 1
Location Comp. Code 001
(TO POWER HOUSE-1), PT

1.0 P.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/1 Z22807
Y INSTRANS 2016/1 Z22800
B INSTRANS 2016/1 Z22804
Core P.T. Ratio VA Of Core Class of core
1 11KV/√3/110V/√3 50 0.2
2 11KV/√3/110V/√3 50 3P
3 11KV/√3/110V/√3 50 3P

1.1 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5 KV SONAL CU1664

1.2 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Phase reference
Core reference
R Y B
Primary – Earth 52.31 GΩ 33.25 GΩ 212.3 GΩ
Phase reference
Core reference
R Y B
Primary - Core – I 45.28 GΩ 1.85 TΩ 563.7 GΩ
Primary - Core – II 268.8 GΩ 1.063 TΩ 1.268 TΩ
Primary - Core – III 234.7 GΩ 631.1 GΩ 1.704 TΩ

1.3 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 213.4 GΩ 46.2 GΩ 329.6 GΩ
Core – II – Earth 62.5 GΩ 48.4 GΩ 92.5 GΩ
Core – III – Earth 47.6 GΩ 96.2 GΩ 87.1 GΩ

1.4 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 46.3 GΩ 62.1 GΩ 52.54GΩ
Core – II to Core – III 65.62 GΩ 45.2 GΩ 44.2 GΩ
Core – I to Core – III 68.41 GΩ 49.6 GΩ 53.8 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
12
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.0 P.T. POLARITY TEST: Connect + ve at P1 and –ve at N

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 11KV/√3/110V/√3 1a-1n OK OK OK
Core II 11KV/√3/110V/√3 2a-2n OK OK OK
Core III 11KV/√3/110V/√3 3a-3n OK OK OK

2.1 P.T. RATIO TEST:

Applied Voltage-500V Applied Voltage-1000V
Core Ratio Terminal
R Y B R Y B
11KV/√3/110V/
Core I 1a-1n 5.02 5.09 5.01 10.13 10.06 10.09
√3
11KV/√3/110V/
Core II 2a-2n 5.03 5.07 5.01 10.11 10.05 10.02
√3
11KV/√3/110V/
Core III 3a-3n 5.02 5.05 5.02 10.03 10.08 10.07
√3

2.2 SECONDARY WINDING RESISTANCE TEST:

Phase reference
Core Ratio Terminal
R Y B
Core I 11KV/√3/110V/√3 1a-1n 96.0 mΩ 95.7 mΩ 95.9 mΩ
Core II 11KV/√3/110V/√3 2a-2n 462 mΩ 468 mΩ 421 mΩ
Core III 11KV/√3/110V/√3 3a-3n 500 mΩ 476 mΩ 489 mΩ

3.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
13
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL (PT) NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV HT Panel No.4, BUS PT-1 Comp. Code 002

1.0 P.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/1 Z22820
Y INSTRANS 2016/1 Z22812
B INSTRANS 2016/1 Z22814
Core P.T. Ratio VA Of Core Class of core
1 11KV/√2/110V/√3 100 3P
2 11KV/√2/110V/√3 100 0.2
3 11KV/√2/110V/√3 100 3P

1.1 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5KV SONAL CU1664

1.2 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Phase reference
Core reference
R Y B
Primary – Earth 125.9 GΩ 135.4 GΩ 105.22 GΩ
Phase reference
Core reference
R Y B
Primary - Core – I 278.42 GΩ 749.71 GΩ 207.6 GΩ
Primary - Core – II 178.21 GΩ 229.7 GΩ 230.5 GΩ
Primary - Core – III 189.39GΩ 322.32 GΩ 135.2 GΩ

1.3 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 9.85 GΩ 26.72 GΩ 35.60 GΩ
Core – II – Earth 24.59 GΩ 49.69 GΩ 44.41 GΩ
Core – III – Earth 74.53 GΩ 63.51 GΩ 46.19 GΩ

1.4 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 45.31 GΩ 68.41 GΩ 131.7 GΩ
Core – II to Core – III 29.92 GΩ 45.22 GΩ 85.89 GΩ
Core – III to Core – I 49.54 GΩ 20.37 GΩ 95.46 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
14
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.0 P.T. POLARITY TEST: Connect + ve at P1 and –ve at N

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 11KV/√2/110V/√3 1a-1n OK OK OK
Core II 11KV/√2/110V/√3 2a-2n OK OK OK
Core III 11KV/√2/110V/√3 3a-3n OK OK OK

2.1 P.T. RATIO TEST:

Applied voltage-500V Applied voltage-1000V
Core Ratio Terminal
R (V) Y(V) B(V) R Y B
Core I 11KV/√2/110V/√3 1a-1n 5.03 5.01 5.04 10.08 10.02 10.03
Core II 11KV/√2/110V/√3 2a-2n 5.03 5.01 5.02 10.07 10.01 10.10
Core III 11KV/√2/110V/√3 3a-3n 5.02 5.04 5.01 10.05 10.09 10.08

2.2 SECONDARY WINDING RESISTANCE TEST:

Phase reference
Core Ratio Terminal
R Y B
11KV/√2/110V/ 57 mΩ 59 mΩ 58 mΩ
Core I 1a-1n
√3
11KV/√2/110V/ 472 mΩ 473 mΩ 471 mΩ
Core II 2a-2n
√3
11KV/√2/110V/ 486 mΩ 483 mΩ 485 mΩ
Core III 3a-3n
√3

3.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
15
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL (PT) NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV HT Panel No.6, BUS PT-2 Comp. Code 003

1.0 P.T. SPECIFICATION AND NAME PLATE DETAILS:

Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/2 Z22822
Y INSTRANS 2016/2 Z22818
B INSTRANS 2016/2 Z22813
Core P.T. Ratio VA Of Core Class of core
1 11KV/√2/110V/√3 100 3P
2 11KV/√2/110V/√3 100 0.2
3 11KV/√2/110V/√3 100 3P

1.1 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5KV SONAL CU1664

1.2 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Core reference Phase reference
R Y B
Primary – Earth 67.61 GΩ 72.62 GΩ 82.06 GΩ
Core reference Phase reference
R Y B
Primary - Core – I 576.5 GΩ 452.9 GΩ 433.2 GΩ
Primary - Core – II 810.9 GΩ 551.7 GΩ 687.84 GΩ
Primary - Core – III 1.218 TΩ 934.5 GΩ 1.124 TΩ

1.3 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 76.37 GΩ 42.41 GΩ 62.84 GΩ
Core – II – Earth 103.23 GΩ 97.82 GΩ 82.67 GΩ
Core – III – Earth 52.4 GΩ 58.75 GΩ 98.1 GΩ

1.4 Secondary to Secondary Applied Voltage: 500V

Phase reference
Core reference
R Y B
Core – I to Core – II 61.4 GΩ 64.9 GΩ 69.7 GΩ
Core – II to Core – III 73.4 GΩ 75.2 GΩ 66.3 GΩ
Core – III to Core – I 64.52 GΩ 63.32 GΩ 65.24 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
16
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.0 P.T. POLARITY TEST: Connect + ve at P1 and –ve at N

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 11KV/√2/110V/√3 1a-1n OK OK OK
Core II 11KV/√2/110V/√3 2a-2n OK OK OK
Core III 11KV/√2/110V/√3 3a-3n OK OK OK

2.1 P.T. RATIO TEST:

Applied voltage-500V Applied voltage-1000V
Core Ratio Terminal
R Y B R Y B
Core I 11KV/√2/110V/√3 1a-1n 5.01 5.02 5.01 10.08 10.04 10.05
Core II 11KV/√2/110V/√3 2a-2n 5.03 5.03 5.02 10.07 10.03 10.08
Core III 11KV/√2/110V/√3 3a-3n 5.03 4.99 5.03 10.05 10.04 10.07

2.2 SECONDARY WINDING RESISTANCE TEST:

Phase reference
Core Ratio Terminal
R Y B
Core I 11KV/√2/110V/√3 1a-1n 57 mΩ 473 mΩ 488 mΩ
Core II 11KV/√2/110V/√3 2a-2n 61 mΩ 474 mΩ 488 mΩ
Core III 11KV/√2/110V/√3 3a-3n 58 mΩ 473 mΩ 485 mΩ

3.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
17
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF HT SWITCHGEAR PANEL (PT) NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
11KV HT Panel No.9, TO 11KV DC LINE – 2
Location Comp. Code 004
(TO POWER HOUSE-1), PT
1.0 P.T. SPECIFICATION AND NAME PLATE DETAILS:
Phase Make Mfg. Year Sr. No.
R INSTRANS 2016/1 Z22808
Y INSTRANS 2016/1 Z22803
B INSTRANS 2016/1 Z22805
Core P.T. Ratio VA Of Core Class of core
1 11KV/√3/110V/√3 50 0.2
2 11KV/√3/110V/√3 50 3P
3 11KV/√3/110V/√3 50 3P

1.1 INSULATION RESISTANCE TEST :

Megger Used Make Sr. No.
5 KV SONAL CU1664

1.2 Primary to Earth &Primary to Secondary Applied Voltage: 5KV

Phase reference
Core reference
R Y B
Primary – Earth 1.123 TΩ 49.70 GΩ 30.82 GΩ
Phase reference
Core reference
R Y B
Primary - Core – I 228.1 GΩ 1.121 TΩ 768.1 GΩ
Primary - Core – II 678.1 GΩ 505.5 GΩ 1.799 TΩ
Primary - Core – III 982.2 GΩ 889.1 GΩ 1.02 TΩ

1.3 Secondary to Earth Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I – Earth 78.3 GΩ 89.46 GΩ 69.0 GΩ
Core – II – Earth 89.2 GΩ 92.9 GΩ 82.6 GΩ
Core – III – Earth 69.9 GΩ 78.6 GΩ 97.3 GΩ

1.4 Secondary to Secondary Applied Voltage: 500V

Core reference Phase reference
R Y B
Core – I to Core – II 101.7 GΩ 231.1 GΩ 213.2 GΩ
Core – II to Core – III 80.9 GΩ 291.1 GΩ 271.3 GΩ
Core – I to Core – III 142.9 GΩ 198.2 GΩ 212.2 GΩ

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
18
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

2.0 P.T. POLARITY TEST: Connect + ve at P1 and –ve at N

Phase reference (Forward)
Core Ratio Terminal
R Y B
Core I 11KV/√3/110V/√3 1a-1n OK OK OK
Core II 11KV/√3/110V/√3 2a-2n OK OK OK
Core III 11KV/√3/110V/√3 3a-3n OK OK OK

2.1 P.T. RATIO TEST:

Applied Voltage-500V Applied Voltage-1000V
Core Ratio Terminal
R Y B R Y B
11KV/√3/110V/
Core I 1a-1n 5.01 5.05 5.02 10.01 10.08 10.06
√3
11KV/√3/110V/
Core II 2a-2n 5.04 5.06 5.01 10.05 10.08 10.09
√3
11KV/√3/110V/
Core III 3a-3n 5.04 5.07 5.02 10.02 10.09 10.05
√3

2.2 SECONDARY WINDING RESISTANCE TEST:

Phase reference
Core Ratio Terminal
R Y B
Core I 11KV/√3/110V/√3 1a-1n 93 mΩ 75 mΩ 93 mΩ
Core II 11KV/√3/110V/√3 2a-2n 454 mΩ 454 mΩ 454 mΩ
Core III 11KV/√3/110V/√3 3a-3n 467 mΩ 469 mΩ 468 mΩ

3.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
19
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF TRANSFORMER NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 100KVA, LT, TRANSFORMER-1 Comp. Code 001

1.0 NAME PLATE DETAILS :

Make VOLTAMP Vector Group Dyn11
Serial No. 62402/1 % Impedance 4.75%
Rating in KVA 100 Tap Changer OFFLINE
Voltage Ratio 11/0.433 KV No. Of Taps 5
Current Ratio 5.25/133.34 A MFG Date 2015
Type of Cooling AN

2.0 INSULATION RESISTANCE TEST AND PI TEST :

Megger Used : 5 KV
Range : > 1 TΩ
H.V to L.V In 15 seconds In 1 minute In 10 minutes
Applied Voltage 5KV 54.17 GΩ 147.71 GΩ 237 GΩ

L.V to Earth In 15 sec In 1 minute

Applied Voltage 1KV 12.44 GΩ 21.32 GΩ

H.V to Earth In 15 sec In 1 minute

Applied Voltage 5KV 17.31 GΩ 29.85 GΩ

3.0 VOLTAGE RATIO & TAP CONTINUITY TEST :

Voltage on HV Side Measured voltage on LV Side
Measured voltage on HV Side
Tap Tap continuity
RY(V) YB(V) BR(V) r-n(V) y-n(V) b-n(V)
Position
1 420 422 415 9.01 9.03 9.03 Found OK.
2 420 422 415 9.38 9.37 9.37 Found OK.
3 420 422 415 9.61 9.63 9.62 Found OK.
4 420 422 415 9.86 9.88 9.87 Found OK.
5 420 422 415 10.11 10.13 10.12 Found OK.

4.0 MAGNETIC BALANCE TEST : at tap -3

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
20
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

Supply Voltage (HV Side) Measured Voltage (LV side)

R-Y (V) Y-B (V) B-R (V) r-n (V) y-n (V) b-n (V)
417 329.2 90.1 9.45 7.51 2.019
219.7 414 196.6 4.97 9.47 4.47
73.1 342.9 417 1.67 7.78 9.47

5.0 MAGNETIZATION CURRENT TEST:

Measured Current HV Side
Tap
R(mA) Y(mA) B(mA)
1 2.7 1.7 1.5
3 2.6 1.3 2.0
5 3.3 1.7 1.9

6.0 VECTOR GROUP TEST :

Short 1U-2U and apply 415 V on HT side.
1U-1V 417 1V-1W 417 1W-1U 414
1U-2U 0.10 1V-2U 417 1W-2U 414
1U-2V 16.63 1V-2V 402 1W-2V 415
1U-2W 16.46 1V-2W 401 1W-2W 402
1U-2N 9.60 1V-2N 405 1W-2N 412

Condition:
1U-2V = 1U-2W 1U-2N + 1V-2N = 1U-1V 1W-2W < 1W-2V 1V-2V = 1V-2W

16.63 = 16.46 9.60 + 405 = 417 402 < 415 402 = 401

7.0 SHORT CIRCUIT TEST :

Supply Voltage (HV Side)

R-Y Volt. Y-B Volt. B-R Volt.

420 V 422 V 415 V

Measured Current HV Side

TAP LV Star Point Current
R Phase Current Y Phase Current B Phase Current

3 2.2 A 2.2 A 2.1 A 60.7 A

8.0 WINDING RESISTANCE TEST:

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
21
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

HV Side
Tap Position
R-Y Y-B B-R
1 23.61 Ω 23.70Ω 23.57Ω
2 23.05 Ω 23.16Ω 23.02Ω
3 22.50 Ω 22.59Ω 22.47Ω
4 21.95 Ω 22.01Ω 21.90Ω
5 21.38 Ω 21.44Ω 21.32Ω

LV Side
Tap Position
r-n y-n b-n
3 11.96 mΩ 12.14 mΩ 12.02 mΩ

9.0 CONFORMITY TESTS :

Sr. No. Description Remark
1 Visual External damage to any part of the transformer OK
2 Color of silica jell / oil level in bottom seal/Leakage if any OK
3 Proper Connections of body and neutral earthling OK
4 Buchholz relay test for alarm/trip contact float operations OK
5 Winding/oil temperature indicator alarm/trip contact operations OK
6 MOG float switch contact operation OK
7 Cooling System OK

10.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
22
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF TRANSFORMER NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 10/03/2023
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 100KVA, LT, TRANSFORMER-2 Comp. Code 001

1.0 NAME PLATE DETAILS :

Make VOLTAMP Vector Group Dyn11
Serial No. 62402/2 % Impedance 4.75%
Rating in KVA 100 Tap Changer OFFLINE
Voltage Ratio 11/0.433 KV No. Of Taps 5
Current Ratio 5.25/133.34 A MFG Date 2015
Type of Cooling AN

2.0 INSULATION RESISTANCE TEST AND PI TEST :

Megger Used : 5 KV
Range : > 1 TΩ
H.V to L.V In 15 seconds In 1 minute In 10 minutes
Applied Voltage 5KV 68.12 GΩ 172.8 GΩ 287.39 GΩ

L.V to Earth In 15 sec In 1 minute

Applied Voltage 1KV 232.9 GΩ 241 GΩ

H.V to Earth In 15 sec In 1 minute

Applied Voltage 5KV 6.98 GΩ 19.51 GΩ

3.0 VOLTAGE RATIO & TAP CONTINUITY TEST :

Applied voltage on HV Side Measured voltage on LV Side
Applied voltage on HV Side
Tap Tap continuity
RY(V) YB(V) BR(V) r-n(V) y-n(V) b-n(V)
Position
1 420 422 415 9.09 9.05 9.05 Found OK.
2 420 422 415 9.28 9.28 9.28 Found OK.
3 420 422 415 9.51 9.52 9.52 Found OK.
4 420 422 415 9.82 9.82 9.81 Found OK.
5 420 422 415 10.08 10.08 10.9 Found OK.

4.0 MAGNETIC BALANCE TEST : at tap -3

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
23
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

Supply Voltage (HV Side) Measured Voltage (LV side)

R-Y (V) Y-B (V) B-R (V) r-n (V) y-n (V) b-n (V)
417 314 103.6 9.51 7.17 2.38
217 417 202.3 4.92 9.53 4.59
102.7 316.4 419 2.36 7.19 9.52

5.0 MAGNETIZATION CURRENT TEST:

Measured Current HV Side
Tap
R(mA) Y(mA) B(mA)
1 4.9 4.5 4.6
3 4.6 4.2 4.3
5 4.7 4.7 4.7

6.0 VECTOR GROUP TEST :

Short 1U-2U and apply 415 V on HT side.
1U-1V 420 1V-1W 420 1W-1U 423
1U-2U 0.13 1V-2U 418 1W-2U 422
1U-2V 16.54 1V-2V 408 1W-2V 423
1U-2W 16.61 1V-2W 408 1W-2W 405
1U-2N 9.52 1V-2N 413 1W-2N 415

Condition:
1U-2V = 1U-2W 1U-2N + 1V-2N = 1U-1V 1W-2W < 1W-2V 1V-2V = 1V-2W

16.54 = 16.61 9.52 + 413 = 420 405 < 423 408 = 408

7.0 SHORT CIRCUIT TEST :

Supply Voltage (HV Side)

R-Y Volt. Y-B Volt. B-R Volt.

420 V 422 V 415 V

Measured Current HV Side

TAP LV Star Point Current
R Phase Current Y Phase Current B Phase Current

3 2.2 A 2.2 A 2.0 A 59.5 A

8.0 WINDING RESISTANCE TEST:

Tap Position HV Side

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
24
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

R-Y Y-B B-R

1 24.06 Ω 24.05 Ω 24.10 Ω
2 23.43 Ω 23.49 Ω 23.59 Ω
3 23.14 Ω 23.08 Ω 22.76 Ω
4 22.30 Ω 22.41 Ω 22.35 Ω
5 21.89 Ω 21.87 Ω 21.75 Ω

LV Side
Tap Position
r-n y-n b-n
3 12.40 mΩ 12.41 mΩ 12.32 mΩ

9.0 CONFORMITY TESTS :

Sr. No. Description Remark
1 Visual External damage to any part of the transformer OK
2 Color of silica jell / oil level in bottom seal/Leakage if any OK
3 Proper Connections of body and neutral earthling OK
4 Buchholz relay test for alarm/trip contact float operations OK
5 Winding/oil temperature indicator alarm/trip contact operations OK
6 MOG float switch contact operation OK
7 Cooling System OK

10.0 REMARKS : Tested and Found Healthy.

TEST CERTIFICATE OF LIGHTNING ARRESTER NS Engineers, Ahmedabad

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
25
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

OM INFRA LIMITED.
Client Tested On 12/03/23
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV LINE 1 Comp. Code 001
1.0 EQUIPMENT DETATILS: -
1.1 Make OBLUM ELECTRICAL INDUSTRIES
1.2 Sr. No. (R, Y, B) R –8353 Y – 8373 B –8346
1.3 Type ANALOG
1.4 Rating ZAO
1.5 LD class 3

2.0 GENERAL CHECK-UP: -

2.1 Check for physical damage if any OK.
2.2 Check enclosure for cleanliness and vermin proofing OK.
2.3 Check earth bus continuity OK.

3.0 COUNTER TESTS: -

Before Counter Reading After Counter Reading
R-Phase Y-Phase B-Phase R-Phase Y-Phase B-Phase
006511 001303 001307 006513 001304 001308

4.0 REMARKS : Tested and Found Healthy.

TEST CERTIFICATE OF LIGHTNING ARRESTER NS Engineers, Ahmedabad

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
26
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

OM INFRA LIMITED.
Client Tested On 12/03/23
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV LINE 2 Comp. Code 002

1.0 EQUIPMENT DETATILS: -

1.1 Make OBLUM ELECTRICAL INDUSTRIES
1.2 Sr. No. (R, Y, B) R –8345 Y – 8344 B – 8320
1.3 Type ANALOG
1.4 Rating ZAO
1.5 LD class 3

2.0 GENERAL CHECK-UP: -

2.1 Check for physical damage if any OK.
2.2 Check enclosure for cleanliness and vermin proofing OK.
2.3 Check earth bus continuity OK.

3.0 COUNTER TESTS: -

Before Counter Reading After Counter Reading
R-Phase Y-Phase B-Phase R-Phase Y-Phase B-Phase
002903 001395 001807 002904 001396 001808

4.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
27
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF GENERATOR NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 12/03/23
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV Synchronous Generator-1 Comp. Code 001

1.0 GENERATOR NAMEPLAT DETAILS :

GENERATOR 1 SR NO 1031663129

FEEDER NO Unit-1

SPECIFICATION

MAKE WEG FRAME GH-11 800

P.F. 0.8 RPM 750

KVA 4163 F.L. CURRENT 218.5

VOLTAGE 11 KV FREQUENCY : 50 Hz

STATOR CONNECTION

2.0 INSULATION RESISTANCE TEST : GENERATOR

Megger Used Make Sr. No. Scale
5KV Sonel CU1664 >5 TΩ
Values in G-ohms (1 mint ) R-YBE Y-RBE B-RYE
1.28 GΩ 2.47 GΩ 1.39 GΩ
PI TEST (10mint ) R-YBE Y-RBE B-RYE
5.65 GΩ 7.56 GΩ 5.98 GΩ

3.0 WINDING RESISTANCE/ INDUCTANCE

PHASE RY YB BR
WINDING RESISTANCE 135.2 mΩ 135.1 mΩ 135.2 mΩ

4.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
28
 NS ENGINEERS
69-A, Pushpraj Complex, Jashoda Cross Road,
Vatva Road, Ahmedabad-383 445, Gujarat, INDIA

TEST CERTIFICATE OF GENERATOR NS Engineers, Ahmedabad

OM INFRA LIMITED.
Client Tested On 12/03/23
SARDAR SAROVAR NARMADA NIGAM LTD.
Plant KBC SHPP-2, 11KV HT PANEL SWITCHGEAR ROOM Tested By MM/RP/UT
Location 11KV Synchronous Generator-2 Comp. Code 002

1.0 GENERATOR NAMEPLAT DETAILS :

GENERATOR 1 SR NO 1031663236

FEEDER NO Unit-1

SPECIFICATION

MAKE WEG FRAME GH-11 800

P.F. 0.8 RPM 750

KVA 4163 F.L. CURRENT 218.5

VOLTAGE 11 KV FREQUENCY : 50 Hz

STATOR CONNECTION

2.0 INSULATION RESISTANCE TEST : GENERATOR

Megger Used Make Sr. No. Scale
5KV Sonel CU1664 >5 TΩ
Values in G-ohms (1 mint ) R-YBE Y-RBE B-RYE
2.48 GΩ 2.86 GΩ 2.59 GΩ
PI TEST (10mint ) R-YBE Y-RBE B-RYE
6.95 GΩ 7.87 GΩ 6.99 GΩ

3.0 WINDING RESISTANCE/ INDUCTANCE

PHASE RY YB BR
WINDING RESISTANCE 134.9 mΩ 135.1 mΩ 135.2 mΩ

4.0 REMARKS : Tested and Found Healthy.

Witnessed/ Reviewed by NS Engineers OMIL SSNNL

Signature

Name
29