GENERAL INFORMATION

~ Power Supply

ORGANISATION : ORGANISATION :

( SUPPLIER REPRESENTATIVE ) ( ERECTION AGENCY ) (POWERGRID SITE I/C) ( POWERGRID COMM TEAM ) (WHEREVER APPLICABLE)

CONTINUITY TEST OF BUSHING CTs

POLARITY TEST OF BUSHING CTs VECTOR GROUP TEST & POLARITY CHECK

NAME OF TEST

MEASUREMENT OF WINDING RESISTANCE SECONDARY WINDING RESISTANCE OF BUSHING CTs

TAN DELTA & CAPACITANCE MEASUREMENT OF BUSHING

INSULATION RESISTANCE MEASUREMENTS OF BUSHING CTs

VOLTAGE RATIO TEST

INSULATION RESISTANCE MEASUREMENT

MAGNETISING CURVES PERFORMANCE

FREQUENCY RESPONSE ANALYSIS STABILITY TEST OF DIFFERENTIAL AND REF PROTECTION

MAGNETISATION CURRENT TEST

FLOATING NEUTRAL VOLTAGE MEASUREMENT SHORT CIRCUIT IMPEDANCE TEST

CHECK LIST OF ELECTRICAL TESTS CARRIED OUT FOR TRANSFORMER

TAN DELTA & CAPACITANCE MEASUREMENT OF WINDINGS

CONTACT RESISTANCE MEASUREMENT

2 a

YES NO

Note: Impact Recorder should be detached from the Transformer/ Reactor preferably when the main unit has been placed on its foundation.

APPLY 1.0 KV DC BETWEEN CL & CC+G

( RECOMMENDED VALUE > 10 M Ohms)'

a ACTIVE PART OF TRANSFORMER SHOULD MINIMUM EXPOSED TO ATMOSPHERE b DURING EXPOSURE OF ACTIVE PART OF TRANSFORMER TO ATMOSPHERE :

YES NO

DRY AIR GENERATOR/ DRY AIR CYLINDERS USED : c

YES NO

BETWEEN CL-G BETWEEN CC-CL

* Please write 'NIL' in case of No Remarks

AMBIENT TEMP.

IMPACT RECORER ANALYSIS

Remarks*

REMARKS

CORE INSULATION CHECK

WHILE ENTERING IN TRANSFORMER TANK, CHECK AVAILABILITY OF PROPER OXYGEN

TRANSFORMER KEPT SEALED WITH N2 IN BETWEEN DIFFERENT ERECTION ACTIVITIES

REMARKS NO

CHECKS/ PRECAUTIONS DURING ERECTION INSULATION VALUE

Note: SHORTING LINK BETWEEN CC, CL & G TO BE REMOVED AND IR VALUE TO BE TAKEN BETWEEN CC-G, CL-G & CC-CL BETWEEN CC-G N2 PRESSURE & DEW POINT RECORD

DURING DISPATCH

NOTE: N2 PRESSURE AND DEW POINT SHOULD BE WITHIN PERMISSIBLE RANGE AS PER GRAPH PROVIDED BY MANUFACTURER AND ALSO GIVEN IN OS DOC NO D-2-03-XX-01-01 REV-01. 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.

CHECKS AFTER RECEIPT OF TRANSFORMER AT SITE:

CHECK MAIN TANK HAS BEEN PROVIDED WITH DOUBLE EARTHING

REMARK

RECORD DEFICIENCIES, IF ANY STATUS

ICT AND ITS AUXILIARIES ARE FREE FROM VISIBLE DEFECTS ON PHYSICAL INSPECTION

DESCRIPTION

CHECK THAT MASHALLING BOX, T/C DRIVING GEAR, DIVERTER, RADIATOR BANK PUMP & FAN MOTOR ETC HAS BEEN EARTHED

CHECK NEUTRAL IS GROUNDED THROUGH SEPARATE CONNECTIONS. ENSURE METALLIC REQUIREMENTS AS PER SPECIFICATION (e.g. Cu) IN EARTHING STRIPS USED ALL FITTINGS AS PER OUT LINE GENERAL ARRANGEMENT DRAWING .

ALL NUTS AND BOLTS ARE TIGHTENED CORRECTLY AS PER SPECIFIED TORQUE (AS PER MANUFACTURERS

RECOMMENDATION)

CHECK OIL DRAIN VALVES ARE PROPERLY CLOSED AND LOCKED.

ERECTION COMPLETION CERTIFICATE ALONG WITH LIST OF OUTSTANDING ACTIVITIES REVIEWED

CHECK TIGHTNESS OF TERMINAL CONNECTORS

CHECK LEVELLING OF TRANSFORMER AND ITS ACCESSORIES

OIL LEVEL IS CORRECT ON ALL BUSHINGS

BUSHINGS ARE CLEAN AND FREE FROM PHYSICAL DAMAGES

CHECK HERMETICALLLY SEALING IS INTACT IN ALL BUSHINGS

CHECK OIL LEAKAGE THROUGH ANY JOINTS / VALVES ETC.

CHECK OIL LEVEL IN MAIN / OLTC CONSERVATOR TANK

CKECK ALL VALVES FOR THEIR OPENING & CLOSING SEQUENCE

CHECK CABLES ARE PROPERLY FIXED AND ENSURE CABLE ENTRY AT THE BOTTOM.

ENSURE ALL POWER AND CONTROL CABLE TERMINALS ARE TIGHTENED

CHECK OIL LEVEL AT CONSERVATOR MATCHES WITH OIL TEMPERATURE OF TRANSFORMER

CHECK THAT LABELLING AND IDENTIFICATION IS PERMANENT AND SATISFACTORY

CHECK OTI AND WTI POCKETS AND REPLENISH THE OIL , IF REQUIRED

CHECK THAT BUCHHOLZ RELAY IS CORRECLY MOUNTED WITH ARROW POINTING TOWARDS CONSERVATOR

CHECK GEAR BOX OIL LEVEL IN OLTC

CHECK AVAILABILITY OF OIL IN THE BREATHER CUP

CHECK ALL ROLLERS ARE LOCKED AND TACK WELDED WITH RAILS ( WHEREEVER APPLICABLE )

CHECK DOOR SEALS OF MARSHALLING BOX IS INTACT AND ALL CABLE GLAND PLATES UNUSED HOLES ARE SEALED

CHECK STAR POINT HAS BEEN FORMED PROPERLY AND GROUNDED AT ONE END ONLY AS PER SCHEME

CHECK BUSHING TEST TAP IS GROUNDED

CHECK NO DEBRIS , LOOSE T & P AND OIL STRAINS ON AND AROUND THE TRANSFORMER

ENSURE UNUSED SECONDARY CORES OF BUSHING CT's, IF ANY, HAS BEEN SHORTED

CKECK THAT PERMANENT AND ADEQUATE LIGHITING ARRANGEMENTS ARE READY

CHECK THAT PRESSURE RELIEF VALVE IS CORRECTLY MOUNTED

CHECK THE COLOUR OF BREATHER SILICA GEL ( BLUE WHEN DRY )

44 CHECK VARIOUS INTERLOCKS PROVIDED WITH FIRE FIGHTING AS PER THE SCHEMATIC REF. DRG NO :

6 YES NO

MAKE

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

CHECK THAT AIR HAS BEEN RELEASED FROM THE RADIATORS AND THEIR HEADERS / OLTC BUCHHOLZ RELAY / MAIN TANK / TANK/ BUSHING TURRETS ETC.

CHECK FIRE PROTECTION SYSTEM & EMULSIFIRE SYSTEM IS ADEQUATE & READY

DESCRIPTION OF INTERLOCKS CHECKED CHECK THAT CC-CL&G ARE SHORTED

CHANGE OVER OPERATION OF AC SUPPLY FROM SOURCE-I TO SOURCE-II CHECKED

CHECK THAT ALL RADIATOR BANK VALVES ON TOP AND BOTTOM HEADERS ARE OPEN

CHECK THE FLANGES OF BUSHING & OLTC FOR ANY CRACK AFTER FIXING

CALIBRATION OF OTI & WTI PERFORMED AS PER PROCEDURE MEASUREMENT OF EARTH RESISTANCE OF ELECTRODE

SERIAL NO.

CHECK THAT ALL CABLES ARE CORRECTLY GLANDED

CHECK EXTERNAL CABLING FROM JUNCTION BOX TO RELAY / CONTROL PANEL COMPLETED

CHECK ALL CABLES AND FERRULS ARE PROVIDED WITH NUMBER AS PER CABLE SCHEDULE (CROSS FERULING TO BE CHECKED)

NO+NC

CIRCUIT REFERENCE TYPE

NOTE: VALUE OF EARTH RESISTANCE< 1.0 OHM LOCATION

VALUE (Before connection to grid) VALUE (After connection to grid)

8.1 BEFORE FILLING OIL, EACH DRUM HAS BEEN PHYSICALLY CHECKED FOR FREE MOISTURE AND APPEARANCE YES NO

8.2

a) CAPACITY :

b) MAKE :

c) LUBRICATING OIL OF VACUUM PUMP CHANGED OR NOT :

d) FILTER PACKS CLEANED OR NOT :

e) WHOLE FILTER MACHINE FLUSHED WITH FRESH OIL OR NOT :

f) VACUUM OBTAINED WITHOUT LOAD (milli bar) :

8.3

a) LUBRICATING OIL CHANGED OR NOT :

b) VACUUM OBTAINED WITHOUT LOAD (milli bar) :

c) DIAMETER OF VACUUM HOSE (50 mm) :

d) DRY ICE CHAMBER EMPLOYED OR NOT :

8.4

a) INSIDE PAINTED OR NOT :

b) SILICA GEL BREATHER PROVIDED OR NOT :

c) ANY OPENING LEFT UNCOVERED :

d) CAPACITY & QUANTITY :

e) CLEANLINESS OF INSIDE OF PIPES/ HOSES TO THE STORAGE TANK :

8.5 EXPOSURE DURING ERECTION Transformer to be kept sealed with N2 in between

a) First day Hrs :

b) Second day Hrs :

c) Third Day Hrs :

d) N2 pressure applied after each days erection work PSI :

e) Ambient Temperature DegC :

f) Average Relative Humidity :

g) Weather Condition rainy/ stormy/ cloudy/sunny :

8.6

a) No. of Cylinders used for displacing the air inside the tank :

b) N2 admitted from bottom valave :

c) Valve at diametriccaly opposite end at top kept open : d) No. of Cylinders used for building up 2 PSI :

N2 SEALING IN CASE OF DELAY IN OIL FILLING VACUUM PUMP FOR EVACUATION OF TRANSFORMER :

REMARKS

e. LEAKAGE = (P2-P1)xV=

a. START EVACUATING ON COMPLETE UNIT

CHECKED

(HOURLY READING TO BE TAKEN)

DATE TIME OTI OF

TANK

Record of filteration and Dry out shall be kept in a register and shall be made a part of the Pre-commissioning document.

DRYING OUT STARTED ON

IF LEAKAGE >3.6, CONTINUE EVACUATING

a. OIL FILLING IS MADE 5. DIVERTER SWITCH HOUSING

VACUUM READING IN TRANSFORMER

TANK OIL CONSERVATOR WITH AIR CELL

diverter switch housing filled and has an air cushion

Above 420 KV, 120 HRS

VACUUM READING IN FILTRATION MACHINE

RECORD OF DRYING OUT PROCESS (IF CARRIED OUT)

REMARKS & SIGN OF Mtc ENGINEER AMBIENT TEMP :

9 a AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

15 SEC. 60 SEC. 600 SEC.

CONNECT NEUTRAL POINT WITH EARTH JOIN 1RI AND 3 RI TERMINALS

-APPLY 415V, 3-PHASE SUPPLY TO HV TERMINALS

3Y1- 1B1

3Y1- N 1R1- N

HV+IV to LV (For 3 Wdg Tr) HV+IV Tto E (For 3 Wdg Tr)

VECTOR GROUP TEST & POLARITY CKECKING

IN CASE THERE IS ANY TEMPERATURE DIFFERENCE BETWEEN MANUFACTURERS TEST CERTIFICATE VALUE AND SITE VALUE, USE TEMPERATURE CORRECTION FACTOR PROVIDED IN OS MANUAL DOC. NO. D-2-03-XX-01-01-Rev01

1B1- 1R1

INSULATION RESISTANCE MEASUREMENT : (USING 500 V MEGGER)

REMARK, IF ANY

HV+IV + LV to E (For 3 Wdg Tr) TESTING INSTRUMENT DETAILS:

STATUS

TESTING EQUIPMENT CALIBRATION VALID OR NOT TESTING EQUIPMENT CALIBRATION VALID OR NOT

DESCRIPTION

ENSURE 2R1 -N = 2Y1 -N = 2B1 - N = CONSTANT AS 3R1 -N > 3Y1 - N > 3B1 - N, AND 3Y1 - 1B1 > 3Y1 - 1Y1

VECTOR GROUP Ynaod11 IS CONFIRMED AND POLARITY VERIFIED

: TESTING EQUIPMENT CALIBRATION VALID OR NOT : AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

DISCONNENT THE TRANSFORMER NEUTRAL FROM THE GROUND

APPLY 3 PHASE 415 VOLTS TO THE HIGH VOLTAGE WINDING AND MAKE THE MEASUREMENT IN THE

Check: After the test, neutral reconnected to Ground 3R - N

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

BETWEEN (3)

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.

RESISTANCE AT 75 ºC

FLOATING NEUTRAL VOLTAGE MEASUREMENT

1 Y - N

TESTING EQUIPMENT CALIBRATION VALID OR NOT : AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

Compare with factory test results if carried out at factory

: TESTING EQUIPMENT CALIBRATION VALID OR NOT : AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

Remarks: To be done by Automatic Turns ratio meter BETWEEN

CURRENT MEASURED (IN LV SIDE) R - PH m AMPS

Y - PH m AMPS B - PH m AMPS Y - PH m AMPS VOLTAGE APPLIED CURRENT

MEASURED

RATIO FACTORY RATIO

MAGNETISATION CURRENT TEST :

B - PH m AMPS

TAP POS. VOLTAGE MEASURED

* The limiting values given in the above table to be revised as per revision in IS 1866 in future OIL

SAMPLE TAP POS.

OIL CHARACTERISTICS :

VOLTAGE APPLIED VOLTAGE MEASURED

FACTORY RATIO RATIO

a CHECKING OF COOLING EQUIPMENTS : i. ROTATION DIRECTION OF PUMPS

VISUAL INSPECTION OF EQUIPMENT DESCRIPTION

CHARGING CHARGING

OVER LOAD DEVICE OF DRIVING MOTOR LOCAL OPERATION (ELECTRICAL)

STEP BY STEP CONTACTOR

MANUAL OPERATION ON ALL TAPS ( LOCAL ) WITH CONFIRMATION OF THE NO. OF REVOLUTIONS AND LOCKING AT EXTREME TAPS

WINDING RESISTANCE AT ALL TAPS REMOTE OPERATION (ELECTRICAL) TAP POSITION INDICATOR

CHECK OPERATION WITH MASTER FOLLOWER SCHEME ( PARALLEL OPERATION )

OPERATIONAL TEST OF OTHER EQUIPMENTS

AFTER

12 CONTINUITY TEST OF WINDING DURING ONE COMPLETE CYCLE OF OPERATION

b PROTECTION CHECKS

R-PH Y-PH B-PH R-PH Y-PH B-PH

MOHM

R-PH Y-PH B-PH R-PH Y-PH B-PH MEGGER

MOHM

INSULATION RESISTANCE MEASUREMENT OF BUSHING CT's : ( USING 500V MEGGER)

EARTH - CORE I

CONTINUTY, CHECK BETWEEN TERMINAL: OK / NOT OK

a CORE BETWEEN HV IV

TERMINAL R-PH Y-PH B-PH R-PH Y-PH B-PH

CORE I 1S1 - 1S2 CORE II 2S1 - 2S2 CORE III 3S1 - 3S2 CORE IV 4S1 - 4S2

b CORE BETWEEN LV NEUTRAL

TERMINAL R-PH Y-PH B-PH

CORE I 1S1 - 1S2 CORE II 2S1 - 2S2 CORE III 3S1 - 3S2 CORE IV 4S1 - 4S2

a HV SIDE

CORE BETWEEN R -PHASE Y -PHASE

TERMINAL FACTORY SITE FACTORY SITE FACTORY SITE

CORE I 1S1 - 1S2 OHM

CORE II 2S1 - 2S2 OHM

CORE III 3S1 - 3S2 OHM

CORE IV 4S1 - 4S2 OHM

b IV SIDE

CORE BETWEEN R -PHASE Y -PHASE

TERMINAL FACTORY SITE FACTORY SITE FACTORY SITE

CORE I 1S1 - 1S2 OHM

CORE II 2S1 - 2S2 OHM

CORE III 3S1 - 3S2 OHM

CORE IV 4S1 - 4S2 OHM

FACTORY TEST REPORT REF NO :

c LV SIDE

CORE BETWEEN R -PHASE Y -PHASE

TERMINAL FACTORY SITE FACTORY SITE FACTORY SITE

CORE I 1S1 - 1S2 OHM

CORE II 2S1 - 2S2 OHM

CORE III 3S1 - 3S2 OHM

CORE IV 4S1 - 4S2 OHM

d NEUTRAL SIDE

CORE BETWEEN NEUTRAL TERMINAL FACTORY SITE CORE I 1S1 - 1S2

SECONDARY WINDING RESISTANCE OF BUSHING CT's (IN OHM) CONTINUITY TEST OF BUSHING CT's :

B -PHASE

(CONNECT +VE AT P1 AND - VE AT P2 )

a CORE BETWEEN HV IV

R-PH Y-PH B-PH R-PH Y-PH B-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)

b CORE BETWEEN LV NEUTRAL

R-PH Y-PH B-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)

MEASURE CURRENT ON THE SECONDARY TERMINALS

a R - PHASE HV SIDE

CORE PRIMARY CURRENT SECONDARY THEORET- ACTUAL % OF

S1 - S2 % ACTUAL CURRENT ICAL RATIO RATIO ERROR

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 %

b Y - PHASE 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 %

POLARITY TEST OF BUSHING CT's : WITH 1.5 V DC SUPPLY

CURRENT RATIO TEST

c B - PHASE

(NOT TO BE DONE FOR METERING CORE)

KNEE POINT VOLTAGE (KVp) = ______________ VOLT

a R - PHASE

MAGNETISING CURVES PERFORMANCE

HV SIDE

INTERMEDIATE VOLTAGE SIDE

O.50 X KVp

e Y - PHASE 10 MICRO-OHMS PER JOINT / CONNECTOR

R-PH Y-PH B-PH

DETAILS R-PH Y-PH B-PH R-PH Y-PH B-PH

MAKE

CONTACT RESISTANCE MEASUREMENT

INTERMEDIATE VOLTAGE SIDE

INTERMEDIATE VOLTAGE SIDE CURRENT MEASUREMENT ACROSS HV BUSHING TERMINAL JOINT ACROSS IV BUSHING TERMINAL JOINT ACROSS LV BUSHING TERMINAL JOINT ACROSS NEUTRAL CONNECTION POINT ACROSS SURGE ARRESTOR CONNECTION

: TESTING EQUIPMENT CALIBRATION VALID OR NOT : AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

VOLTAGE R PHASE Y PHASE B PHASE REMARK SITE FACTORY SITE FACTORY SITE FACTORY

2 KV 10 KV

1 KV

VOLTAGE R PHASE Y PHASE B PHASE REMARK SITE FACTORY SITE FACTORY SITE FACTORY

2 KV 10 KV

1 KV

VOLTAGE R PHASE Y PHASE B PHASE REMARK SITE FACTORY SITE FACTORY SITE FACTORY

2 KV 10 KV

1 KV

VOLTAGE R PHASE Y PHASE B PHASE REMARK SITE FACTORY SITE FACTORY SITE FACTORY

2 KV 10 KV

1 KV

CAPACITANCE ( MEASURED VALUE ) TAN DELTA ( MEASURED VALUE ) CAPACITANCE ( MEASURED VALUE )

INTERMEDIATE VOLTAGE SIDE HIGH VOLTAGE SIDE

TAN DELTA AND CAPACITANCE MEASUREMENT OF BUSHING

MEASUREMENT OF C2 CAPACITANCE*

MEASUREMENT OF C1 CAPACITANCE

MEASUREMENT OF C2 CAPACITANCE*

TAN DELTA ( MEASURED VALUE )

MEASUREMENT OF C1 TAN DELTA MEASUREMENT OF C1 TAN DELTA

MEASUREMENT OF C2 TAN DELTA*

TESTING INSTRUMENT DETAILS

MEASUREMENT OF C2 TAN DELTA*

VOLTAGE R PHASE Y PHASE B PHASE REMARK SITE FACTORY SITE FACTORY SITE FACTORY

2 KV 10 KV

1 KV

VOLTAGE R PHASE Y PHASE B PHASE REMARK SITE FACTORY SITE FACTORY SITE FACTORY

2 KV 10 KV

1 KV

FACTORY TEST REPORT REF NO :

* NOTE C2 VALUES SHALL BE ONLY FOR RECORD PERPOSE.

: TESTING EQUIPMENT CALIBRATION VALID OR NOT : AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

LV/ HV-IV with Guard GSTg Test Mode WINDING

COMBINATION VOLTAGE

* SHOULD BE COMPARABLE (+/- 0.001) WITH FACTORY VALUE SUBJECTED TO MAX OF 0.005.

MEASUREMENT OF C1 TAN DELTA

TESTING INSTRUMENT DETAILS

TAN DELTA AND CAPACITANCE MEASUREMENT OF WINDINGS LOW VOLTAGE SIDE

CAPACITANCE ( MEASURED VALUE )

MEASUREMENT OF C2 TAN DELTA*

CAPACITANCE MEASUREMENT OF C1 CAPACITANCE

MEASUREMENT OF C2 CAPACITANCE*

TAN DELTA ( MEASURED VALUE )

: TESTING EQUIPMENT CALIBRATION VALID OR NOT : AMBIENT TEMPERATURE AT THE TIME OF TEST :

TEMPERATURE OF OIL :

SHORT ALL 3 LV BUSHINGS, HV OPEN SHORT ALL 3 LV BUSHINGS, HV OPEN SHORT ALL 3 LV BUSHINGS, HV OPEN

………A

1U1-N, ……….V ………A

1W1-N, ………V

1V1-N,………..V ………A

2U1-N, ……….V

SHORT ALL 3 LV BUSHINGS, IV OPEN

2V1-N,………..V ………A

2W1-N, ………V

SUPPLY SHORT ALL 3 LV BUSHINGS, IV OPEN SHORT ALL 3 LV BUSHINGS, IV OPEN

………A

SHORT ALL 3 LV BUSHINGS, IV OPEN

………A

SUPPLY SHORT ALL 3 LV BUSHINGS, IV OPEN SHORT ALL 3 LV BUSHINGS, IV OPEN

1V1-N,………..V ………A

1U1-N, ……….V ………A

1W1-N, ………V ………A

SUPPLY SHORT ALL 3 LV BUSHINGS, IV OPEN SHORT ALL 3 LV BUSHINGS, IV OPEN SHORT ALL 3 LV BUSHINGS, IV OPEN

1U1-N, ……….V ………A

1V1-N,………..V ………A

1W1-N, ………V ………A

SL DEVICE SET FOR PROVED

NO ALARM TRIP ALARM TRIP

1 EXCESSIVE WINDING TEMPERATURE.

2 EXCESSIVE OIL TEMPERATURE.

3 OIL FLOW FAILURE NA NA

4 PRESSURE RELIEF VALVE NA NA

5 MAIN TANK BUCHHOLZ RELAY

6 OLTC BUCHHOLZ RELAY NA NA

7 FAN FAILURE NA NA

8 LOW OIL LEVEL (MOG) NA NA

9 DIFERENTIAL RELAY NA NA

10 OVER LOAD RELAY NA NA

11 EARTH FAULT RELAY ( REF ) NA NA

12 OVER CURRENT RELAY NA NA

13 INTER TRIP , IF ANY NA NA

14 TRIP FREE CHECK NA NA

15 BACKUP OVER CURRENT NA NA

16 OVER FLUX

17 PROTECTION SETTINGS APPLIED AS PER ENGG. APPROVED SETTINGS YES NO

18 STABILITY TEST OF DIFFERENTIAL & REF PROTECTION: OK NOT OK

a CARRIED OUT AFTER COMPLETION OF ALL COMMISSIONING ACTIVITIES YES NO

b INTERPRETATION OF TEST RESULTS CARRIED OUT YES NO

c TEST RESULTS MATCHING WITH THE FACTORY RESULTS YES NO

d FACTORY & SITE FRA TEST REPORT AVAILABLE AT SITE YES NO

a ANY ABNORMAL SOUND EMANATING FROM THE TRANSFORMER: YES NO REMARKS NO

CHECKS AFTER CHARGING OF TRANSFORMER

YES PROTECTION AND ALARMS

RECORD THE FOLLOWING AFTER CHARGING ALL ELECTRICAL TEST RESULTS COMPARED WITH FACTORY TEST RESULTS AND FOUND TO BE IN ORDER FREQUENCY RESPONSE ANALYSIS (FRA)

NOTE : PROVE THE TRIPPING OF ASSOCIATED BREAKERS BY ACTUAL OPERATION OF THE VARIOUS DEVICES AND RELAYS AS PER THE SCHEMES.

b NO LOAD CURENT AT RELAY TERMINAL

R PHASE

Y PHASE CT RATIO

B PHASE

c TEMPERATURE (AT THE TIME OF CHARGING)

OTI WTI AMBIENT

e YES NO

f YES NO

a FACTORY TEST RESULTS ARE AVAILABLE YES NO

b FINAL DOCUMENT OF PRE-COMMISSIONING CHECKS YES NO

REVIEWED AND APPROVED

c DOCUMENTS REGARDING SPARES, EQUIPMENT, O & M YES NO MANNUALS ETC AVAILABLE AT SITE FOR O & M

PURPOSE

d AFTER MODIFICATION, IF ANY, "AS BUILT DRAWINGS" YES NO ARE AVAILABLE AT SITE

SIGNATURE : SIGNATURE : SIGNATURE : SIGNATURE :

NAME : NAME : NAME : NAME :

DESIGNATION : DESIGNATION : DESIGNATION : DESIGNATION :

ORGANISATION : ORGANISATION :

( SUPPLIER REPRESENTATIVE ) ( ERECTION AGENCY ) (POWERGRID SITE I/C) ( POWERGRID COMM TEAM ) (WHEREVER APPLICABLE)

OLTC ELCTRICAL OPERATION CHECKED IN IDLE CHARGED CONDITION FROM MIN POSITION TO MAX POSITION AND BACK TO NORMAL POSITION

THERMOVISION SCANNING DONE ATLEAST AFTER 24 HOURS OF LOADING

AND REPEATED AFTER ONE WEEK REMARKS

MAXIMUM TEMPERATURE AFTER 24 HOURS

FINAL DOCUMENTATION REVIEW

REMARKS ºC

A A A

ºC ºC ºC

` a REGION : b DATE OF

RECEIPT AT SITE :

c DATE OF COMPLETION OF d DATE OF

ERECTION & OIL FILLING : ENERGISATION : e DETAILS OF EQUIPMENT :

i LOA NO :

viii TYPE OF NEUTRAL GROUNDING : ix YEAR OF MANUFACTURE : ORGANISATION : ORGANISATION :

( SUPPLIER REPRESENTATIVE ) ( ERECTION AGENCY ) (POWERGRID SITE I/C) ( POWERGRID COMM TEAM ) (WHEREVER APPLICABLE)

WINDING RESISTANCE MEASUREMENT OF NGR

SEC WDG RESISTANCE OF BUSHING CTs INSULATION RESISTANCE MEAS OF BUSHING CT

NAME OF TEST PERFORMED YES/ NO TEST RESULTS OK/

NOTOK INSULATION RESISTANCE MEASUREMENT

CONTACT RESISTANCE MEASUREMENT CAPACITANCE & TAN DELTA OF BUSHING

CONTINUITY TEST OF BUSHING CTs

PROTECTION AND ALARM TEST

STABILITY TEST OF DIFFERENTIAL & REF PROT.

POLARITY TEST OF BUSHING CTs

CAPACITANCE & TAN DELTA OF NGR WINDING CAPACITANCE & TAN DELTA OF WINDING GENERAL INFORMATION

CHECK LIST FOR ELECTRICAL TESTS CARRIED OUT FOR REACTOR

WINDING RESISTANCE MEASUREMENT

3 a

* Please write 'NIL' in case of No Remarks

YES NO

APPLY 1.0 KV DC BETWEEN CL & CC+G

( RECOMMENDED VALUE > 10 M Ohms)'

a ACTIVE PART OF REACTOR SHOULD MINIMUM EXPOSED TO ATMOSPHERE b DURING EXPOSURE OF ACTIVE PART OF REACTOR TO ATMOSPHERE :

c DRY AIR GENERATOR/ DRY AIR CYLINDERS USED : YES NO

Note: Impact Recorder should be detached from the Transformer/ Reactor preferably when the main unit has been placed on its foundation.

REMARKS DURING STORAGE AT

SITE BEFORE COMM.

BRIEF ANALYSIS STATUS

CHECKS AFTER RECEIPT OF REACTOR AT SITE N2 PRESSURE AND DEW POINT RECORD

ANALYSIS REPORT

Note: SHORTING LINK BETWEEN CC, CL & G TO BE REMOVED AND IR VALUE TO BE TAKEN BETWEEN CC-G, CL-G & CC-CL

REMARKS

WHILE ENTERING IN REACTOR TANK, CHECK AVAILABILITY OF PROPER OXYGEN REACTOR KEPT SEALED WITH N2 IN BETWEEN DIFFERENT ERECTION ACTIVITIES

SL. DESCRIPTION STATUS REMARK

NO YES NO RECORD DEFICIENCIES, IF ANY

5.1 REACTOR AND ITS AUXILIARIES ARE FREE FROM VISIBLE DEFECTS ON PHYSICAL INSPECTION

5.2 ALL FITTINGS AS PER OUT LINE GENERAL ARRANGEMENT DRAWING .

5.3 CHECK MAIN TANK HAS BEEN PROVIDED WITH DOUBLE EARTHING

5.4

5.5 CHECK THAT MASHALLING BOX,RADIATOR BANK, PUMP & FAN MOTOR ETC HAS BEEN EARTHED 5.6 ALL NUTS AND BOLTS ARE TIGHTENED

CORRECTLY AS PER SPECIFIED TORQUE (AS PER MANUFACTURER RECOMMENDATION)

5.7 CHECK TIGHTNESS OF TERMINAL CONNECTORS

5.8 CHECK LEVELLING OF REACTOR AND ITS ACCESSORIES

5.9 ERECTION COMPLETION CERTIFICATE ALONG WITH LIST OF OUTSTANDING ACTIVITIES REVIEWED

5.10 ANY PAINT REMOVED / SCRATCHED IN TRANSIT HAS BEEN TOUCHED UP

5.11 BUSHINGS ARE CLEAN AND FREE FROM PHYSICAL DAMAGES

5.12 OIL LEVEL IS CORRECT ON ALL BUSHINGS

5.13 CHECK HERMETICALLLY SEALING IS INTACT IN ALL BUSHINGS

5.14 CHECK OIL LEAKAGE THROUGH ANY JOINTS / VALVES ETC.

CHECK NEUTRAL IS GROUNDED THROUGH SEPARATE CONNECTIONS. ENSURE METALLIC REQUIREMENTS AS PER SPECIFICATION (e.g. Cu) IN EARTHING STRIPS USED

DETAILS :

PRE-COMMISSIONING CHECKS:

5.15 CHECK OIL DRAIN VALVES ARE PROPERLY CLOSED AND LOCKED.

5.16 CHECK OIL LEVEL IN MAIN TANK AND CONSERVATOR TANK

5.17 CHECK OTI AND WTI POCKETS AND REPLENISH THE OIL , IF REQUIRED

5.18 CKECK ALL VALVES FOR THEIR OPENING &

CLOSING SEQUENCE

5.19 CHECK THE COLOUR OF BREATHER SILICA GEL ( BLUE WHEN DRY )

5.20 CHECK AVAILABILITY OF OIL IN THE BREATHER CUP

5.21 CHECK ALL ROLLERS ARE LOCKED AND TACK WELDED WITH RAILS

( WHEREEVER APPLICABLE )

5.22 CHECK BUSHING TEST TAP IS GROUNDED

5.23 CHECK NO DEBRIS , LOOSE T & P AND OIL STRAINS ON AND AROUND THE REACTOR

5.24 CHECK DOOR SEALS OF MARSHALLING BOX

In document Pgcil-latest Testing Format (Page 101-149)