Precommissioning Test Format

ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF TRANSFORMER COMMISSIONING FORMATS DOC NO:

SUBSTATION:

Transformer BAY NO: DATE OF TESTING:

EQUIPMENT IDENTIFICATION NO:

Transformer Type:

2 Winding

ICT

Voltage level, kV

132/33 220/132

220/132/11

Current (HV side):

Current (LV side):

Current (Tertiary):

MVA RTING:

A.

Sl.No 1 2 3 4 5 6

7 8 9 10

Continuity Test of Bushing CTs Secondary winding resistance of bushing CT

11

Polarity Test of Bushing CTs Current Ratio test Magnetising curves performance

19 20

Frequency Response Analysis Measurement of Winding Resistance

Page 1 of 72

Performed (Yes/No)

17 18

16

400/220/33

Contact Resistance measurement TAN DELTA & CAPACITANCE Measurement of Bushings TAN DELTA & CAPACITANCE Measurement of WINDINGS Protection and alarm tests Stability test of Differential and REF protection

15

CHECK LIST OF ELECTRICAL TESTS CARRIED OUT FOR TRANSFORMER

Name of Tests Insulation resistance measurement Vector group test & polarity check Short circuit impedance test Magnetic balance test Floating neutral voltage measurement Magnetisation current test Voltage ratio test Insulation resistance measurements of bushing CT

12 13 14

Test Results OK/Not OK

Signature: Name: Designation: (Supplier Rep)

Signature: Name: Designation: Erection Agency:

Signature: Name: Designation: Site I/C, AEGCL

Signature Name: Designation: T & C, AEGCL

B. CHECKS AFTER RECEIPT OF TRANSFORMER AT SITE: a. N2 PRESSURE & DEW POINT RECORD

Description During Dispatch at factory After receipt at site DURING STORAGE AT SITE BEFORE COMM.

N2 Pressure

Dew Point

Ambient Temp

Remarks

NOTE: N2 pressure and dew point should be within permissible range as per graph provided by manufacturer. During storage at site, dew point has to be measured whenever any drop in N2 pressure is observed. During storage at site before commissioning, N2 pressure has to be measured daily and record to be maintained in a separate sheet. b. IMPACT RECORER ANALYSIS RECEIVED IN STATUS HEALTHY Yes CONDITION AT SITE Yes Analysis report Received from Manufacturer Before starting of erection

No

BRIEF ANALYSIS

No

Note: Impact Recorder should be detached from the Transformer/ Reactor preferably when the main unit has been placed on its foundation. c. CORE INSULATION CHECK INSULATION VALUE Between CC‐G Between CL‐G Between CC‐CL (Recommended value > 10 M Ohms)' Note: Shorting link between CC, CL & G to be removed and IR value to be taken between CC‐G, CL‐G & CC‐CL.

Page 2 of 72

C. CHECKS/ PRECAUTIONS DURING ERECTION i) Active part of transformer should minimum exposed to atmosphere ii) During exposure of active part of transformer to atmosphere: DRY AIR GENERATOR/ Yes DRY AIR CYLINDERS USED :

No

Remarks

iii) WHILE ENTERING IN TRANSFORMER TANK, CHECK AVAILABILITY OF PROPER OXYGEN TRANSFORMER KEPT Yes SEALED WITH N2 IN BETWEEN DIFFERENT ERECTION ACTIVITIES

No

Remarks

D. PRE‐COMMISSIONING CHECKS: Sl DESCRIPTION No 1. Transformer and its auxiliaries are free from visible defects on physical inspection 2. All fittings as per out line general arrangement drawing. 3. Check main tank has been provided with double earthing 4. Check neutral is grounded through separate connections. Ensure metallic requirements as per specification in earthing strips used 5. Check that Marshalling box, OLTC driving gear, Diverter, Radiator bank, Pump & Fan motor etc has been earthed 6. All nuts and bolts are tightened correctly as per specified torque (as per manufacturers recommendation) 7. Check tightness of terminal connectors 8. Check levelling of transformer and its accessories 9. Erection completion certificate along with list of outstanding activities reviewed 10. Any paint removed / scratched in transit has been touched up 11. Bushings are clean and free from physical damages 12. Oil level is correct on all bushings

STATUS Yes No

REMARKS RECORD DEFICIENCIES, IF ANY

Page 3 of 72

13. Check hermetically sealing is intact in all bushings 14. Check oil leakage through any joints / valves etc. 15. Check oil drain valves are properly closed and locked. 16. Check oil level in Main / OLTC conservator tank 17. Check oil level at conservator matches with oil temperature of transformer 18. Check gear box oil level in OLTC 19. Check OTI and WTI pockets and replenish the oil , if required 20. check all valves for their opening & closing sequence 21. Check the colour of breather silica gel ( blue when dry ) 22. Check availability of oil in the breather cup 23. Check all rollers are locked and tack welded with rails ( where ever applicable ) 24. Check bushing test tap is grounded 25. Check no debris , loose T & P and oil strains on and around the transformer 26. Check door seals of marshalling box is intact and all cable gland plates unused holes are sealed 27. Check that pressure relief valve is correctly mounted 28. Ensure unused secondary cores of bushing CT's, if any, has been shorted 29. Check star point has been formed properly and grounded at one end only as per scheme 30. Check that permanent and adequate lightning arrangements are ready 31. Check that labelling and identification is permanent and satisfactory 32. Check that buchholz relay is correctly mounted with arrow pointing towards conservator 33. Check cables are properly fixed and ensure cable entry at the bottom 34. Ensure all power and control cable terminals are tightened 35. Check all cables and ferrules are provided with number as per cable schedule (cross feruling to be Checked) 36. Check that all cables are correctly glanded

Page 4 of 72

37. Check external cabling from junction box to relay / control panel completed 38. Check that air has been released from the radiators and their headers / OLTC buchholz relay /Main tank / tank/ bushing turrets etc. 39. Check fire protection system & is adequate & ready 40. Check that CC‐CL& G are shorted 41. Check that all radiator bank valves on top and bottom headers are open 42. Change over operation of ac supply from Source‐i to Source‐ii checked 43. Check the flanges of bushing & OLTC for any crack after fixing 44. Check various interlocks provided with fire fighting as per the schematic ref. Drg no :__________ DESCRIPTION OF INTERLOCKS

CHECKED

E. MEASUREMENT OF EARTH RESISTANCE OF ELECTRODE LOCATION VALUE (Before connection to grid) VALUE (After connection to grid)

1

2

3

4

NOTE: Value of Earth Resistance< 1.0 OHM F. CALIBRATION OF OTI & WTI PERFORMED AS PER PROCEDURE:

Yes

No

G. DETAILS OF RELAYS/ CONTACTORS USED: SCHEMATIC DRAWING NO.: __________________ Circuit Reference

Make

Serial No.

Type

Number of NO & Number of AI, BI & NC contacts BO NO NC AI BI+BO

H. EVACUATING AND OIL FILLING:

a) Before filling oil, each drum has been physically checked for free moisture and appearance: Yes No

b) OIL FILTER MACHINE: Page 5 of 72

i). ii). iii). iv). v). vi).

Capacity : Make : Lubricating oil of vacuum pump changed or not : Filter Packs cleaned or not : Whole filter machine flushed with fresh oil or not Vacuum obtained without load (milli bar)

: :

c) VACUUM PUMP FOR EVACUATION OF TRANSFORMER: i). ii). iii). iv).

Lubricating Oil changed or not Vacuum obtained without load (milli bar) Diameter of vacuum hose (50 mm) Dry ice chamber employed or not

: : : :

d) OIL STORAGE TANK: i). ii). iii). iv). v).

Inside painted or not : Silica gel breather provided or not : Any opening left uncovered : Capacity of Storage tank (KL) : Cleanliness of inside of pipes/ hoses to the storage tank :

e) EXPOSURE DURING ERECTION: i). Exposure hours during First day, Number of Hours: a. N2 filled pressure (PSI or Bar) b. Number of Hours under N2 c. Ambient temperature d. Relative Humidity e. Weather (sunny/cloudy/stormy/rainy) ii). Exposure hours during Second day, Number of Hours: a. N2 filled pressure (PSI or Bar) b. Number of Hours under N2 c. Ambient temperature d. Relative Humidity e. Weather (sunny/cloudy/stormy/rainy) iii). Exposure hours during Third day, Number of Hours: a. N2 filled pressure (PSI or Bar) b. Number of Hours under N2 c. Ambient temperature d. Relative Humidity e. Weather (sunny/cloudy/stormy/rainy)

: : : : : : : : : :

:

: : : : :

:

:

f) N2 SEALING IN CASE OF DELAY IN OIL FILLING: a. No. of Cylinders used for displacing the air inside the tank: b. N2 admitted from bottom valve Page 6 of 72

a. Valve at diametrically opposite end at top kept open: b. No. of Cylinders used for building up 2 PSI (0.14 kg/cm2) Inspection Item 1. Tightness test a. Start evacuating on complete unit b. Stop evacuating at 3 mbar c. Pressure P1 in ‐‐‐‐kPa, 1 hour after stop evacuating d. Pressure P2 in ‐‐‐‐‐‐‐kPa, 0.5 hrs after reading P1 e. Leakage = (P2‐P1)X V= If >3.6, continue evacuating, ‘V’ is the volume of oil as per name plate. 2. VACUUM a. Pressure 0.13 kPa (1.3 mbar) reached b. Vacuum kept for Upto 145 kV, 12 Hour 145 kV & upto 220 kV, 24 Hours 3. OIL FILLING a. Oil filling is made b. Oil Conservator with Air Cell c. OLTC 4. STANDING TIME Upto 145 kV, 12 Hours 145 kV & upto 220 kV, 48 Hours

Date

Time

Checked

Remarks

G) RECORD OF DRYING OUT PROCESS: Drying out started on:

Date:

Time:

Ambient Temp:

(Hourly reading to be taken) Vacuum reading OTI OF Condensate Remarks & sign Vacuum In transformer TANK Collected total of supervising reading in Tank /Rate Engineer Filtration machine Record of filtration and Dry out shall be kept in a register and shall be made a part of the Pre‐ commissioning document.

Date

Time

H) INSULATION RESISTANCE MEASUREMENT: (USING 500 V MEGGER): Megger details: Validity of Calibration: Page 7 of 72

Ambient temperature: Sl No

Description

Status Yes A Control Wiring B Tap Cganger Motor Control wiring C Cooling System Fan Motor Pump Motor Control Wiring NOTE: IR values should be > 50 MΩ for cables

Remarks, if any No

I) INSULATION RESISTANCE MEASUREMENT: (USING 5000 V MEGGER): Megger details: Validity of Calibration: Ambient temperature: Main Winding Auto Transformer HV+IV to LV HV+IV to E LV to E 2 Winding Transformer HV to E LV to E HV to LV

Temperature of OIL:

IR Value (MΩ) 15 Sec 60 Sec

AI=60ss/15 s

PI=600s/60 s

Temp.

600 sec

J) VECTOR GROUP TEST & POLARITY CKECKING CONNECT NEUTRAL POINT WITH EARTH, JOIN 1RI AND 3 RI TERMINALS, ‐APPLY 415V, 3‐PHASE SUPPLY TO HV TERMINALS Terminal 1R1 – 1Y1 1Y1 – 1B1 1B1 – 1R1 3B1 – 1B1 3B1 – 1Y1 3R1 ‐ N 3Y1 – N 1R1 ‐ N 2R1 ‐ N 2 Y1 ‐ N 2 B1 ‐ N

Voltage Measured Page 8 of 72

Remarks

ENSURE 2R1 ‐N = 2Y1 ‐N = 2B1 ‐ N = CONSTANT AS 3R1 ‐N > 3B1 ‐ N > 3Y1 ‐ N, AND 3Y1 ‐ 1B1 > 3B1 – 1B1 VECTOR GROUP Ynaod1 IS CONFIRMED AND POLARITY VERIFIED K) MEASUREMENT OF WINDING RESISTANCE (IN OHM) Winding Resistance meter detail: Validity of calibration: Ambient Temperature:

OTI reading:

WTI reading:

i). HV Side Measurement Tap positi on 1 2 3 4 5 6 7 8 9b 10 11 12 13 14 15 16 17

Wdg. Resistance, HV‐N

Resistance at 750C

1R1‐2R1

R

1Y1‐2Y1

1B1‐2B1

Y

B

Factory Value at 750C R Y B

Remarks

Factory Test Report Ref. NO: ii). INTERMEDIATE VOLTAGE SIDE: Between Winding Resistance At Site 2R1 ‐ N 2Y1 – N 2B1 ‐ N

Site

Resistance at 750C Factory

iii). LOW VOLTAGE SIDE: Page 9 of 72

Remarks

Between Winding Resistance At Site 3R1 – N3B1 3Y1 – 3R1 3B1 – 3Y1

Site

Resistance at 750C Factory

Remarks

NOTE: LV WINDING RESISTANCE AT FACTORY MEASURED WITHOUT FORMATION OF DELTA. HOWEVER MEASUREMENTS CARRIED OUT AT SITE ARE AFTER FORMATION OF DELTA. HENCE A CORRECTION FACTOR OF 1.5 TIMES TO BE APPLIED IN SITE RESULTS. L) MAGNETIC BALANCE TEST: Apply single phase 230 V across one phase of HV winding terminal and neutral then measure voltage in other two HV terminals across neutral. Repeat the test for each of the three phases. Apply 1‐ph, 230V AC Voltage measured in Volts across (1) Between (2) Between (3) 2R1 ‐ N 2Y1 – N 2B1 ‐ N 2Y1 ‐ N 2R1 – N 2B1 ‐ N 2B1 ‐ N 2Y1 – N 2R1 ‐ N M) FLOATING NEUTRAL VOLTAGE MEASUREMENT

Remarks

Disconnect the transformer neutral from the ground Apply 3 phase 415 volts to the high voltage winding and make the measurement in the IV winding with respect to neutral and neutral point to ground. Tap Position

HV Winding

Normal ( ) Normal ( ) Normal ( )

1R ‐ N 1Y ‐ N 1B ‐ N

Voltage Applied

IV Winding 2R ‐ N 2Y ‐ N 2B ‐ N N ‐ Earth

Voltage Measured

Remarks, any

if

Apply 3 phase 415 volts to the intermediate voltage winding and make the measurement in the tertiary winding with respect to neutral and neutral point to ground. IV Winding

Voltage Applied

LV Winding

2R ‐ N 2Y – N 2B – N

3R ‐ N 3Y – N 3B ‐ N N ‐ Earth

Check: After the test, neutral reconnected to Ground: N) MAGNETISATION CURRENT TEST:

Page 10 of 72

Voltage Measured Yes / No

Remarks, if any

Testing Instrument detail: Testing Instrument Calibration valid or not: Ambient temperature at the time of test: Temperature of OIL: i). APPLY 1‐PHASE AC SUPPLY ON HV TERMINALS AND KEEP IV & LV OPEN Tap Position Voltage Current Factory test Remarks Applied (V) Measured (mA) value Lowest ( ) R ‐ N R ph Y ‐ N Y ph B ‐ N B ph Normal ( ) R ‐ N R ph Y ‐ N Y ph B ‐ N B ph Highest ( ) R ‐ N R ph Y ‐ N Y ph B ‐ N B ph ii). APPLY 1‐PHASE AC SUPPLY ON IV TERMINALS AND KEEP HV & LV OPEN Tap Position Voltage applied Current measured Remarks (Volts) in LV side (mAmps) Normal ( ) 2R ‐ N 2Y ‐ N 2B ‐ N P) VOLTAGE RATIO TEST: Testing Instrument (TRM) detail: Testing Instrument Calibration valid or not: Ambient temperature at the time of test: Temperature of OIL: i). Ratio HV / IV Tap Pos 1 2 3 4 5 6 7 8 9 10 11 12

Voltage applied 1R‐N 1Y‐N 1B‐N

Voltage measured 2R‐N 2Y‐N 2B‐N Page 11 of 72

Ratio R

Y

B

Factory Ratio R Y

B

13 14 15 16 17

B

Factory Ratio R Y

B

B

Factory Ratio R Y B

ii). RATIO : HV / LV Tap Voltage applied Position 1R‐N 1Y‐N 1B‐N Lowest Normal Highest iii). RATIO : IV / LV

Voltage measured 3R‐N 3Y‐N 3B‐N

Ratio R Y

Tap Voltage applied Voltage measured Ratio Position 2R‐N 2Y‐N 2B‐N 3R‐N 3Y‐N 3B‐N R Y Lowest Q) OIL CHARACTERISTICS: Date:

Time:

Ambient Temp:

OTI reading:

WTI reading:

Sample to be collected before Charging & following value to be achieved: BDV: Min 70 kV Moisture in PPM: Min 10 Tan delta (900C): Max 0.1 Resistivity: Min 6 x 1012 Ohm‐cm Interfacial Tension at 270C: Min 0.035 N/m OIL Sample

BDV (kV)

Moisture (PPM)

Tan delta

Resistivity (Ohm‐cm)

Main Tank Top Bottom OLTC

R) DISSOLVE GAS ANALYSIS DISOLVE

OIL SAMPLE SCHEDULE Page 12 of 72

Inter facial tension (N/m)

Remarks

GASES

Before Charging

Total Gas% H2 CH4 C2H4 C2H6 C2H2 CO CO2 O2 N2

24 Hrs After Charging

15 Days After Charging

7 Days After Charging

01 Month After Charging

03 Month After Charging

S) Test on OLTC: Sl No 1 2 3 4 5 6 7 8 9 10 11 12

Description

Status OK Not OK Visual inspection of equipment Manual operation on all taps ( local ) with confirmation of the no. of revolutions and Locking at extreme taps Over load device of driving motor Local operation (Electrical) Remote operation (Electrical) Tap position indicator Check operation with Master Follower scheme ( parallel operation ) Out of step relay Step by Step Contactor Limit Switch Winding resistance at all taps Continuity test of winding during one Complete cycle of operation

Remarks

T) OPERATIONAL TEST OF OTHER EQUIPMENTS i). CHECKING OF COOLING EQUIPMENTS a) Rotation Direction of Pumps: OK b) Rotation Direction of Fans: OK ii). PROTECTION CHECKS Eqpt. Setting Value Fan No 1 2 3 4 5 6

Not Ok Not Ok Pickup Value

Page 13 of 72

Single Phasing Prevention check

7 8 9 10 11 12 Pump No 1 2 3 4

U) INSULATION RESISTANCE MEASUREMENT OF BUSHING CT’s: (USING 500V MEGGER) Between Earth – Core I Earth – Core II Earth – Core III Earth‐ Core IV Core I – Core II Core I – Core III Core I – Core IV Core II – Core III Core II – Core IV Core III – Core IV

HV R‐ph

Y‐ph

B‐ph

IV R‐ph

Neutral Y‐ph

B‐ph

B‐ph

IV R‐ph

Y‐ph

B‐ph

R‐ph

LV Y‐ph

B‐ph

V) CONTINUITY TEST OF BUSHING CT's Core Core I Core II Core III Core IV

Between Terminal 1S1‐1S2 2S1‐2S2 3S1‐3S2 4S1‐4S2

HV R‐ph

Y‐ph

Neutral

R‐ph

LV Y‐ph

W) SECONDARY WINDING RESISTANCE OF BUSHING CT's (IN OHM) i). HV SIDE Core CORE‐I CORE‐II CORE‐III CORE‐IV


R‐Phase (Ω) Factory Site

Y‐Phase(Ω) Factory

Page 14 of 72

Site

B‐Phase(Ω) Factory

Site

B‐ph

ii). IV SIDE Core Between Terminal CORE‐I 1S1‐1S2 CORE‐II 2S1‐2S2 CORE‐III 3S1‐3S2 CORE‐IV 4S1‐4S2 iii). LV SIDE



Site


Site

Core CORE‐I CORE‐II CORE‐III CORE‐IV



Site


Site


iv). NEUTRAL SIDE Core CORE‐I

Between Terminal 1S1‐1S2

NEUTRAL (Ω) Factory Site

X) POLARITY TEST OF BUSHING CT's : (With 1.5 V DC Supply) i). POLARITY OF HV & IV BCT CORE

Between

R‐PH CORE‐I 1S1(+ve) 1S2(‐ve) CORE‐II 2S1(+ve) 2S2(‐ve) CORE‐III 3S1(+ve) 3S2(‐ve) CORE‐IV 4S1(+ve) 4S2(‐ve) ii). POLARITY OF LV & Neutral BCT CORE

Between

CORE‐I CORE‐II CORE‐III CORE‐IV

1S1(+ve) 2S1(+ve) 3S1(+ve) 4S1(+ve)

1S2(‐ve) 2S2(‐ve) 3S2(‐ve) 4S2(‐ve)

R‐PH

HV Y‐PH

LV Y‐PH

B‐PH

Neutral B‐PH

Y) CURRENT RATIO TEST: Measure current on secondary terminals i). R – PHASE: HV SIDE

Page 15 of 72

R‐PH

IV Y‐PH

B‐PH

CORE S1 – S2 CORE‐I (1S1‐1S2) CORE‐II (2S1‐2S2) CORE‐III (3S1‐3S2) CORE‐IV (4S1‐4S2)

Primary % 20% 40% 80% 20% 40% 80% 20% 40% 80% 20% 40% 80%

Current Actual

Secondary Current

Theoretical Ratio

Actual Ratio

% Error

ii). Y – PHASE: HV SIDE CORE S1 – S2 CORE‐I (1S1‐1S2) CORE‐II (2S1‐2S2) CORE‐III (3S1‐3S2) CORE‐IV (4S1‐4S2)

Primary % 20% 40% 80% 20% 40% 80% 20% 40% 80% 20% 40% 80%

Current Actual

Secondary Current

Theoretical Ratio

Actual Ratio

% Error

iii). B – PHASE: HV SIDE CORE S1 – S2 CORE‐I (1S1‐1S2) CORE‐II (2S1‐2S2) CORE‐III (3S1‐3S2) CORE‐IV (4S1‐4S2)

Primary % 20% 40% 80% 20% 40% 80% 20% 40% 80% 20% 40% 80%

Current Actual

Secondary Current Page 16 of 72

Theoretical Ratio

Actual Ratio

% Error

iv). R – PHASE: IV SIDE CORE S1 – S2 CORE‐I (1S1‐1S2) CORE‐II (2S1‐2S2) CORE‐III (3S1‐3S2) CORE‐IV (4S1‐4S2)

Primary % 20% 40% 80% 20% 40% 80% 20% 40% 80% 20% 40% 80%

Current Actual

Secondary Current

Theoretical Ratio

Actual Ratio

% Error

v). Y – PHASE: IV SIDE CORE S1 – S2 CORE‐I (1S1‐1S2) CORE‐II (2S1‐2S2) CORE‐III (3S1‐3S2) CORE‐IV (4S1‐4S2)

Primary % 20% 40% 80% 20% 40% 80% 20% 40% 80% 20% 40% 80%

Current Actual

Secondary Current

Theoretical Ratio

Actual Ratio

% Error

vi). B – PHASE: IV SIDE CORE S1 – S2 CORE‐I (1S1‐1S2) CORE‐II (2S1‐2S2) CORE‐III (3S1‐3S2)

Primary % 20% 40% 80% 20% 40% 80% 20% 40% 80%

Current Actual

Secondary Current Page 17 of 72

Theoretical Ratio

Actual Ratio

% Error

CORE‐IV (4S1‐4S2)

20% 40% 80% Z) MAGNETISING CURVES PERFORMANCE:

(NOT TO BE DONE FOR METERING CORE) KNEE POINT VOLTAGE (KVP) = i). R– PHASE: HV SIDE VOLTAGE To be applied Actual Value 0.25 x KVP 0.50 x KVP 0.75 x KVP 1.00 x KVP 1.10 x KVP ii). Y– PHASE: HV SIDE VOLTAGE To be applied Actual Value 0.25 x KVP 0.50 x KVP 0.75 x KVP 1.00 x KVP 1.10 x KVP

CURRENT MEASUREMENT (mA) CORE‐I CORE‐II CORE‐III 1S1‐1S2 2S1‐2S2 3S1‐3S2

CORE‐IV 4S1‐4S2


CORE‐IV 4S1‐4S2

iii). B– PHASE: HV SIDE VOLTAGE To be applied Actual Value 0.25 x KVP 0.50 x KVP 0.75 x KVP 1.00 x KVP 1.10 x KVP


CORE‐IV 4S1‐4S2

iv). R– PHASE: IV SIDE VOLTAGE To be applied Actual Value 0.25 x KVP 0.50 x KVP 0.75 x KVP 1.00 x KVP 1.10 x KVP


CORE‐IV 4S1‐4S2

Page 18 of 72

v). Y– PHASE: IV SIDE VOLTAGE To be applied Actual Value 0.25 x KVP 0.50 x KVP 0.75 x KVP 1.00 x KVP 1.10 x KVP


CORE‐IV 4S1‐4S2

vi). B– PHASE: IV SIDE VOLTAGE To be applied Actual Value 0.25 x KVP 0.50 x KVP 0.75 x KVP 1.00 x KVP 1.10 x KVP


CORE‐IV 4S1‐4S2

AA) CONTACT RESISTANCE MEASUREMENT: At 100 AMPS NOTE: THE VALUE OF CONTACT RESISTANCE SHOULD NOT BE MORE THAN 10 μΩ PER JOINT / CONNECTOR CONTACT RESISTANCE Across HV Bushing Terminal Bushing Across IV Bushing Terminal Bushing Across LV Bushing Terminal Bushing Across Neutral Bushing Terminal Bushing Across Surge Arrestor Connection

R‐PH (μΩ)

Y‐PH (μΩ)

B‐PH (μΩ)

AB) BUSHING DETAILS : Drawing No. __________________________________ Details Make Type Sl. No

Rph

HV Side Yph

Bph

Rph

IV Side Yph

Bph

Rph

AC) TAN DELTA AND CAPACITANCE MEASUREMENT OF BUSHING Testing Instrument detail: Page 19 of 72

LV Side Yph

Neutral Bph

Testing Instrument Calibration valid or not: Ambient temperature at the time of test: Temperature of OIL: i). HV SIDE VOLTAGE

1 kV 2 kV 10 kV VOLTAGE

1 kV 2 kV 10 kV

R‐PHASE SITE

CAPACITANCE (Measured Value) Y‐PHASE B‐PHASE FACTORY SITE FACTORY SITE FACTORY

R‐PHASE SITE

TAN DELTA (Measured Value) Y‐PHASE B‐PHASE FACTORY SITE FACTORY SITE FACTORY

R‐PHASE SITE

CAPACITANCE (Measured Value) Y‐PHASE B‐PHASE FACTORY SITE FACTORY SITE FACTORY

R‐PHASE SITE

TAN DELTA (Measured Value) Y‐PHASE B‐PHASE FACTORY SITE FACTORY SITE FACTORY

Remarks

Remarks

ii). IV SIDE VOLTAGE

1 kV 2 kV 10 kV

Remarks

VOLTAGE

1 kV 2 kV 10 kV

Remarks

AD) TAN DELTA AND CAPACITANCE MEASUREMENT OF WINDINGS Testing Instrument detail:____________________________________________________ Testing Instrument Calibration valid or not: ___________________ Ambient temperature at the time of test: _______________ Temperature of OIL: __________________ Voltage 2 kV 10 kV

Winding Test Combination Mode HV‐IV/LV UST

CAPACITANCE Site Factory Page 20 of 72

TAN DELTA Site Factory

Remarks

2 kV 10 kV 2 kV 10 kV 2 kV 10 kV 2 kV 10 kV

HV‐IV/LV+G

GST

HV‐IV/LV with Guard LV/HV‐IV+G

GSTg

LV/HV‐IV with Guard

GST GSTG

AD) SHORT CIRCUIT IMPEDANCE TEST Testing Instrument detail:____________________________________________________ Testing Instrument Calibration valid or not: ___________________ Ambient temperature at the time of test: _______________ Temperature of OIL: __________________ i). HV TO IV Tap No.

1U1 (R) (IV OF R‐φ AND N SHORTED, LV OPEN) Voltage (V) Current (A)

1V1 (Y) (IV OF Y‐φ AND N SHORTED, LV OPEN) Voltage (V) Current (A)

LOWEST NORMAL HIGHEST ii). IV TO LV (NORMAL TAP) SUPPLY SHORT ALL 3 LV BUSHINGS, HV OPEN 2U1‐N ____________A 2V1‐N 2W1‐N iii). HV TO LV (NORMAL TAP) SUPPLY SHORT ALL 3 LV BUSHINGS, HV OPEN 1U1‐N ____________A 1V1‐N 1W1‐N AT LOWEST TAP SUPPLY SHORT ALL 3 LV BUSHINGS, HV OPEN 1U1‐N ____________A 1V1‐N 1W1‐N AT HIGHEST TAP

SHORT ALL 3 LV BUSHINGS, HV OPEN _____________A

SHORT ALL 3 LV BUSHINGS, HV OPEN ____________A





Page 21 of 72

1W1 (B) (IV OF B‐φ AND N SHORTED, LV OPEN) Voltage(V) Current(A)

SUPPLY


1U1‐N 1V1‐N 1W1‐N AE) PROTECTION AND ALARMS SL Device No 1. Excessive Winding Temperature 2. Excessive Oil Temperature 3. Oil Flow Failure 4. Pressure Relief Valve 5. Main Tank Buchholz relay 6. OLTC Buchholz relay 7. Fan Failure 8. Low Oil Level Gauge (MOLG) 9. Differential relay 10. Overload Relay 11. REF 12. Over Current 13. Inter trip, if any 14. Trip Free Check 15. Backup Over Current 16. Over Flux AF) DETALS OF PROTECTION SETTINGS: i). DIFFERENTIAL PROTECTION:



SET FOR ALARM TRIP NA NA NA NA NA NA NA NA NA NA NA NA

PROVED ALARM TRIP NA NA NA NA NA NA NA NA NA NA NA NA

a. DIFFERENTIAL CHARACTERISTICS SETTINGS b. Function

Enabled

c. Pickup

Enabled/Disabled

d. Slope 1

Enabled/Disabled

e. Break 1

Enabled/Disabled

f.

Enabled/Disabled

Break 2

g. Slope 2

Enabled/Disabled

h. Inrush Inhibit Mode

Enabled/Disabled

i.

Inrush Inhibit Level

Enabled/Disabled

j.

Over excitation Inhibit Function

Enabled/Disabled

k. Over excitation Inhibit Level

Enabled/Disabled

ii). REF PROTECTION REF SETTINGS: a. Function

Enabled

Page 22 of 72

b. Source

c. Pickup

d. Slope

e. Pickup Delay

f.

Reset Delay

iii). OVER FLUXING PROTECTION: OVER FLUXING SETTINGS: a. Function

Enabled

b. Source

c. Pickup

d. Curves

e. TD Multiplier

f.

T Reset

iv). BACK UP PROTECTION: LV Side: a. Over current Settings:

PS

__________

TMS

HS

______

_________

TMS

______

_________

TMS

______

_________

TMS

______

b. Earth Fault Settings:

__________

PS

HS

HV SIDE: c. Over current Settings:

PS

__________

HS

d. Earth Fault Settings:

__________

PS

HS

_________

OK/ Not OK AG) STABILITY TEST OF DIFFERENTIAL & REF PROTECTION: NOTE : Prove the tripping of associated breakers by actual operation of the various devices and relays as per the schemes. AH) FREQUENCY RESPONSE ANALYSIS (FRA) Page 23 of 72

i). Carried out after completion of all commissioning activities:

Yes / No

ii). Interpretation of test results carried out:

Yes / No

iii). Test results matching with the factory results:

Yes / No

iv). Factory & site fra test report available at site:

Yes / No

AI) all electrical test results compared with Factory test results and found to be in order: Yes / No CHECKS AFTER CHARGING OF TRANSFORMER AK) RECORD THE FOLLOWING AFTER CHARGING: i). Any abnormal sound emanating from the transformer: Yes / No / Remarks ii). No load current at relay terminal: R – Phase: ______________A Y – Phase: __________________A B – Phase: ___________________A CTR: ______________________ iii). Temperature at the time of Charging: OTI

:_____________0C

WTI

:_____________0C

Ambient temperature: ______________0C iv). MAXIMUM TEMPERATURE AFTER 24 HOURS: ___________0C v). OLTC electrical operation checked in idle charged condition from min position to max position and back to normal position: YES / NO vi). Thermovision scanning done at least after 24 hours of loading and repeated after one week: YES/ NO. AL) FINAL DOCUMENTATION REVIEW i). FACTORY TEST RESULTS ARE AVAILABLE :

YES / NO

YES / NO

ii). FINAL DOCUMENT OF PRE‐COMMISSIONING CHECKS REVIEWED AND APPROVED:

Page 24 of 72

iii). DOCUMENTS REGARDING SPARES, EQUIPMENT, O & M MANNUALS ETC AVAILABLE AT SITE FOR O & M PURPOSE: iv). AFTER MODIFICATION, IF ANY, "AS BUILT DRAWINGS" ARE AVAILABLE AT SITE:

YES / NO

YES / NO




Page 25 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF ISOLATOR AND GROUND SWITCH COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NO:

DATE OF TESTING:

EQUIPMENT SERIAL NO : R‐Phase___________ Y‐PHASE____________B‐PHASE______________ Type:

MAKE:

Voltage level, kV

33

132

220

400

Current Carrying Capacity: ___________A Type of Operating Mechanism: Control Voltage:______________Volt DC 1)

DETAILS: SL

DESCRIPTION

STATUS

REMARKS,

No

ANY YES

1.

Equipment is free from dirt/dust Foreign materials

NO

etc. 2.

Equipment is free from all visible defects on physical inspection

3.

Support structures, marshalling box Has been provided with two earthing Pads / points

4.

All nuts and bolts are tightened correctly as per specified torque

5.

Equipment erection is complete in all respect as per instruction manual (attach remaining activities, if any)

6.

Permanent isolator levelling and identification is done

7.

Levelling and alignment of structure and base frame is checked

Page 26 of 72

IF

8.

Control box / marshalling kiosk is free from any

12. Cable termination and tightness checked and unused

14. All the cable identification tags provided and all

16. Alignment of isolator already made and locking bolt

18. Greasing has been made on the main contacts

physical defects 9.

Tightness of nuts bolts of terminal connectors are checked

10. Auxiliary contacts and relays have been cleaned and free from rust / damage 11. Corona rings are provided and properly fixed

holes sealed 13. External cabling is completed in all respect

cores are provided with identification ferrules at M.B. 15. All moving parts are lubricated

provided, if any 17. Freeness of manual operation is OK

according to the manufacturers instruction 19. Functional checking of auxiliary Contacts for indications and interlocks 20. Erection completion certificate along with list of outstanding activities reviewed 21. All spare wires to be kept with ferrules but not terminated at the terminal blocks 22. Earth switch connected to earth through braided wires 23. Interlocks checked as per approved scheme with all combinations 24. Check that earth switch blade alignment In condition is at sufficient distant from Isolator 25. Check that operation and positioning of the limit switch & the auxiliary contacts assembly are ok 26. Check that all three phase isolators are Closing & Page 27 of 72

Opening at a time 27. Check all 3 earth switches close at the same time

28. Provision of bimetallic strips ensured wherever

applicable 2)

MOTOR DETAILS: a) Make: b) Sl. No: c) Type: d) HP/KW: e) Volt: f)

Ampere:

g) Year of Manufacture: h) Overload Settings: i)

Insulation Resistance of Motor Winding (Winding to Earth): (By 500 V Megger):_____________MΩ.

3)

ISOLATOR OPERATIONAL CHECK: a) Operate the Isolator and record the motor current: a. Open: _________________A b. Close: _________________A b) OPERATION OF ISOLATOR FROM LOCAL / REMOTE: Isolator Operation

OK / NOT OK

CONTROL PANEL LOCAL

REMOTE

Open

Close

c) MEASUREMENT OF OPERATING TIME OPERATION

PHASE R‐Phase

Y‐Phase

B‐Phase

CLOSING (Sec)

OPENING (Sec)

d) AUXILLARY CONTACTS CHECKING Page 28 of 72

ISOLATOR

AUXILIARY

OPERATION RELAY

CLOSE

OPEN

OPERATION TIME R‐PHASE

Y‐PHASE

B‐PHASE

TYPE

NO

NC

NO

NC

NO

NC

4)

INSULATION RESISTANCE TEST ( USING 5000 VOLT MEGGER ): ISOLATOR OPEN CONDITION BETWEEN

PHASE R‐Phase

Y‐Phase

B‐Phase

Male side to Ground

Female side to Ground

Male side to Female side

5)

CONTACT RESISTANCE MEASUREMENT: (TO BE MEASURED AFTER 50 OPERATIONS) a) ISOLATOR CLOSE CONDITION (CONTACT RESISTANCE SHOULD BE LESS THAN 10 μΩ/ CONNECTOR) ACROSS

PHASE R‐Phase (μΩ)

Y‐Phase(μΩ)

B‐Phase(μΩ)

CONNECTOR (MALE SIDE)

CONNECTOR (FEMALE SIDE)

MAIN CONTACT (MALE & FEMALE)

b) ISOLATOR OPEN CONDITION & GROUND SWITCH CLOSE (CONTACT RESISTANCE SHOULD BE LESS THAN 150 μΩ / BREAK) Page 29 of 72

ACROSS

PHASE

MAIN CONTACT (MALE & FEMALE)

R‐Phase (μΩ)

Y‐Phase(μΩ)

B‐Phase(μΩ)

(GROUND SWITCH) c) Resistance of Operating Coil ____________________ d) Resistance of Interlocking Coil ____________________ 6)

FINAL DOCUMENTATION REVIEW: a)

FINAL DOCUMENT OF PRE‐COMMISSIONING CHECKS REVIEWED AND APPROVED:

b)

c)

YES / NO

MANNUALS ETC AVAILABLE AT SITE FOR O & M PURPOSE:

YES / NO

DOCUMENTS REGARDING SPARES, EQUIPMENT, O & M

AFTER MODIFICATION, IF ANY, "AS BUILT DRAWINGS" ARE AVAILABLE AT SITE:



YES / NO


Page 30 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF WAVE TRAP COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NO:

DATE OF TESTING:

EQUIPMENT SERIAL NO: R‐Phase___________ Y‐PHASE____________B‐PHASE______________ Type:

MAKE:

Voltage level, kV

132

220

BAND WIDTH:

400

Current rating: ___________A mH Rating:

1. DETAILS : CHECKLIST / TESTING SL

DESCRIPTION

STATUS

REMARKS,

No

ANY YES

1.

Equipment is free from dirt/dust Foreign materials

NO

etc. 2.

Equipment is free from all visible defects on physical inspection

3.

Support structures, has been provided with two earthing Pads / points

4.

All nuts and bolts are tightened correctly as per specified torque

5.

Permanent isolator levelling and identification is done

6.

Levelling and alignment of structure and base frame is checked

7.

All insulators & line matching unit are free from any physical defects

8.

Tightness of nuts / bolts of terminal connectors are checked Page 31 of 72

IF

9.

Erection completion certificate along with list of

outstanding activities reviewed 10. Check that the tuning unit and Arrestor are properly tightened And free from any damage 2. INSULATION RESISTANCE MEASUREMENT: SL

BETWEEN

MEGGER

PHASE

NO

Upper Terminal 5000 V

Permissive

R‐PHASE

Y‐PHASE

B‐PHASE

Value

1000 MΩ

1 MΩ

& Earth

LA of the Wave 500 V Trap

3. CONTACT RESISTANCE MEASUREMENT: THE VALUE SHOULD NOT MORE THAN 5 μΩ PER CONNECTOR / JOINT SL

PHASE

No

ACROSS

R‐Phase (μΩ)

Y‐Phase (μΩ)

B‐Phase (μΩ)

1

Upper Terminal

2

Bottom Terminal

4. FINAL DOCUMENTATION REVIEW : a)

b)

c)

Final document of pre‐commissioning checks Reviewed and Approved: Documents regarding spares, equipment, O& M Manuals etc. available at site for o & m purpose: After modification, if any, "as built drawings" are available at site:

YES / NO

YES / NO

YES / NO




Page 32 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF SF6 CIRCUIT BREAKER COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NAME / NO:

DATE OF ERECTION:

DATE OF ENERZIZATION:

EQUIPMENT SERIAL NO: R‐Phase___________ Y‐PHASE____________B‐PHASE______________ SERIAL NO (FOR GO TYPE): Type:

MAKE:

Voltage level, kV

33

132

220

RATED BREAKING CAPACITY:

Current rating: ___________A

400

CONTROL VOLTAGE: DETAILS : CHECKLIST / TESTING SL No

1.

2.

3.

4.

5.

6.

7.

8.

DESCRIPTION

Equipment is free from dirt/dust Foreign materials etc. Equipment is free from all visible defects on physical inspection Support structures, has been provided with two earthing Pads / points All nuts and bolts are tightened correctly as per specified torque Equipment erection is complete in all respect & erection completion Certificate along with list of Outstanding activities reviewed. (ATTACH REMAINING ACTIVITIES,IF ANY) Permanent pole levelling and Identification is done Levelling and alignment of structure and base frame is checked Control box / marshalling kiosk is free from any

Page 33 of 72

STATUS YES

NO

REMARKS,RECORD DEFICIENCIES, IF ANY

physical defects 9.

Tightness of nuts bolts of terminal connectors are checked i) Auxiliary contacts and relays have been cleaned and free from rust /damage ii) All spare wires to be kept with ferrules but not terminated at the terminal blocks iii) Check all the valves in the SF6 pipe line are tightened, dilo coupling are tightened. Slow and power closing operation and opening done. (wherever applicable) Operating System

10.

11. 12.

a)

Closing

i). Hydraulic ii). Spring iii). Pneumatic b) Opening

12.1.

12.1.1.

i). Hydraulic ii). Spring iii). Pneumatic HYDRAULIC SYSTEM

ACCUMULATOR

a)

Make

b)

c)

Serial No: R‐ph: Y‐Ph B‐Ph Type

d)

Year of Manufacture

12.1.2. PUMP DETAILS

a) b) c) d) e) f) g)

Make Type Sl. No Volt Ampere HP/KW Year of Manufacture

12.1.3.

DETAILS OF RELAYS/CONTACTORS USED: SCHEMATIC DRAWING NO :____________

CIRCUIT REFERENCE

MAKE

Serial No.

TYPE

NO + NC

Oil Pressure monitor

Closing lockout

Page 34 of 72

Auto reclosing lockout

General lockout

Anti‐Pumping contactor

Pole discrepancy timer

Auxiliary

Power contactor

Others

12.1.4.

OPERATION CHECK: Date of filling hydraulic oil:

____________________

Type of hydraulic oil:

_____________________

Venting of Hydraulic System is done: a)

Pump

___________________

b)

Pilot Valve

___________________

c)

Accumulator

___________________

d)

Hydraulic Mechanism

___________________

FACTORY TEST

PRE‐FILLING PRESSURE OF N2 IN ACCUMULATOR ( BAR at Deg.C)

SITE TEST

_______at C

______at 0C

_________

MIN

________

_________

BAR

________

0

Pump running time for charging Hydraulic system from initial pressure to working pressure CHECKING SAFETY VALVE (OPEN/CLOSE) HYDRAULIC PRESSURE DROP FOR 1 HR BREAKER ON POSITION

_________

BAR

_______

_________

BAR

_______

PUMP ON / OFF BAR

_________

BAR

_______

PUMP RUNNING TIME

_________

SEC

_______

BREAKER OFF POSITION OIL PRESSURE MONITOR

AUTO RECLOSING LOCKOUT (OIL) Page 35 of 72

FACTORY TEST PRESSURE CONTACT __________MAKE/BREAK _________

SITE TEST

BAR

_______

BAR

_______

BAR

_______

CLOSING LOCKOUT (OIL) PRESSURE CONTACT __________MAKE/BREAK _________ GENERAL LOCKOUT (OIL) PRESSURE CONTACT __________MAKE/BREAK _________ CHECKING ANTI PUMPING CONTACTOR PRESSURE CONTACT __________MAKE/BREAK

OK / NOT OK

OK / NOT OK

CHECKING LOSS OF NITROGEN PRESSURE CONTACT __________MAKE/BREAK

12.1.5. OIL PRESSURE DROP DURING OPERATIONS AND PUMP RUNNING TIME IN SECONDS Sl

Description

Factory Test

Site Test

Value

Value

Pressure before operation, BAR

Pressure after Closing operation, BAR

Pump running time, Sec


Pressure after Opening operation, BAR



Pressure after Close/Open operation, BAR



Pressure after Open –Close‐Open operation, BAR


No 1

2

3

4

12.2.

SPRING OPERATING SYSTEM

12.2.1. MOTOR DETAILS: Make:

Type:

Serial No:

Volt:

Ampere:

HP/KW:

Page 36 of 72

Thermal Overload Setting: DC current taken by Motor for charging the Spring _______________Amp 12.2.2. DETAILS OF RELAYS/CONTACTORS USED: SCHEMATIC DRAWING NO :____________ CIRCUIT REFERENCE

MAKE

Serial No.

TYPE

NO + NC

Oil Pressure monitor

Closing lockout

Auto reclosing lockout

General lockout

Anti‐Pumping contactor

Pole discrepancy timer

Auxiliary

Power contactor

Others

12.2.3. SPRING OPERATING TIME: TIME TAKEN BY THE SPRING TO CHARGE FULLY AFTER CLOSING OF BREAKER DETAILS

Charging time

R – PHASE

Y‐PHASE

Factory Site

Factory

Site

Factory

Site

B‐PHASE

13. SF6 DENSITY MONITOR DETAILS

Quantity of SF6 Gas Filled

Make

ACTUAL

Model

R‐Ph

Y‐Ph

B‐Ph

R‐Ph

Y‐Ph

B‐Ph

Serial No

R‐ph:

AS PER SPEC

Remark

Y‐ph: B‐Ph: 13.1.

SF6 DENSITY MONITOR SETTINGS BLOCKING

DE‐BLOCKING

SF6 GAS FILLED AT

Factory

Site

Factory

Site

__________BAR

Refill Alarm

AT _________0C ON

Operation Block

____/_____/_____

PHASE DETAILS

R‐PH

Page 37 of 72

Y‐PH

B‐PH

Refill Alarm

Operation Block

Refill Alarm

Operation Block

13.2.

MEASUREMENT OF DEW POINT OF SF6 GAS : SL NO

Description

Measured Value

Minimum value of Dew Point as

per SF6 Gas supplier/Manufacturer

of CB

NOTE: Dew point measurement of SF6 gas needs to be done pole wise in close loop method without any wastage of sf6 gas. 13.3.

LEAKAGE CHECK: Sl No

Description

PHASE R‐Phase

Y‐Phase

B‐Phase

Initial filling of SF6 Gas at _____0C (AS per Temp. correction chart)

_____BAR

_____BAR

_____BAR

B

Drop in SF6 Gas Pressure in 24 Hrs

_____BAR

_____BAR

_____BAR

C

Filling pressure at ________0C (After all testing) Additional leakage test by covering Individual joint with Polythene

_____BAR

_____BAR

_____BAR

Yes / No

Yes / No

Yes / No

A

D

14. COIL RESISTANCE MEASUREMENT: SL NO

PHASE

COIL

A

R‐Phase

B

Y ‐ Phase

C

B‐Phase

TRIP COIL ‐ I TRIP COIL ‐ II CLOSE COIL TRIP COIL ‐ I TRIP COIL ‐ II CLOSE COIL TRIP COIL ‐ I TRIP COIL ‐ II CLOSE COIL

MEASURED VALUE (Ω)

15. CIRCUITARY / OPEARTIONAL CHECKS:

Page 38 of 72

SERIES RESISTOR (Ω)

TOTAL (Ω)

SL NO

CIRCUIT REFERENCE

A B C D

Tripping through TC‐I Tripping through TC‐II Closing circuit ANTI PUMPING OPERATION (Close Open operation) POLE Discrepancy feature Breaker Position Indication Heater in Switch Cubicle Heater in Control Cubicle Illumination in Switch Cubicle Illumination in Control Cubicle

E F G H I J

CIRCUITRY CHECK LOCAL REMOTE

OPERATIONAL CHECK LOCAL REMOTE

NOTE : In case wiring for remote operation is not ready, please indicate terminal number along with wire ferrule number in switch cubicle where remote cables shall be terminated. Remote operation can be checked from these terminals. 16. OPERATING TIME ( IN MILLI‐SECONDS ): PHASE R‐PH Main Contact R‐PH PIR AUXILIARY Contact R‐PH Main Contact R‐PH PIR AUXILIARY Contact Y‐PH Main Contact Y‐PH PIR AUXILIARY Contact Y‐PH Main Contact Y‐PH PIR AUXILIARY Contact B‐PH Main Contact B‐PH PIR AUXILIARY Contact B‐PH Main Contact B‐PH PIR AUXILIARY Contact

BREAK BREAK‐I BREAK‐II BREAK‐I BREAK‐II BREAK‐I BREAK‐II

CLOSE

OPEN TRIP‐I

TRIP‐II

17. IR VALUE OF CONTROL CIRCUIT: (Use 500 V Megger) Before Meggering isolate DC for Trip Coil ‐ I & II and Closing Coil COIL DETAIL

MEASURED VALUE (MΩ)

R‐Phase Trip Coil ‐ I

R‐Phase Trip Coil ‐ II

R‐Phase Closing Coil ‐ II

Page 39 of 72

CLOSE OPEN USING TRIP‐I TRIP‐II

Y‐Phase Trip Coil ‐ I

Y‐Phase Trip Coil ‐ II

Y‐Phase Closing Coil ‐ II

B‐Phase Trip Coil ‐ I

B‐Phase Trip Coil ‐ II

B‐Phase Closing Coil ‐ II

18. IR VALUE WITH BREAKER OPEN: (Using 5000 V Megger) ACROSS OPEN CONTACT R‐Phase Break ‐ I R‐Phase Break ‐ II Y‐Phase Break ‐ I Y‐Phase Break ‐ II B‐Phase Break ‐ I B‐Phase Break ‐ II

MEASUREMENT VALUE (MΩ)

19. IR VALUE WITH RESPECT TO EARTH WITH BREAKER CLOSED, EARTH SWITCH AND ISOLATOR OPEN : (USING 5000 VOLT MEGGER) BETWEEN

MEASUREMENT VALUE (MΩ)

R‐PHASE and EARTH

Y‐PHASE and EARTH

B‐PHASE and EARTH

20. MINIMUM PICKUP VOLTAGE OF COILS: COIL DETAILS R‐Phase Trip Coil ‐ I R‐Phase Trip Coil ‐ II R‐Phase Closing Coil Y‐Phase Trip Coil ‐ I Y‐Phase Trip Coil ‐ II Y‐Phase Closing Coil B‐Phase Trip Coil ‐ I B‐Phase Trip Coil ‐ II B‐Phase Closing Coil

MEASUREMENT VALUE (V)

21. GRADING CAPACITOR: 21.1.

DETAILS

Page 40 of 72

DETAILS

INTERRUPTER ‐ 1

INTERRUPTER ‐ 2

R

Y

B

R

Y

B

MAKE

Serial No.

Capacitance value

Year of Manufacture

21.2.

CAPACITANCE AND TAN DELTA MEASUREMENT: (To be done on UST mode) DESCRIPTION

INTERRUPTER ‐ 1

INTERRUPTER ‐ 2

R

Y

B

R

Y

B

SITE

FACTORY

FACTORY

SITE

CAPACITANCE:

TAN DELTA:

22. CONTACT RESISTANCE MEASUREMENT: SL

PHASE

NO

ACROSS EACH POLE

INTERRUPTER ‐ 1

INTERRUPTER ‐ 2

FACTORY

SITE

FACTORY SITE

FACTORY

SITE

1

R‐Phase

2

Y‐Phase

3

B‐Phase

23. BREAKER OPERATION COUNTER READING: Sl No

PHASE

1 2 3

R‐Phase Y‐Phase B‐Phase

COUNTER TYPE ELECTRICAL

READING DATE MECHANICAL

24. CHECK FOR ANNUNCIATION IN CONTROL ROOM: (As per the following formats and record the reading) Page 41 of 72

Sl DESCRIPTION NO TEST 1

2

3

4

5

6

7

8

OF SOURCE OF INITIATION

WINDOW/HMI DESCRIPTION

RESULT OK NOT OK Source I/II DC Switch off the DC Control source in control cubicle DC Fail, AC Fail Switch cubicle ON/OFF Source I/II DC Switch off the AC Control source in control cubicle AC Fail, AC Fail cubicle Switch ON/OFF Short the ALARM contacts of SF6 GAS Density Monitor R ‐ Phase DENSITY SF6 GAS DENSITY MONITOR LOW Y‐Phase DENSITY SF6 GAS DENSITY MONITOR LOW B‐Phase DENSITY SF6 GAS DENSITY MONITOR LOW Remove the cable connected to Density Monitor R‐Phase DENSITY OPERATION/CLOS MONITOR ING LOCKOUT Y‐Phase DENSITY OPERATION/CLOS MONITOR ING LOCKOUT B‐Phase DENSITY OPERATION/CLOS MONITOR ING LOCKOUT Pole Give Tripping PD Relay at Breaker Discrepancy command to R‐Ph CB Cubicle only and check the operation of Pole Discrepancy Relay Pole Give Tripping PD Relay at Breaker Discrepancy command to Y‐Ph CB Cubicle only and check the operation of Pole Discrepancy Relay Pole Give Tripping PD Relay at Breaker Discrepancy command to Y‐Ph CB Cubicle only and check the operation of Pole Discrepancy Relay Breaker Auto‐Trip Close the breaker Protection and Trip through relay as per Protection which scheme are applicable

REMARKS

NOTE: The tripping details are to be checked as per the Scheme approved by design. 25. Operation time measurement of pole discrepancy relay: 26. Mechanical close interlock checked (wherever applicable): Page 42 of 72

Yes / No

27. FINAL DOCUMENTATION REVIEW : a) b)

c)

d)

Factory Test results are available Final document of pre‐commissioning checks Reviewed and Approved: Documents regarding spares, equipment, O& M Manuals etc. available at site for o & m purpose: After modification, if any, "as built drawings" are available at site:

YES / NO

YES / NO

YES / NO

YES / NO




Page 43 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF CURRENT TRANSFORMER COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NAME / NO:

DATE OF ERECTION:


EQUIPMENT SERIAL NO: R‐Phase___________ Y‐PHASE____________B‐PHASE______________ Type:

MAKE:

DEAD TANK:

LIVE TANK:

RATIO SELECTION:

PRIMARY / SECONDARY

Voltage level, kV

33

132

220

400

YEAR OF MANUFACTURE: PURCHASE ORDER NO: RATED DATA & CLASS OF ACCURACY: CORE

RATIO

BURDEN

WINDING ‐ I WINDING ‐ II WINDING ‐ III WINDING ‐ IV WINDING ‐ V

ACCURACY CLASS

KNEE POINT VOLTAGE (KVP)

1.0

DETAIL:

SL No

DESCRIPTION

STATUS YES NO

i).

Equipment is cleaned and free from Dust / Dirt foreign materials etc. Equipment is free from all visible defects on physical inspection Check ct tank has been provided With double earthing (dead tank CT’s) Check that CT junction box is earthed All nuts and bolts are tightened correctly as per specified torque Check tightness of terminal connector

REMARKS RECORD DEFICENCIES, IF ANY

ii). iii). iv). v). vi).

Page 44 of 72

vii).

All fittings as per Out line General Arrangement drawing. Levelling and alignment of structure and base frame is checked Erection completion certificate along with list of outstanding activities Reviewed Any paint removed / scratched in transit has been touched up Check primary polarity of CT,s erected as per relevant drawing. Check hermetically sealing is intact

xv).

Check the oil level and leakage through any joints / Sec. Terminals Check oil drain valve is properly Closed and locked. Oil Level & Oil sampling

xvi).

N2 pressure checked (wherever applicable)

xvii).

Oil level on top chamber gauge glass

viii). ix).

x). xi). xii). xiii). xiv).

xviii). BDV of oil sample taken from tank bottom drain valve ( only if Nitrogen Pressure is measured zero ) xix). All the cable identification tags provided and all cores are provided with identification ferrules at M.B. xx). Check secondary cable end box is properly fixed and ensure cable entry at the bottom and unused holes sealed xxi). Ensure interpole cabling is completed And check the continuity. xxii). Check the IR value of secondary cable xxiii). Check external cabling from junction box to relay / control panel completed xxiv). Ensure unused secondary cores, if any, has been shorted xxv). Check star point has been formed properly and grounded at one end only xxvi). Check spark gap setting in P1 terminal (wherever provided/ possible) Permanent pole levelling and identification markings made xxvii). Check TAN DELTA test tap is properly earthed xxviii). Check that lugs used in secondary circuit are of ring type xxix). Check direction of PRIMARY (P1/ P2) w.r.t.

Page 45 of 72

BUS/LINE on erection Provision of bimetallic strips (Cu +AL) ensured wherever applicable

xxx).

2.0

INSULATION RESISTANCE MEASUREMENT: ( USING 5KV MEGGER) Sl No. of Megger: Make: Calibration valid up to: _____/______/______ Ambient temperature:_______0C Relative Humidity: NOTE: A) Remove the connected earthing to system involving CT under test B) Disconnect the connected terminals of CT M.Box C) Permissible values is 1000 MΩ.

SL No 1 2 3 4 5 6

CORE PRIMARY – CORE I PRIMARY – CORE II PRIMARY – CORE III PRIMARY – CORE IV PRIMARY – CORE V PRIMARY – EARTH

R‐Phase (MΩ)

PHASE Y‐Phase (MΩ)

B‐Phase (MΩ)

3.0

INSULATION RESISTANCE MEASUREMENT: (Using 500 V Megger) Sl No. of Megger: Make: Calibration valid up to: _____/______/______ Ambient temperature:_______0C a) SL No 1 2 3 4 5 6

CORE CORE I ‐ Earth CORE II ‐ Earth CORE III ‐ Earth CORE IV ‐ Earth CORE V ‐ Earth EARTH ‐ Earth

R‐Phase (MΩ)


B‐Phase (MΩ)

R‐Phase (MΩ)


B‐Phase (MΩ)

b) SL No

CORE

Page 46 of 72

1 2 3 4 5 6 7 8 9 10

CORE I – CORE II CORE I – CORE III CORE I ‐ CORE IV CORE I – CORE V CORE II – CORE III CORE II – CORE IV CORE II – CORE V CORE III – CORE IV CORE III – CORE V CORE IV – CORE V

4.0

CHECK IR VALUE BETWEEN TAN DELTA POINT AND EARTH ( AT 1 KV IN SECONDARY BOX) R‐Phase ________ MΩ,

Y‐Phase_________ MΩ

B‐Phase_________ MΩ

5.0

SECONDARY WINDING RESISTANCE (IN OHM) Details of Testing equipment: Make:

Date of testing: ______/_____/_____

Calibration valid up to: _____/______/______ Ambient temperature:_______0C CORE

CORE‐I

CORE‐II

CORE‐III

CORE‐IV

CORE‐V

TERMINAL

R ‐ PHASE

B ‐ PHASE

Factory

Site

Factory Site

Factory Site

1S1 – 1S2

1S1 – 1S3

1S1 – 1S4

2S1 – 2S2

2S1 – 2S3

2S1 – 2S4

3S1 – 3S2

3S1 – 3S3

3S1 – 3S4

4S1 – 4S2

4S1 – 4S3

4S1 – 4S4

5S1‐5S2

5S1‐5S3

Page 47 of 72

Y ‐ PHASE

5S1‐5S4

6.0

POLARITY TEST : (With 1.5 V DC Supply) Connect +VE at P1 & ‐Ve at P2 CORE

BETWEEN

CORE ‐ I

CORE‐II

CORE ‐ III

CORE ‐ IV

CORE ‐ V

PHASE R‐Phase

Y‐Phase

B‐Phase

1S1 (+Ve)

1S2 (‐Ve)

1S1 (+Ve)

1S3 (‐Ve)

1S1 (+Ve)

1S4 (‐Ve)

2S1 (+Ve)

2S2 (‐Ve)

2S1 (+Ve)

2S3 (‐Ve)

2S1 (+Ve)

2S4 (‐Ve)

3S1 (+Ve)

3S2 (‐Ve)

3S1 (+Ve)

3S3 (‐Ve)

3S1 (+Ve)

3S4 (‐Ve)

4S1 (+Ve)

4S2 (‐Ve)

4S1 (+Ve)

4S3 (‐Ve)

4S1 (+Ve)

4S4 (‐Ve)

5S1 (+Ve)

5S2 (‐Ve)

5S1 (+Ve)

5S3 (‐Ve)

5S1 (+Ve)

5S4 (‐Ve)

7.0

TAN DELTA AND CAPACITANCE MEASUREMENT Sl No. of Test Kit: Make: Calibration valid up to: _____/______/______

Date of Testing: ______/______/______ Ambient temperature:_______0C a)

CAPACITANCE MEASRUEMENT VOLTAGE

CAPACITANCE (MEASURED VALUE) R‐Phase

2 kV

Y‐Phase

B‐Phase

FACTORY SITE

FACTORY SITE

FACTORY SITE

Page 48 of 72

REMARKS

10 kV

b)

TAN DELTA MEASUREMENT VOLTAGE

TAN DELTA (MEASURED VALUE) R‐Phase

Y‐Phase

REMARKS

B‐Phase

FACTORY SITE

FACTORY SITE

FACTORY SITE

2 kV

10 kV

8.0

CURRENT RATIO TEST Sl No. of Test Kit: Make: Primary Current Range:

Calibration valid up to: _____/______/______

VA Burden:


R – PHASE CORE

PRIMARY CURRENT % ACTUAL CORE‐I 20% (1S1‐1S2) 40% 80% CORE‐II 20% (2S1– 2S2) 40% 80% CORE‐III 20% (3S1‐3S2) 40% 80% CORE‐IV 20% (4S1‐4S2) 40% 80% CORE‐V 20% (5S1‐5S2) 40% 80% CORE‐I 20% (1S1‐1S3) 40% 80% CORE‐II 20% (2S1– 2S3) 40% 80% CORE‐III 20% (3S1‐3S3) 40%

SECONDARY CURRENT

Page 49 of 72

THERITICAL RATIO

ACTUAL RATIO

% OF ERROR

80% CORE‐IV 20% (4S1‐4S3) 40% 80% CORE‐V 20% (5S1‐5S3) 40% 80% CORE‐I 20% (1S1‐1S4) 40% 80% CORE‐II 20% (2S1– 2S4) 40% 80% CORE‐III 20% (3S1‐3S4) 40% 80% CORE‐IV 20% (4S1‐4S4) 40% 80% CORE‐V 20% (5S1‐5S4) 40% 80% b)

SECONDARY CURRENT

THERITICAL RATIO

ACTUAL RATIO

% OF ERROR

Y – PHASE CORE


Page 50 of 72

80% CORE‐IV 20% (4S1‐4S3) 40% 80% CORE‐V 20% (5S1‐5S3) 40% 80% CORE‐I 20% (1S1‐1S4) 40% 80% CORE‐II 20% (2S1– 2S4) 40% 80% CORE‐III 20% (3S1‐3S4) 40% 80% CORE‐IV 20% (4S1‐4S4) 40% 80% CORE‐V 20% (5S1‐5S4) 40% 80% c)

SECONDARY CURRENT

THERITICAL RATIO

ACTUAL RATIO

% OF ERROR

B‐PHASE CORE


Page 51 of 72

80% CORE‐IV 20% (4S1‐4S3) 40% 80% CORE‐V 20% (5S1‐5S3) 40% 80% CORE‐I 20% (1S1‐1S4) 40% 80% CORE‐II 20% (2S1– 2S4) 40% 80% CORE‐III 20% (3S1‐3S4) 40% 80% CORE‐IV 20% (4S1‐4S4) 40% 80% CORE‐V 20% (5S1‐5S4) 40% 80% 9.0

MAGNETISING CURVES PERFORMANCE KNEE POINT VOLTAGE ( KVp ) _______________ VOLT Sl No. of Test Kit: Make: Calibration valid up to: _____/______/______


R – PHASE VOLTAGE To be Actual applied Value 0.25xKVP 0.5xKVP 0.75xKVP 1.00xKVP 1.10xKVP

b)

CURRENT MEASUREMENT (mA) CORE‐I CORE‐II CORE‐III CORE‐IV 1S1‐1S2 2S1 – 2S2 3S1‐3S2 4S1‐4S2 Not to apply for Metering Core

CORE‐V 5S1‐5S2

CURRENT MEASUREMENT (mA) CORE‐I CORE‐II CORE‐III CORE‐IV 1S1‐1S2 2S1 – 2S2 3S1‐3S2 4S1‐4S2 Not to

CORE‐V 5S1‐5S2

Y – PHASE VOLTAGE To be Actual applied Value 0.25xKVP

Page 52 of 72

0.5xKVP 0.75xKVP 1.00xKVP 1.10xKVP

apply for Metering Core

c) B – PHASE VOLTAGE To be Actual applied Value 0.25xKVP 0.5xKVP 0.75xKVP 1.00xKVP 1.10xKVP

CURRENT MEASUREMENT (mA) CORE‐I CORE‐II CORE‐III CORE‐IV 1S1‐1S2 2S1 – 2S2 3S1‐3S2 4S1‐4S2 Not to apply for Metering Core

CORE‐V 5S1‐5S2

NOTE : 1.0 CT should not saturate at 110 % of knee point voltage ( KVp ) 2.0 If knee point voltage is not mentioned then knee point current may be taken into consideration 10.0 CONTACT RESISTANCE MEASUREMENT Details of Test Kit: CONTACT RESISTANCE

R‐Phase (μΩ)

Y‐Phase(μΩ) B‐Phase(μΩ)

Across terminal P1

Across terminal P2

NOTE : The value of contact resistance should not be more than 10 μΩ PER JOINT / CONNECTOR. 11.0 DGA TEST OF CT OIL (AFTER ONE MONTH OF COMMISSIONING) (Sample to be taken at 250 ml bottle) DISOLVE GAS Total Gas% H2 CH4 C2H4 C2H6 C2H2 CO CO2 O2 N2

R‐PHASE

Y‐PHASE

B‐PHASE

Page 53 of 72

REMARKS

12.0 FINAL DOCUMENTATION REVIEW : a)

b)

c)


YES / NO

YES / NO

YES / NO




Page 54 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF CAPACITOR VOLTAGE TRANSFORMER COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NAME / NO:

DATE OF ERECTION:


Voltage level, kV

132

220

400

DETAILS OF EQUIPMENT: DESCRIPTION PURCHASE ORDER NO MAKE TYPE SERIAL NO CAPACITANCE (pF)

R‐PHASE

Y‐PHASE

B‐PHASE

WINDING‐I

WINDING‐II

WINDING‐III

SECONDARY DETAILS: DESCRIPTION VOLTAGE (V) VA BURDEN (VA) CLASS PURPOSE 1.0 SL No i). ii). iii). iv). v). vi). vii).

DETAILS OF CHECK LIST: DESCRIPTION

STATUS YES NO

Equipment is cleaned and free from Dust / Dirt foreign materials etc. Equipment is free from all visible defects on physical inspection Check CVT tank has been provided With double earthing Check that CVT Marshalling Box is earthed All nuts and bolts are tightened correctly as per specified torque Check tightness of terminal connector All fittings as per Out line General Arrangement drawing.


Page 55 of 72

viii).

Levelling and Identification marking is carried out. ix). Levelling and alignment of structure and base frame is checked x). Erection completion certificate along with list of outstanding activities Reviewed xi). Any paint removed / scratched in transit has been touched up xii). Sl. No of HV CAPACITOR identical to the Sl.no mentioned on RATING & DIG. PLATE xiii). Ensure brass vent plug between stacks of CVT's is removed xiv). Check the oil level and leakage through any joints / Sec. Terminals xv). Check oil drain valve is properly Closed and locked. xvi). Oil Level on tank Gauge Glass xvii). BDV of oil sample taken from tank bottom drain valve xviii). Check secondary cable end box is properly fixed and ensure cable entry at the bottom and unused holes sealed xix). Ensure H.F terminal of unused phases has been earthed and no load on H.F terminal bushing xx). Check RATING / HEALTHINESS of Fuses at CVT M.B and CVT terminal box. xxi). Check that the neutral point is earthed xxii). Ensure interpole cabling is completed and check the continuity xxiii). Check the IR value of secondary cable xxiv). Check external cabling from junction box to relay / control panel completed xxv). All the cable identification tags provided and all cores are provided with identification ferrules at M.B. 2.0

3.0

CONTINUITY OF WINDING: (After removing Earth Link 1, 2 & 3) Sl No BETWEEN TERMINAL OK NOT OK A 1a – 1n B 2a – 2n C 3a – 3n INSULATION RESISTANCE MEASUREMENT: (Using 5 kV Megger) Details of Megger: Page 56 of 72

SL No:

Type:

Make:

Ambient Temperature: __________0C Sl No

BETWEEN R ‐ Phase

4.0

i) Primary – Secondary CORE 1 ii) Primary – Secondary CORE 2 iii) Primary – Secondary CORE 3 iv) Primary ‐ Earth INSULATION RESISTANCE MEASUREMENT: (Using 500 V Megger) Details of Megger: Sl No BETWEEN

5.0

MEASURED VALUE (MΩ) Y ‐ Phase B ‐ Phase

i) Secondary CORE 1 ‐ Earth ii) Secondary CORE 2 ‐ Earth iii) Secondary CORE 3 ‐Earth iv) CORE 1 – CORE 2 v) CORE 1 – CORE 3 vi) CORE 2 – CORE 3 VOLTAGE RATIO TEST:

MEASURED VALUE (MΩ) R ‐ Phase Y ‐ Phase B ‐ Phase

Details of Testing Instruments: PHASE PRIMARY R Y B

SECONDARY VOLTAGE Between Value 1a – 1n 2a – 2n 3a – 3n 1a – 1n 2a – 2n 3a – 3n 1a – 1n 2a – 2n 3a – 3n

THEORITICAL RATIO

ACTUAL RATIO FACTORY SITE

% ERROR

6.0

NOTE : 1. Apply voltage of the order of 500 V or more across line capacitor ( top flange ) to earth link 2. Ensure all earth links connected TAN DELTA AND CAPACITANCE MEASUREMENT Sl No. of Test Kit: Make: Page 57 of 72

Serial No: Calibration valid up to: _____/______/______

Date of Testing: ______/______/______ Ambient temperature:_______0C a) CAPACITANCE MEASRUEMENT VOLTAGE

CAPACITANCE (MEASURED VALUE) R‐Phase

Y‐Phase

REMARKS

B‐Phase

FACTORY SITE

FACTORY SITE

FACTORY SITE

2 kV

10 kV

a) TAN DELTA MEASUREMENT VOLTAGE

TAN DELTA (MEASURED VALUE) R‐Phase

Y‐Phase

REMARKS

B‐Phase

FACTORY SITE

FACTORY SITE

FACTORY SITE

2 kV

10 kV

7.0

FINAL DOCUMENTATION REVIEW : d)

e)

f)


YES / NO

YES / NO

YES / NO




Page 58 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF SURGE ARRESTER COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NAME / NO:

DATE OF ERECTION:


Voltage level, kV

33

132

220

400

DETAILS OF EQUIPMENT: DESCRIPTION PURCHASE ORDER NO MAKE TYPE SERIAL NO RATING 1.0

R‐PHASE

Y‐PHASE

B‐PHASE

DETAILS: CHECK LIST / TESTING

SL No

DESCRIPTION

STATUS YES NO

i).

Equipment is cleaned and free from Dust / Dirt foreign materials etc. Equipment is free from all visible defects on physical inspection Support structures have been provided with double earth All nuts and bolts are tightened correctly as per specified torque Equipment erection is complete in all respect (ATTACH REMAINING ACTIVITIES,IF ANY) Levelling and Identification marking is carried out. Levelling and alignment of structure and base frame is checked All insulators & Surge counter are free from any physical defects Check tightness of all nuts & bolts and terminal connector Erection completion certificate along with list of outstanding activities


ii). iii). iv). v).

vi). vii). viii). ix). x).

Page 59 of 72

reviewed Check one end of surge counter is connected to the bottom of la stack and one end of surge counter has been earth The direction of the exhaust vent ports away from the protected equipment and other arrester poles Clearance from the arrester to earthed objects and from the arrester pole to another arrester pole maintained as per Outline drawing and all erection has been done as per approved drawing. Check the serial no. and sequence of LA parts for erection in multi stack LA Check the alignment of Corona Ring Check on charging, the Surge Counter pointer is in green zone

xi).

xii).

xiii).

xiv). xv). xvi).

2.0

INSULATION RESISTANCE MEASUREMENT: (Using 5 kV Megger) Sl No. of Test Kit: Make: Calibration valid up to: _____/______/______

Date of Testing: ______/______/______ Ambient temperature:_______0C Sl No a b c d e f 3.0

st

1 Stack ‐ Earth 2nd Stack ‐ Earth 3rd Stack ‐ Earth 4th Stack ‐ Earth 5th Stack ‐ Earth 6th Stack ‐ Earth

R‐Phase (MΩ)


B‐Phase (MΩ)

R‐Phase

PHASE Y‐Phase

B‐Phase

SURGE COUNTER READING: Sl No a b c

4.0

BETWEEN

READING Counter Serial No. Counter Make Counter Reading

CAPACITANCE & TAN DELTA MEASUREMENT: Page 60 of 72

Sl No. of Test Kit: Make: Calibration valid up to: _____/______/______

Date of Testing: ______/______/______ Ambient temperature:_______0C VOLTAGE 2 kV

10 kV

STACK TOP MIDDLE 1 MIDDLE 2 BOTTOM TOP MIDDLE 1 MIDDLE 2 BOTTOM

CAPACITANCE

TAN DELTA

REMARKS

5.0

CHECKING OF HEALTHINESS OF SURGE MONITOR :

6.0

FINAL DOCUMENTATION REVIEW : g)

h)

i)


OK / NOT OK

YES / NO

YES / NO

YES / NO




Page 61 of 72


ASSAM ELECTRICITY GRID CORPORATION LIMITED PRE‐COMMISSIONING OF 220 kV LINE RELAY & CONTROL PANEL COMMISSIONING FORMATS DOC NO:

SUBSTATION:

BAY NAME / NO:

DATE OF ERECTION:


Voltage level, kV

33

132

220

Year of Manufacture:

Type of Panel: Swing Simplex/Simplex/Duplex

DC Auxiliary Voltage:

400

DETAILS OF EQUIPMENT: Make:

Purchase Order No:

Panel Overall Dimensions: Relay Specifications Details: Sl No

1 2 3

Relay Type Make

Main ‐1 Main – 2 Line Differential

Relay Ordering Code

Relay Compatibility

Nos. of BI & BO

IEC 61850

BI

BO

Type & Nos. of No. of Communication Analogue Channel Ports Modbus RJ 45 Serial

Yes

No

1.0

DETAILS: CHECK LIST / TESTING a.

Sl No 1 2 3 4 5

Wiring

As per norms Wiring done using PVC insulated 650 grade singlecore multi strands annealed copper conductor flexible wire. 2.5 Sqmm Red, Yellow, Blue & Black for CT Circuit 2.5 Sqmm Red, Yellow, Blue & Black for PT Circuit 2.5 Sqmm for 240V AC circuits 1.5 Sqmm Grey for DC circuits Page 62 of 72

Remarks

6 7

1.5 Sqmm Black for AC circuits 2.5 Sqmm Green for Earthing Circuit

b. Sl No 1

As per norms

3

c. Sl No 1 2

Remarks

Yes

No

Remarks

Checking of AC Supervision Relay

DC DISTRIBUTION

As per norms

Yes

No

Remarks

Checking of DC Supervision Relay Source-1 Source-2 Changeover between Sources a) Electro Mechanical switch b) Through changeover relays e.

VOLTAGE SELECTION RELAYS As per norms

Yes

75 A 75 B Check VTSS (BPT-LPT)

Page 63 of 72

No

AC DISTRIBUTION: As per norms

d.

Sl No 1 2 3

Yes

1 no. Copper Bar of size 25 x 6 mm will be run throughout the board Earthing between equipments will be looped & finally terminated in Earth bar Earth bar coupling link of copper will be provided between adjacent panels

2

Sl No 1 2 3 4

EARTHING:

No

Remarks

f. Sl No 1 2 3 4 5

METERING CIRCUIT As per norms

No

Remarks

Yes

No

Remarks

Yes

No

Remarks

W Meter VAR Meter V Meter A Meter TVM Meter g.

Sl No 1 2

SYNCHRONISING CIRCUIT As per norms Bus PT Supply Circuit Line CVT Supply Circuit

h. Sl No 1

CT CIRCUIT As per norms Metering Circuit Star Point Continuity Earthing should be either at CT JB or at Panel end Main Protection Circuit Star Point Continuity Earthing should be either at CT JB or at Panel end B/U Protection Circuit Star Point Continuity Earthing should be either at CT JB or at Panel end BBP Protection Circuit Star Point Continuity Earthing should be either at CT JB or at Panel end

2

3

4

i.

Input Circuit

Page 64 of 72

Yes

Sl No 1 2 3 4 5

As per norms

As per norms

9 10 11 12

13

14 15 j.

7

Yes

No

Remarks

Yes

No

Remarks

Carrier circuit As per norms Carrier Channel I Received Carrier Channel I Healthy Carrier Channel I Send Carrier Channel II Send Carrier Channel II Received Carrier Channel II Healthy Carrier Channel I Send Carrier Channel II Send Direct Trip Received Channel I Page 65 of 72

Remarks

External LBB/ A/R Initiation R phase Y phase B phase A/R Switch ON Carrier Channel I Healthy Carrier Channel II Healthy Carrier Channel I Received SOTF Initiation A/R Block Main CB Open Status R phase Y phase B phase TBC CB Open Status R phase Y phase B phase Main CB Ready for A/R TBC CB Ready for A/R

7 8

4 5 6

No

Main/TBC CB R phase Open Main/TBC CB Y phase Open Main/TBC CB B phase Open Main/TBC CB Ready for A/R Carrier Out of Service

Sl No 6

Sl No 1 2 3

Yes

Channel II Direct Trip Send Channel I Channel II

8 9 10 k. Sl No 1

As per norms

3

No

Remarks

Yes

No

Remarks

Master Trip Relay : 86 B Optd Distance Prot Optd. B/U Protection Optd. DT Received Ch-I DT Received Ch-II Auxiliary Trip Relay: 86 X (RL-1) Optd. Auxiliary Trip Relay: 86 X (RL-2) Optd.

4

l.

LBB Trip Relay Circuit As per norms LBB -96 Realy Optd. Check all the Trip Extensions as per scheme i) ii) iii) iv) v) vi) Page 66 of 72

Yes

1φ Trip R-φ : 86 R1 1φ Trip Y-φ : 86 Y1 1φ Trip B-φ : 86 B1 1φ Trip R-φ : 86 R2 1φ Trip Y-φ : 86 Y2 1φ Trip B-φ : 86 B2 Master Trip Relay : 86 A Optd Distance Prot Optd. B/U Protection Optd. DT Received Ch-I DT Received Ch-II

2

Sl No 1 2

Single Phase/ Three Phase Initiation Circuit

vii)

m. Sl No 1

CB Closing & Manual Trip Circuit

As per norms

Yes

Remarks

DC Supply-1 to CB DC Supply-2 to CB

2 3

Auto Reclose/ Remote Close Manual Trip-1 (TC-1)/ (TC-2)

n.

CB TC-1 / TC 2 Circuit (Protection Trip/Post Close Supn) & Pre Close Supervision

Sl No 1

As per norms

2

Group A Trip Optd.

Yes

1-φ Optd. From Main Prot. Relay

Group B Trip Optd. 3

LBB/ BB Optd.

4

195 R 195 Y 195 B

o.

TTX Contact Multiplication Circuit (Related to TTS) Page 67 of 72

No

No

Remarks

Sl No 1

As per norms

Yes

No

Remarks

Yes

No

Remarks

Yes

No

Remarks

TTX 1 TTX 2 TTX3

2 p. Sl No 1

TBC TRIPPING CIRCUIT As per norms 86 A Extension 86 B extension 1-φ Trip Optd. From Main Protection Relay R Y B

2

To LBB Initiation TBC 86 R1 86 Y1 86 B1 86 R2 86 Y2 86 B2

q.

Sl No 1

ISOLATOR CONTROL CIRCUIT

As per norms 89 A Close

Page 68 of 72

89 A Open 89 B Close 89 B Open 89 C Close 89 C Open 89 D Close 89 D Open r. Sl No 1

No

Remarks

Yes

No

Remarks

Line Hot R-φ Healthy Line Hot Y-φ Healthy Line Hot B-φ Healthy

s.

ANNUNCIATION CIRCUIT As per norms DC Fail AC Fail Main Dist Prot. Optd. O/C & E/F Optd. DEF/ SOTF Optd. Page 69 of 72

Yes

CB Open CB Close CB Auto Trip CB Spring Charged 89 A Open 89 B Close 89 B Open 89 BE Close 89 BE Open 89 C Close 89 C Open 89 D Close 89 D Open 89 DE1 Close 89 DE1 Open 89 DE2 Close 89 DE2 Open

2

Sl No 1 2 3 4 5

INDICATION CIRCUIT As per norms

6 7 8 9 10 11 12 13 14 15 16

Carrier CH-I & II Fail A/R Optd. Power Swing Detected Panel AC Supply Fail LBB/BB Optd. Numerical Relay Faulty DT Received Ch-I & II CB TC-1 faulty CB TC-2 faulty SF6 Low Alarm SF6 Lock Out t.

Main Distance Protection Relay

Sl No 1

As per norms

Yes

2

Check PT Circuit (If any Mismatch)

3

Zone Reach Test

4

LBB

5

SOTF Optd.

6

Carrier Send

7

A/R i)

Check CT Circuit (If any Mismatch)

AR Optd Page 70 of 72

No

Remarks

ii)

AR Lock Out

iii)

AR Blocked

8 9

Power Swing Detected Carrier Inter-tripping

10

VT Fuse fail

11

Broken Conductor

u.

Main Distance Protection Relay & Directional B/U Relay

Sl No 12

As per norms

13

Over Voltage Optd.

14 15

Directional B/U Relay Check CT Circuit (If any Mismatch)

16

Check PT Circuit (If any Mismatch)

17

Directionality Test i) Operating Zone

Under Frequency Optd.

ii) 18 19

Yes

Non Operating Zone

Pick Up Test Operating Timing Check

Page 71 of 72

No

Remarks

20

High Set

v.

ISOLATOR INTERLOCK CIRCUIT

Sl No 1

As per norms

2

89 B Interlock

3

89 BE Interlock

4

89 DE1 Interlock

5

89 DE2 Interlock

6

89 D Interlock

7

89 C Interlock

Yes

89 A Interlock

Page 72 of 72

No

Remarks

Precommissioning Test Format

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