~ Power Supply
4.5.2 50 OPERATION TESTS
3) Inject the Primary current of 200A from point 1 to point 4 with bus earth switch close as shown in Fig. 24 and check the spill current in check zone / bus zone in bus bar
protection panel, measured value is to be around full secondary current (for 2000/1 CT ratio secondary current is 100 mA and spill current may be near 100 mA ) .If no spill current found check the CT bus bar wiring and correct it.
BUSBAR
1 2 3
4 5
BUS EARTH SWITCH CLOSE I
BUSBAR
1 2 3
4 5
BUS EARTH SWITCH CLOSE I
Figure-24: Primary injection with Bus Earth Switch Closed
4) Repeat the above test for all remaining CT combination i.e 1-3 , 1-5 , 1-2 etc
5) If a new bay is added to the BUS, check only new CT with any Old CT of that BUS.
I REGION :
II DATE OF III DATE OF
ERECTION : ENERGISATION :
IV DETAILS OF EQUIPMENT :
LOA NO :
MAKE : TYPE :
SL NO. : R - PHASE : Y - PHASE : B - PHASE :
YEAR OF
MANUFACTURE : FEEDER NAME : V RATED DATA AND DUTY
CORE RATIO CLASS BURDEN KVP PROTECTION / METERING
WINDING I WINDING II WINDING III WINDING IV WINDING V
KVp : KNEE POINT VOLTAGE IN VOLTS VI DETAILS :
SL. DESCRIPTION STATUS
NO YES NO
1 EQUPIMENT IS CLEANED AND FREE FROM DUST / DIRT FOREIGN MATERIALS ETC.
2 EQUIPMENT IS FREE FROM ALL VISIBLE DEFECTS ON PHYSICAL INSPECTION
3 CHECK CT TANK HAS BEEN PROVIDED WITH DOUBLE EARTHING
(DEAD TANK CT's)
4 CHECK THAT CT JUNCTION BOX IS EARTHED.
5 ALL NUTS AND BOLTS ARE TIGHTENED CORRECTLY AS PER SPECIFIED TORQUE
6 CHECK TIGHTNESS OF TERMINAL CONNECTOR
7 ALL FITTINGS AS PER OUT LINE GENERAL ARRANGEMENT DRAWING.
8 LEVELLING AND ALIGNMENT OF STRUCTURE AND BASE FRAME IS CHECKED
9 ERECTION COMPLETION CERTIFICATE ALONG WITH LIST OF OUTSTANDING ACTIVITIES REVIEWED
10 ANY PAINT REMOVED / SCRATCHED IN TRANSIT HAS BEEN TOUCHED UP
11 CHECK PRIMARY POLARITY OF CT,S ERECTED AS PER RELEVANT DRAWING.
RECORD DEFICIENCIES, IF ANY REMARK
12 CHECK HERMETICALLLY SEALING IS INTACT
13 CHECK THE OIL LEVEL AND LEAKAGE THROUGH ANY JOINTS / SEC. TERMINALS
14 CHECK OIL DRAIN VALVE IS PROPERLY CLOSED AND LOCKED.
15 OIL LEVEL & OIL SAMPLING
16 N2 PRESSURE CHECKED (WHEREVER APPLICABLE)
17 OIL LEVEL ON TOP CHAMBER GAUGE GLASS 18 BDV OF OIL SAMPLE TAKEN FROM TANK
BOTTOM DRAIN VALVE ( ONLY IF NITROGEN PRESSURE IS MEASURED ZERO )
19 ALL THE CABLE IDENTIFICATION TAGS PROVIDED AND ALL CORES ARE PROVIDED WITH IDENTIFICATION FERRULES AT M.B.
20 CHECK SECONDARY CABLE END BOX IS PROPERLY FIXED AND ENSURE CABLE ENTRY AT THE BOTTOM AND UNUSED HOLES SEALED
21 ENSURE INTERPOLE CABLING IS COMPLETED AND CHECK THE CONTINUTY.
22 CHECK THE IR VALUE OF SECONDARY CABLE
23 CHECK EXTERNAL CABLING FROM JUNCTION-BOX TO RELAY / CONTROL PANEL COMPLETED
24 ENSURE UNUSED SECONDARY CORES, IF ANY, HAS BEEN SHORTED
25 CHECK STAR POINT HAS BEEN FORMED PROPERLY AND GROUNDED AT ONE END ONLY 26
27 28 29 30
IX INSULATION RESISTANCE MEASUREMENT : ( USING 5KV MEGGER)
DETAILS OF TEST KIT:
NOTE : A) REMOVE THE CONNECTED EARTHING TO SYSTEM INVOLVING CT UNDER TEST
CHECK THAT LUGS USED IN SECONDARY CIRCUIT ARE OF RING TYPE
CHECK DIRECTION OF PRIMARY (P1/ P2) w.r.t. BUS/
LINE ON ERECTION
PERMANENT POLE LAVELLING AND IDENTIFICATION MARKINGS MADE CHECK TAN DELTA TEST TAP IS PROPERLY EARTHED
CHECK SPARK GAP SETTING IN P1 TERMINAL (WHEREVER PROVIDED/ POSSIBLE)
PROVISION OF BIMETALLIC STRIPS (Cu +Al) ENSURED WHEREVER APPLICABLE
PRIMARY - CORE IV MOHM
PRIMARY - CORE V MOHM
PRIMARY - EARTH MOHM
X INSULATION RESISTANCE MEASUREMENT : (USING 500 V MEGGER) DETAILS OF TEST KIT:
PERMISSIBLE VALUES IS 50 MOHMS
A PHASE
R Y B
SECONDARY CORE I - EARTH MOHM
SECONDARY CORE II - EARTH MOHM
SECONDARY CORE III - EARTH MOHM
SECONDARY CORE IV - EARTH MOHM
SECONDARY CORE V - EARTH MOHM
XIII SECONDARY WINDING RESISTANCE (IN OHM) ( BY DIGITAL MULTIMETER )
CORE TERMINAL
FACTORY SITE FACTORY SITE FACTORY SITE
CORE I 1S1 - 1S2 OHM
CHECK IR VALUE BETWEEN TAN DELTA POINT AND EARTH AT 1 KV IN SECONDARY BOX
BETWEEN BETWEEN
XIV POLARITY TEST : WITH 1.5 VOLT DC SUPPLY
XV TAN DELTA AND CAPACITANCE MEASUREMENT (BY AUTOMATIC TAN DELTA KIT) DETAILS OF TEST KIT:
A
VOLTAGE R PHASE Y PHASE B PHASE REMARK
SITE FACTORY SITE FACTORY SITE FACTORY
2 KV 10 KV B
VOLTAGE REMARK
SITE FACTORY SITE FACTORY SITE FACTORY
2 KV 10 KV
FACTORY TEST REPORT REF. NO : XVI CURRENT RATIO TEST
PRIMARY INJECTION THROUGH PRIMARY INJECTION KIT AT PRIMARY TERMINAL P1 - P2 MEASURE CURRENT ON THE SECONDARY TERMINALS
DETAILS OF TEST KIT:
A R - PHASE
CORE PRIMARY CURRENT SECONDARY THEORET- ACTUAL % OF
S1 - S2 % ACTUAL CURRENT ICAL RATIO RATIO ERROR
CORE I 20 % CAPACITANCE ( MEASURED VALUE )
TAN DELTA ( MEASURED VALUE )
R PHASE Y PHASE
80 %
CORE PRIMARY CURRENT SECONDARY THEORET- ACTUAL % OF
S1 - S2 % ACTUAL CURRENT ICAL RATIO RATIO ERROR
CORE I 20 %
CORE II 20 %
CORE PRIMARY CURRENT SECONDARY THEORET- ACTUAL % OF
S1 - S2 % ACTUAL CURRENT ICAL RATIO RATIO ERROR
CORE I 20 %
(3S1 - 3S3) 40 %
NOTE: DURING RATIO TEST OF CT , THE CURRENT LEVEL ATTAINED SHOULD NOT BE LESS THAN 500 A XVII MAGNETISING CURVES PERFORMANCE
KNEE POINT VOLTAGE ( KVp ) _______________ VOLT DETAILS OF TEST KIT:
A R - PHASE APPLIED VALUE 1S1-1S2 2S1 - 2S2 4S1 - 4S2 5S1 - 5S2
O.25 X KVp mA APPLIED VALUE 1S1-1S2 2S1 - 2S2 4S1 - 4S2 5S1 - 5S2
O.25 X KVp mA
O.50 X KVp mA
O.75 X KVp mA
1.O0 X KVp mA
1.10 X KVp mA
NOTE : 1.0 CT SHOULD NOT SATURATE AT 110 % OF KNEEPOINT VOLTAGE ( KVp ) 2.0 IF KNEEPOINT VOLTAGE IS NOT MENTIONED THEN KNEE POINT CURRENT MAY BE TAKEN INTO CONSIDERATION
3.0 MAGNETISATION OF CORE III IS NOT DONE SINCE IT IS USED FOR METERING PURPOSE.
XVIII CONTACT RESISTANCE MEASUREMENT (WHEREVER POSSIBLE/ ACCESIBLE)
DETAILS OF TEST KIT:
R-PHASE Y-PHASE B-PHASE
MICRO OHM MICRO OHM NOTE : THE VALUE OF CONTACT RESISTANCE SHOULD NOT BE MORE THAN 10 MICRO-OHMS PER JOINT / CONNECTOR
XIX TESTS FOR SF6 FILLED 765 KV CTs DETAILS OF TEST KIT:
R Y B
XX DGA TEST OF CT OIL (AFTER ONE MONTH OF COMMISSIONING) TO BE TAKEN IN 250 ml BOTTLES
R PHASE Y PHASE B PHASE
XXI FINAL DOCUMENTATION REVIEW :
A FINAL DOCUMENT OF PRE-COMMISSIONING CHECKS
REVIEWED AND APPROVED YES NO
B DOCUMENTS REGARDING SPARES, EQUIPMENT, O & M MANNUALS ETC AVAILABLE AT SITE FOR O & M
PURPOSE YES NO
C AFTER MODIFICATION, IF ANY, " AS BUILT DRAWINGS "
ARE AVAILABLE AT SITE YES NO
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)
I REGION :
II DATE OF III DATE OF
ERECTION : ENERGIZATION :
IV DETAILS OF EQUIPMENT :
R-PHASE Y-PHASE B-PHASE
LOA NO :
MAKE : TYPE :
SL NO. :
YEAR OF :
MANUFACTURE V FEEDER NAME :
VI PRIMARY VOLTAGE : Kv
VII SECONDARY DETAILS :
WINDING 1 WINDING 2 WINDING 3
VOLTAGE : VOLTS
VA BURDEN : VA
CLASS PURPOSE
VIII DETAILS OF CHECKLIST :
SL. DESCRIPTION STATUS REMARK
NO YES NO RECORD DEFICIENCIES, IF ANY
1 EQUPIMENT IS CLEANED AND FREE FROM DUST / DIRT FOREIGN MATERIALS ETC.
2 EQUIPMENT IS FREE FROM ALL VISIBLE DEFECTS ON PHYSICAL INSPECTION
3 CHECK CVT TANK HAS BEEN PROVIDED WITH DOUBLE EARTHING
4 CHECK THAT CVT MARSHALLING BOX IS EARTHED
5 ALL NUTS AND BOLTS ARE TIGHTENED CORRECTLY AS PER SPECIFIED TORQUE
6 CHECK TIGHTNESS OF TERMINAL CONNECTOR
7 ALL FITTINGS AS PER OUT LINE GENERAL ARRANGEMENT DRAWING.
SL. DESCRIPTION STATUS REMARK
NO YES NO RECORD DEFICIENCIES,IF ANY
8 LAVELLING AND IDENTIFICATION MARKING IS CARRIED OUT
9 LEVELLING AND ALIGNMENT OF STRUCTURE AND BASE FRAME IS CHECKED
10 ERECTION COMPLETION CERTIFICATE ALONG WITH LIST OF OUTSTANDING ACTIVITIES REVIEWED
11 ANY PAINT REMOVED / SCRATCHED IN TRANSIT HAS BEEN TOUCHED UP
12 SL. NO OF HV CAPACITOR IDENTICAL TO THE SL.NO MENTIONED ON RATING & DIG. PLATE
13 ENSURE BRASS VENT PLUG BETWEEN STACKS OF CVT'S IS REMOVED
14 CHECK THE OIL LEVEL AND LEAKAGE THROUGH ANY JOINTS / SEC. TERMINALS
15 CHECK OIL DRAIN VALVE IS PROPERLY CLOSED AND LOCKED.
16 OIL LEVEL ON TANK GAUGE GLASS
17 BDV OF OIL SAMPLE TAKEN FROM TANK BOTTOM DRAIN VALVE
18 CHECK SECONDARY CABLE END BOX IS PROPERLY FIXED AND ENSURE CABLE ENTRY AT THE BOTTOM.
19 ENSURE H.F TERMINAL OF UNUSED PHASES HAS BEEN EARTHED AND NO LOAD ON H.F TERMINAL BUSHING
20 CHECK RATING / HEALTHINESS OF FUSES AT CVT M.B AND CVT TERMINAL BOX.
21 CHECK THAT THE NEUTRAL POINT IS EARTHED
SL. DESCRIPTION STATUS REMARK
NO YES NO RECORD DEFICIENCIES, IF ANY
22 ENSURE INTERPOLE CABLING IS COMPLETED AND CHECK THE CONTINUTY.
23 CHECK THE IR VALUE OF SECONDARY CABLE ( > 50 M OHMS FOR CONTROL CABLES)
24 CHECK EXTERNAL CABLING FROM M.B TO RELAY / CONTROL PANEL COMPLETED 25 ALL THE CABLE IDENTIFICATION TAGS
PROVIDED AND ALL CORES ARE PROVIDED WITH IDENTIFICATION FERRULES AT M.B.
IX CONTINUITY OF WINDING : (After removing Earth Link 1,2 & 3)
A BETWEEN TERMINALS 1a - 1n OK NOT OK
B BETWEEN TERMINALS 2a - 1n OK NOT OK
C BETWEEN TERMINALS 3a - 1n OK NOT OK
X INSULATION RESISTANCE MEASUREMENT :
USING A MEGGER OF 5KV/ 10 KV MIN : 1000 M OHMS BETWEEN MEASURED VALUE
R-PHASE Y-PHASE B-PHASE
PRIMARY - SECONDARY CORE 1 MOHM
PRIMARY - SECONDARY CORE 2 MOHM
PRIMARY - SECONDARY CORE 3 MOHM
PRIMARY - EARTH MOHM
XI SECONDARY WINDING RESISTANCE IN OHMS
PHASE CORE 1 CORE 2 CORE 3 REMARK
FACTORY SITE FACTORY SITE FACTORY SITE
R Y B
FACTORY TEST REPORT REF. NO :
XII INSULATION RESISTANCE MEASUREMENT :
USING A MEGGER OF 500 VOLT MIN : 50 M OHMS BETWEEN MEASURED VALUE
R-PHASE Y-PHASE B-PHASE
SECONDARY CORE 1 - EARTH MOHM
SECONDARY CORE 2 - EARTH MOHM
SECONDARY CORE 3 - EARTH MOHM
CORE 1 - CORE 2 MOHM
CORE 1 - CORE 3 MOHM
CORE 2 - CORE 3 MOHM
XIII VOLTAGE RATIO TEST
PHASE PRIMARY %
VOLTAGE BETWEEN VALUE FACTORY SITE ERROR
R 1a - 1 n
R 2a - 2 n
R 3a - 3 n
Y 1a - 1 n
Y 2a - 2 n
Y 3a - 3 n
B 1a - 1 n
B 2a - 2 n
B 3a - 3 n
NOTE :
1. APPLY VOLTAGE OF THE ORDER OF 500V OR MORE ACROSS LINE CAPACITOR ( TOP FLANGE ) TO EARTH LIN 2. ENSURE ALL EARTH LINKS CONNECTED
XIV ALL TERMINAL BLOCKS CLOSED IN THE SECONDARY AFTER ALL TESTING
XV PHASING ( PHASE RELATIONSHIP ) OF CVT BY MEASURING VOLTAGE BETWEEN R-PHASE, Y-PHASE AND B-PHASE AT INCOMING TERMINAL IN CONTROL CUBICLE,FOR ONE
CIRCUIT OF THE CHECKED CVT AND OUTPUT TERNINALS R-PHASE, Y-PHASE AND B-PH OF A REFERENCE CIRCUIT (EXISTING CVT) WITH KNOWN PHASING
REFERENCE MEASURED VALUE
CIRCUIT R-PHASE Y-PHASE B-PHASE R-PHASE
Y-PHASE B-PHASE
SECONDARY VOLTAGE
ACTUAL RATIO THEORATICAL RATIO
XVI TAN DELTA AND CAPACITANCE MEASUREMENT
DETAILS OF TEST KIT:
ACROSS STACK
R PH Y PH B PH R PH Y PH B PH
TOP MIDDLE BOTTOM TOTAL
R PH Y PH B PH R PH Y PH B PH
TOP MIDDLE BOTTOM TOTAL
FACTORY TEST REPORT REF. NO :
XVII FINAL DOCUMENTATION REVIEW :
A FINAL DOCUMENT OF PRE-COMMISSIONING CHECKS REVIEWED AND APPROVED
B DOCUMENTS REGARDING SPARES,EQUIPMENT, O & M MANNUALS ETC AVAILABLE AT SITE FOR O & M PURPOSE
C AFTER MODIFICATION, IF ANY, "AS BUILT DRAWINGS"
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)
PRE COMMISSIONING VALUES
FACTORY VALUES
CAPACITANCE TAN DELTA
CAPACITANCE TAN DELTA
I REGION :
II ERECTION START DATE : III ERECTION COMPLETION DATE : IV DATE OF ENERGIZATION :
V FEEDER NAME : VI VOLTAGE LEVEL :
VII DETAILS OF EQUIPMENTS INVOLVED :
EQUIPMENT R - PHASE Y - PHASE B - PHASE
ID NO SL NO ID NO SL NO ID NO SL NO
CT
CVT
LA BREAKER
TRANSFORMER REACTOR ISOLATOR
EARTH SWITCH
LINE TRAP
MAKE
VIII DETAILS OF CR PANEL AND PLCC
PANEL IDENTIFICATION IDENTIFICATION IDENTIFICATION
DETAILS NAME NUMBER NAME NUMBER NAME NUMBER
CONTROL PANEL RELAY PANEL PLCC PANEL
RTU PANEL
RECORDING IDENTIFICATION
INSTRUMENTS NAME NUMBER FAULT LOCATOR
EVENT LOGGER
DISTURBANCE RECORDER TIME SYNCRONISATION STRIP CHART RECORDER
IX PROTOCOL DOCUMENTATION
CT
CVT
LA BREAKER
TRANSFORMER REACTOR ISOLATOR
REMARKS EQUIPMENT IDENTIFICA
TION NO
ALL PRE-COMM TESTS CARRIED OUT AS PER FQP
YES/ NO
ALL TEST RESULTS ARE WITHIN THE LIMIT OF
TOLERANCE YES/ NO
JOINT PROTOCOLS OF THE EQUIPMENT INVOLVED IN CHARGING ARE DOCUMENTED AND SIGNED BY ALL
CONCERNED YES/NO
MAKE
EARTH SWITCH
LINE TRAP
CONTROL PANEL
RELAY PANEL
PLCC
RTU PANEL
EQUIPMENT IDENTIFICA TION NO
ALL PRE-COMM TESTS CARRIED OUT AS PER FQP
YES/ NO
ALL TEST RESULTS ARE WITHIN THE LIMIT OF
TOLERANCE YES/ NO
JOINT PROTOCOLS OF THE EQUIPMENT INVOLVED IN CHARGING ARE DOCUMENTED AND SIGNED BY ALL
CONCERNED YES/NO
REMARKS
X CHECK OF BAY MARSHALLING KIOSK
DETAILS IDENTIFICATION NUMBER REMARKS , IF ANY
ILLUMINATION AND HEATER OK/NOT OK OK/NOT OK OK/NOT OK 5 /15 AMP SOCKET
ALL SPECIFIED FUSES IN POSITION EARTHING AT 2 LOCATION
ALL CABLES TIGHTNESS
ALL CABLES ARE PROPERLY GLANDED ALL CABLES HAVE IDENTIFICATION NO ALL CORES HAVE IDENTIFICATION NO SHIELDING WIRES ARE EARTHED FREE FROM DUST AND DAMAGE DOOR HINGES AND LOCKING PAINTS
UNUSED HOLES ARE SEALED XI AVAILABILITY OF THE FOLLOWING
DETAILS STATUS REMARKS
YES/NO TEMPORARY ARRANGEMENT,IF ANY 1 FIRE FIGHTING SYSTEM COMMISSIONED
A FIRE PROTECTION INCLUDING ALARMS YES/NO
B FIRE HYDRANT SYSTEM YES/NO
C FIRE DELUGE (SPINKLER) SYSTEM YES/NO
2 PORTABLE FIRE EXTINGUSHERS ARE
IN POSITION YES/NO
3 FIRE TENDERS CAN BE MADE AVAILABLE FOR ANY
EVENTUALITY YES/NO TEL NO:
4 ALL EQUIPMENT ERECTION AS PER GENERAL
ARRANGEMENT DRAWING ISSUED BY ENGG. YES / NO 5 EQUIPMENT IDENTIFICATION NAME PLATE
ARE PROPERLY FIXED YES / NO
6 ALL BUSPOST INSULATORS ARE CLEANED AND
FREE FROM DUST / DIRT FOREIGN MATERIALS ETC. YES / NO 7 ALL EARTHING POINTS HAVE BEEN EARTHED YES / NO
DETAILS STATUS REMARKS
YES/NO TEMPORARY ARRANGEMENT,IF ANY 8 ALL NUTS AND BOLTS OF BUS BAR ARE TIGHTENED
CORRECTLY AS PER SPECIFIED TORQUE YES / NO 9 ALL CLAMPS AND CONNECTORS ARE AS PER THE
DRAWINGS ISSUES BY ENGG. DEPT AND
CORRECTLY TIGHTENED AS PER SPECIFIED TORQUE YES / NO 10 ANY PAINT REMOVED / SCRATCHED IN
YARD EQUIPMENTS HAVE BEEN TOUCHED UP YES / NO 11 BAY IDENTIFICATION AND DESIGNATION PLATE
ARE ON POSITION WITH R,Y, B PHASE MARKING YES / NO 12 GRAVEL FILLING IN THE YARD (IF DESIGNED)
HAS BEEN DONE YES / NO
13 THE LADDERS / TOOLS / VEHICLES / WORKBENCH / TEMPORARY EARTHING ETC. REMOVED FROM
THE AREA WHICH IS TO BE ENERGIZED YES / NO 14 DC EMERGENCY LIGHT IN OPERATION AND IN AUTO YES / NO 15 DG SET IS AVAILABLE AND IN OPERATION YES / NO 16 SWITCHING SEQUENSES WITH PROCEDURES ARE
DOCUMENTED AND AVAILABLE IN THE CONTROL
ROOM YES / NO
17 REGULAR OPERATION IN THE CONTROL ROOM IS MANNED ROUND THE CLOCK WITH REGULAR
OPERATION STAFF YES / NO
18 ALL PTW ISSUED EARLIER ARE CANCELLED AND
NOTHING ARE PENDING YES / NO
19 OPERATION DATA LOG SHEETS, PTW AND OTHER STANDARD FORMATS OF POWERGRID ARE
AVAILABLE FOR REGULAR OPERATION YES / NO
20 YES / NO
21 YES / NO
22 YES / NO
23 YES / NO
24 YES / NO
CHECK THAT TREATED EARTH PITS ARE COVERED AND NUMBERED
CHECK THE TIGHTNESS OF THE CONNECTING LINKS OF TREATED EARTH PITS
CORE WISE SECONDARY INJECTION TEST FOR BOTH CTs AND PTs INPUTS FROM SECONDARY TERMINAL BOX OF CT/ PT DONE TO DETECT ANY MIXING/
INTERCHANGING OF CORES/ PHASES
CHECK STAR POINTS OF CT & CVT SECONDARY AND ASSOCIATED LINKS IF ANY
CONFIRM COLOR CODING OF ALL EQUIPMENTS AND PHASE MARKING
25 YES / NO
26 YES / NO
27 CHARGING CLEARANCE IS RECEIVED FROM GRID
OPERATION CPCC / IOCC / REB VIDE MSG NO : ___________ TIME :___________ DATED XII MEASUREMENT OF EARTH RESISTANCE HAS BEEN
CARRIED OUT AND THE EARTH RESISTANCE ARE TABULATED
SL. LOCATION DISTANCE BETWEEN RESISTANCE NO DESCRIPTION ELECTRODE
LOCATION - 1 LOCATION - 2 LOCATION - 3 LOCATION - 4 LOCATION - 5 LOCATION - 6
XIII CONTACT TIGHTNESS CHECK BY PRIMARY CURRENT INJECTION
XIV A MEASUREMENT OF SOIL RESISTIVITY DONE EARLIER PRIOR TO COMMISSIONING MAY BE TABULATED
DATE : DISTANCE BETWEEN SOIL REMARK
ELECTRODE RESISTIVITY
B CHECK THE MINIMUM CLEARANCE BETWEEN LIVE PARTS W.R.T GROUNG AND BETWEEN LIVE PARTS . VOLTAGE PHASE TO PHASE TO REMARK , IF ANY
GROUND PHASE
132 kV 1270 mm 1473 mm 220 kV 2082 mm 2368 mm 400 kV 3065 mm 5750 mm 765 KV 6400 mm 9400 mm
NOTE : ALL THE CLEARANCE BETWEEN PHASES & PHASE TO GROUND ARE CHECKED AS PER THE DRGS. ISSUES BY ENGG. DEPT.
NECESSARY CLEARANCES AS APPLICABLE HAVE BEEN OBTAINED
FUSE FAIL PROTECTION CHECKED FOR M1, M2, BACKUP IMPEDANCE ETC
CURRENT INJECTED
CURRENT MEASURED
REMARKS ON CONTACT HEALTHINESS CURRENT
INJECTION AT CURRENT MEASURED AT
XV CHECKING OF INTERLOCKS :
PLEASE REFER THE RELEVENT PLANT CIRCUIT DIADRAM FOR CHECKING THE INTERLOCKS OF VARIOUS EQUIPMENTS TO BE ENERGIZED.
ALL ISOLATORS AND GROUND SWITCHES INTERLOCKINGS ARE CHECKED AS PER THE
DOCUMENT NO CF/ISO/08 YES NO PLEASE GIVE REASONS
IF NO IF NOT REPEAT THE TESTING ON INTERLOCKS YES NO
XVI TRIP TEST
ALL BREAKERS ARE TESTED AND ALL THE TRIPTEST AS PER THE REQUIRED PLANT CIRCUIT DIAGRAMS ARE CARRIED OUT AS PER THE DOCUMENT
NO CF/CB/05 YES NO
XVII STABILITY TEST FOR BUSBAR
TO BE DONE IN LINE WITH APPROVED SCHEME DETAILS OF KIT USED:
CONDITION 1: BUS EARTH SWITCH OPEN
PHASE
CONDITION 2: BUS EARTH SWITCH CLOSED
PHASE
XVIII FINAL TRIP TEST
THE TRIP TEST MUST BE REPEATED PRIOR TO ENERGIZATION AS PER APPROVED SCHEME.
TRIPPING OPERATION TO BE CHECKED FOR BOTH THE TRIP COILS FROM LOCAL/ REMOTE/ PROTECTION A DC SOURCE 1 OFF
SL. PROTECTION SIMULATION METHOD CB TRIP RESPONCE REMARK
NO TYPE MAIN TIE
I MAIN - I II MAIN - II
III OVER VOLTAGE IV CARRIER INTER
TRIPPING V LBB VI BUS BAR
VII TEE DIFFERENTIAL VIII DIFFERENTIAL
IX RESTRICTED EARTH FAULT
X BACK UP O/C & E/F XI OVERFLUXING XII OTI TRIP XIII WTI TRIP
XIV BUCHHOLZ TRIP (MAIN ) XV BUCHHOLZ TRIP (OLTC) XVI PRD
XVII AUTO-RECLOSE - R Ø XVIII AUTO-RECLOSE - Y Ø XIX AUTO-RECLOSE - B Ø
B DC SOURCE 2 OFF
SL. PROTECTION SIMULATION METHOD CB TRIP RESPONCE REMARK
NO TYPE MAIN TIE
I MAIN - I II MAIN - II
III OVER VOLTAGE IV CARRIER INTER
TRIPPING V LBB VI BUS BAR
VII TEE DIFFERENTIAL VIII DIFFERENTIAL
IX RESTRICTED EARTH FAULT
X BACK UP O/C & E/F
SL. PROTECTION SIMULATION METHOD CB TRIP RESPONCE REMARK
NO TYPE MAIN TIE
XI OVERFLUXING XII OTI TRIP XIII WTI TRIP
XIV BUCHHOLZ TRIP (MAIN ) XV BUCHHOLZ TRIP (OLTC) XVI PRD
XVII AUTO-RECLOSE - R Ø XVIII AUTO-RECLOSE - Y Ø XIX AUTO-RECLOSE - B Ø
OPERATIONAL CONSTRAINTS IF ANY 1
2 3 4 5
XIX FINAL DOCUMENTATION REVIEW :
A FINAL DOCUMENT OF PRE-COMMISSIONING CHECKS
REVIEWED AND APPROVED YES NO
B DOCUMENTS REGARDING SPARES,EQUIPMENT, O & M
MANNUALS ETC AVAILABLE AT SITE FOR O & M YES NO
PURPOSE
C AFTER MODIFICATION, IF ANY, "AS BUILT DRAWINGS"
ARE AVAILABLE AT SITE YES NO
D THE ABOVE BAY / FEEDER IS CLEARED FOR HIGH
VOLTAGE ENERGIZATION YES NO
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)
I REGION :
II DATE OF III DATE OF
ERECTION : ENERGISATION :
IV DETAILS OF EQUIPMENT :
LOA NO :
MAKE : TYPE :
SL NO. : R - PHASE : Y - PHASE : B - PHASE : YEAR OF
MANUFACTURE : FEEDER NAME :
V RATING :
VOLTAGE RATING :
VI DETAILS : CHECKLIST / TESTING
SL. DESCRIPTION STATUS
NO YES NO
1 EQUIPMENT IS FREE FROM DIRT / DUST FOREIGN MATERIALS ETC.
2 EQUIPMENT IS FREE FROM ALL VISIBLE DEFECTS ON PHYSICAL INSPECTION 3
4 ALL NUTS AND BOLTS ARE TIGHTENED CORRECTLY AS PER SPECIFIED TORQUE 5 EQUPIMENT ERECTION IS COMPLETE IN
ALL RESPECT
(ATTACH REMAINING ACTIVITIES,IF ANY) 6 PERMANENT LA LAVELLING AND
IDENTIFICATION IS DONE
REMARK RECORD DEFICIENCIES, IF ANY
SUPPORT STRUCTURES HAVE BEEN PROVIDED WITH DOUBLE EARTH
SL. DESCRIPTION STATUS
NO YES NO
7 LEVELLING AND ALIGNMENT OF STRUCTURE AND BASE FRAME IS CHECKED
8 ALL INSULATORS & SURGE COUNTER ARE FREE FROM ANY PHYSICAL DEFECTS 9 TIGHTNESS OF NUTS BOLTS OF TERMINAL
CONNECTORS ARE CHECKED
10 ERECTION COMPLETION CERTIFICATE ALONG WITH LIST OF OUTSTANDING ACTIVITIES REVIEWED
11 CHECK ONE END OF SURGE COUNTER IS
CONNECTED TO THE BOTTOM OF LA STACK AND ONE END OF SURGE COUNTER HAS BEEN EART 12 THE DIRECTION OF THE EXHAUST VENT PORTS AWAY FROM THE PROTECTED EQUIPMENT AND OTHER ARRESTER POLES
13 CREARANCE 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 DRAWING ISSUED BY ENGG. DEPT.
14
15
16 17
VII INSULATION RESISTANCE MEASUREMENT : ( USING 5KV MEGGER)
SL. NO BETWEEN PHASE MIN VALUE > 1000 M OHMS R-PHASE Y-PHASE B-PHASE
1 1ST STACK & EARTH MOHM
2 2ND STACK & EARTH MOHM
3 3RD STACK & EARTH MOHM
4 4TH STACK & EARTH MOHM
5 5TH STACK & EARTH MOHM
6 6TH STACK & EARTH MOHM
OPERATION OF LA COUNTER CHECKED BY APPLYING APPROPRIATE VOLTAGE
CHECK THE SERIAL NO. AND SEQUENCE OF LA PARTS FOR ERECTION IN MULTI STACK LA
RECORD DEFICIENCIES, IF ANY REMARK
CHECK THE ALIGNMENT OF CORONA RING
CHECK ON CHARGING, THE SURGE COUNTER POINTER IS IN GREEN ZONE
VIII SURGE COUNTER READING
SL. NO READING PHASE
R-PHASE Y-PHASE B-PHASE 1 COUNTER SR. NO.
2 COUNTER MAKE 3 COUNTER READING IX CAPACITANCE & TAN DELTA MEASUREMENT
X CHECKING OF HEALTHINESS OF SURGE MONITOR : OK
REFER MANUFACTURER'S CATALOGUE FOR DETAIL CHECKING OF SURGE MONITOR XI THIRD HARMONIC RESISTIVE CURRENT MEASUREMENT
AMBIENT TEMPERATURE :
SYSTEM VOLTAGE :
PH TOTAL
CURRENT R
Y B
XII
A FINAL DOCUMENT OF PRE-COMMISSIONING CHECKS
A FINAL DOCUMENT OF PRE-COMMISSIONING CHECKS