28 Circuit Breaker

7/27/2019 28 Circuit Breaker

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DOC NO.: D-2-01-03-01-03

PRE-COMMISSIONING FORMATS FOR CIRCUIT BREAKER

I. GENERAL DETAILS

DETAILS

Region: Eastern Sub-Station: 400/220kV

Feeder Name:425 52 CB

LOA No. :

Make:Areva T&D india Ltd

Year of Manufacture:2010

Sr. No.: 160418 Type:GL316

Rating:3150A Rated Breaking Capacity(kA): 50

Operating Voltage: 420KV Control Voltage (DC) :220V

Date of Receipt at site: Date of Erection:

Date of energisation:

II. PRE-COMMISSIONING CHECKS:

SL

.NO DESCRIPTION

STATUS

REMARKSYES NO

1 Equipment is free from dirt/dust foreign materials etc.YES

2 Equipment is free from all visible defects on physical inspection YES

3Support structures, marshalling box has been provided with doubleearth

YES

4 All nuts and bolts are tightened correctly as per specified torque YES

5

Equipment erection is complete in all respect & erection completioncertificate along with list of outstanding activities reviewed

(attach remaining activities, if any)

YES

6 Permanent pole leveling and identification is done YES

7 Leveling and alignment of structure and base frame is checkedYES

8 Control box / marshalling kiosk is free from any physical defectsYES

9 Tightness of nuts bolts of terminal connectors are checkedYES

10

Auxiliary contacts and relays have been cleaned and free

from rust / damage

YES

11

All spare wires to be kept with ferrules but not terminated

at the terminal blocks

YES

12

Check all the valves in the sf6 pipe line are tightened,

DILO coupling are tightened.

YES

13Slow and power closing operation and opening done (whereverapplicable)

YES

Format No.: No. CF/CB/03/ R-3 DATED 01/04/2011 Circuit Breaker

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III. OPERATING SYSTEM

Closing Opening

Hydraulic Hydraulic

Pneumatic Pneumatic

Spring yes Spring YesOthers Others

i. Hydraulic system

a) Accumulator

b) Pump details

c) Details of relays/contactors used

Schematic drawing no______________________

CIRCUIT REFERENCE MAKE SERIAL NO. TYPE NO+NC

Oil Pressure Monitor NA NA NA NA

Closing Lockout NA NA NA NA

Auto Reclosing Lockout NA NA NA NA

General Lockout NA NA NA NA

Anti Pumping ContactorNA NA NA NA

Pole Discrepancy Timer NA NA NA NA

Auxiliary NA NA NA NA


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R Y B

Make NA NA NA

Serial number NA NA NA

Type NA NA NA

Year of manufacture NA NA NA

Make NA Volt NA

Serial number

NA

Amperes

NA

Type NA Hp/ kW NA

Year of manufacturer

NA O/L setting(Thermal Over

load)

NA


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Power Contactor NA NA NA NA

Others NA NA NA NA

d) Operation checks

Date of Hydraulic Oil filling_____________________

Type of Hydraulic Oil _____________________

1. Venting of Hydraulic system

SL .NO ITEM DESCRIPTIONSTATUS

REMARKSYES NO

Pump NA NA NA

Pilot Valve NA NA NA

Accumulator NA NA NA

Hydraulic Mechanism NA NA NA

2. Pressurising hydraulic system

SL.NO DESCRIPTIONFACTORY

TEST VALUESITE TEST

VALUE

REMARK RECORDDEFICIENCIES,IF

ANY

1 Pre-filling pressure of N2 in accumulator ( bar /deg. C)

NA NA

2 Pump running time for charging hydraulicsystem from initial pressure to working pressure

NA NA

3 Checking safety valve (open/close) NA NA

4 Hydraulic pressure drop for 1 hr NA NA

Breaker on position NA NA

Breaker off position NA NA

5 Oil pressure monitor NA NA

Pump on / off bar NA NA

Pump running time NA NA

6 Auto reclosing lockout (oil) Pressure contact

_____________ make/break

NA NA

7 Closing lockout (oil) pressure Contact__________make/break

NA NA

8 General lockout (oil) Pressure contact__________ make/break

NA NA

9 Checking anti pumping contactor Pressurecontact __________make/break

NA NA

10 Checking loss of nitrogen Pressure contact__________make/break

NA NA

Factory test report ref no: ________________________________

3. Oil pressure drop during operations and pump running time in seconds

SL.NO DESCRIPTIONFACTORY TEST

VALUESITE TEST VALUE

(i) Pressure before operation(Bar)NA NA

Pressure after closing operation(Bar)NA NA

Pump running time(Sec)NA NA

(ii) Pressure before operation(Bar)NA NA


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Pressure after opening operation(Bar)NA NA


(iii) Pressure before operation(Bar)NA NA

Pressure after close/open operation (Bar)NA NA

Pump running time in secNA NA

(iv) Pressure before operation(Bar) NA NA

Pressure after open-close-open operation(Bar)NA NA


Factory test report ref no: ________________________________ii. Pneumatic System

a) Operating system detailsR - Y - B Remarks

Air receiver no NA NA NA

Control block no NA NA NA

Pneumatic drive no NA NA NAMagnetic ventil no NA NA NA

b) Motor details

c) ICU Details

d) Details of Relays / Contactors used

Schematic drawing no______________________


Air Pressure Monitor NA NA NA NA

Closing Lockout NA NA NA NA

Auto Reclosing Lockout NA NA NA NA

General Lockout NA NA NA NA

Pole Discrepancy Timer NA NA NA NA

Auxiliary NA NA NA NA


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Make NA Volt NA

Serial number NA Amperes NA

Type NA Hp/ kW NA

Year of manufacturer NA O/L setting (Thermal Over load) NA

Make NA

Serial number NA

Type NA

Discharge NA

Capacity NA

Year of manufacturer NA


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Power Contactor in ICU NA NA NA NA

Others NA NA NA NA

e) Pressure Switch setting

CIRCUIT REFERENCE

FACTORY SETTING

VALUE

SITE SETTING VALUE

MAKE

REMARKS

BLOCK DEBLOCK BLOCK DEBLOCK

Operation lockout -1 NA NA NA NA NA

Operation lockout -2 NA NA NA NA NA

Closing lockout NA NA NA NA NA

Auto reclosing ckt NA NA NA NA NA

Low/high pressure NA NA NA NA NA

Alarm circuit NA NA NA NA NA

ICU auto setting NA NA NA NA NA

ICU safety valve NA NA NA NA NA

OperationsNA NA NA NA NA


f) Pressure drop during operation : ( in kg/ sq.cm -bar )

SL NO DESCRIPTIONFACTORY SETTING

VALUESITE SETTING

VALUE

A Tripping through TC-I NA NA

B Tripping through TC- II NA NA

C

Closing circuit

NA NA

D Close-open operation NA NA

E Open - close - open

NA NA


g) Number of operation from local

Tank pressure ___________ kg/sq.cm or bar

BREAKER INITIALLY CLOSE :

FACTORY TEST : O-C-

NA

PLEASE KEEP INLET PNEUMATIC VALVE

CLOSED IN THESE OPERATION

SITE TEST : O-C-

NA

BREAKER INITIALLY OPEN :

FACTORY TEST : C-O-

NA

PLEASE KEEP INLET PNEUMATIC VALVE

CLOSED IN THESE OPERATION

SITE TEST : C-O-

NA

h) Air pressure drop in 24 hrs

DROP IN PRESSURE IN

KG/SQ.CM OR BAR

BREAKERONNA

BREAKEROFFNA


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iii. SPRING OPERATING SYSTEMa) Motor details

MakeNA

VoltNA

Sl noNA

AmperesNA

TypeNA

Hp/kwNA

Year of ManufactureNA

Setting (thermal overload)NA

Dc current taken by motor for

charging the spring ( amp)

NA

b) Details of relays/contactors used : schematic drawing no

c) Spring operating time

DETAILS

R-PHASE Y-PHASE B-PHASE

FACTORY SITE FACTORY SITE FACTORY SITE


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Closing lockoutNA NA NA NA

Auto reclosing lockoutNA NA NA NA

General lockoutNA NA NA NA

Pole descrepancy timerNA NA NA NA

AuxillaryNA NA NA NA

Power contactorNA NA NA NA

OthersNA NA NA NA


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CHARGING TIME 3.5s 3.6s 4.25s 4.0s 3.6s 3.9s

Factory test report ref no

IV. SF6 DENSITY MONITOR DETAILS

i.

R-PHASE Y-PHASE B-PHASE

Make WIKAI WIKAI WIKAI

Model - - -

Sl.no 280HNYI 280HNYH 280HNY

Year of manufacture

Quantity of SF6 gas filled actual 7.8bar 7.8bar 7.8bar

As per Specification

ii . SF6 density monitor settings

PHASE

DETAILS

BLOCKING DEBLOCKING

FACTORY SITE FACTORY SITE

R PHASE REFILL ALARM OPERATION BLOCK 6.4 6.4 6.7 6.7

Y PHASE REFILL ALARM OPERATION BLOCK 6.4 6.4 6.7 6.7

B PHASE REFILL ALARM OPERATION BLOCK 6.4 6.4 6.7 6.7

Factory test report ref no :iii. Measurement of dew point of sf6 gas

SL. NOMEASURED

VALUE PERMISSIBLE LIMITS TO BE DECIDED AS PER GRAPH

Rph -38C

Yph -37C

Bph -38C


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

iv. Leakage check

SL.NO INTERVALS UNIT

A

Initial filling of sf6 gas at ____deg c

(As per temp. Correction chart ) BAR 7.8

B Drop in sf6 gas pressure in 24 hrs : BAR 7.8

C

Final sf6 pressure at __24______deg. C

After all testing BAR 7.8

D

Additional leakage test by covering

individual joint with polythene

YES NO

V. COIL RESISTANCE MEASUREMENT


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SL NO

PHASE

COILUNIT

MEASUREDVALUE

SERIESRESISTOR TOTAL

A R

TRIP COIL - I 145 NA 145

TRIP COIL - II 144 NA 144

CLOSE COIL 145 NA 145

BY




CB




VI. CIRCUITRY / OPERATIONAL CHECKS

SL NO CIRCUIT REFERENCECIRCUITARY CHECK OPERATIONAL CHECK

LOCAL REMOTE LOCAL REMOTE

A TRIPPING THROUGH TC-I OK OK OK OK

B TRIPPING THROUGH TC-II OK OK OK OK

C CLOSING CIRCUIT OK OK OK OK

D ANTI-HUNTING FEATUREOK

OK

OK

OK

OK

OK

OK

OK(CLOSE OPEN OPERATION )

E POLE DISCREPANCY FEATURE OK OK OK OK

F BREAKER POSITION INDICATION OK OK OK OK

G HEATER IN SWITCH CUBICLE OK OK OK OK

H HEATER IN CONTROL CUBICLE OK OK OK OK

I ILLUM. IN SWITCH CUBICLE OK OK OK OK

J ILLUM. IN CONTROL CUBICLE OK OK OK OK

Note: In case wiring for remote operation is not ready, please indicate terminal number along with wire ferrulenumber in switch cubicle where remote cables shall be terminated. Remote operation can be checked from these

terminals

VII. OPERATING TIME ( IN MILLI-SECONDS )

PHASE

BREAK

CLOSE(Max 150

ms)

T R I P (Max 25ms 400kV,35 ms

220kV, 40 ms 132kV)

CLOSE TRIP (Min. 35 ms)

TRIP - I TRIP - II TRIP I TRIP - II

R - ph main contactBREAK 1

106.3 22.6 22.5 50.3 50.5

R - PH PIR ( 12 4 ms)

Auxiliary contact 118.0 16.5 16.4 156.9 157.4

R - ph main contactBREAK 2

106.3 22.6 22.5 50.3 50.5

R - PH PIR ( 12 4 ms)


Y - ph main contactBREAK 1

106.1 21.8 21.8 48.5 49.5

Y - PH PIR ( 12 4 ms)


Y - ph main contactBREAK 2

106.1 21.7 21.8 48.5 49.5

Y - PH PIR ( 12 4 ms) Auxiliary contact 116.5 16.2 16.3 155.8 157.2


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B - ph main contactBREAK 1

104.9 21.5 21.5 49.0 48..9

B - PH PIR ( 12 4 ms)


B - ph main contact BREAK 2 104.9 21.5 21.5 49.0 48..9

B - PH PIR ( 12 4 ms)


NOTE: for 765 kV, take measurements for four breaks

VIII. IR VALUE OF CONTROL CIRCUIT(USING 500 VOLT MEGGER)

COIL DETAILSUNIT MEASUREMENT VALUE

R PHASE TRIP COIL - I M >1000

R PHASE TRIP COIL - IIM >1000

R PHASE CLOSE COILM >1000

Y PHASE TRIP COIL - IM

>1000Y PHASE TRIP COIL - II

M >1000

Y PHASE CLOSE COILM >1000

B PHASE TRIP COIL - IM >1000

B PHASE TRIP COIL - IIM >1000

B PHASE CLOSE COILM >1000

CAUTION: Isolate necessary dc for trip coil i and trip coil ii ,closing coil before meggaring .

MINIMUM VALUE 2 MOHM

IX. IR VALUE WITH BREAKER OPEN(USING 5000 VOLT MEGGER)

ACROSS OPEN CONTACT UNIT MEASUREMENT VALUE

R - PHASE BREAK 1G 436

R - PHASE BREAK-2G 486

Y - PHASE BREAK 1G 500

Y - PHASE BREAK-2G 550

B - PHASE BREAK 1G 475

B - PHASE BREAK-2G 450

MINIMUM VALUE 2 MOHMX. IR VALUE WITH RESPECT TO EARTH WITH BREAKER CLOSED, EARTH SWITCHAND ISOLATOR OPEN

BETWEEN UNIT MEASUREMENT VALUE

R PHASE AND EARTHG 436


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Y PHASE AND EARTHG 500

B PHASE AND EARTHG 450

XI. MINIMUM PICKUP VOLTAGE OF COILS

COIL DETAILSUNIT MEASUREMENT VALUE

R PHASE TRIP COIL - I V 109

R PHASE TRIP COIL - IIV 113

R PHASE CLOSE COILV 101

Y PHASE TRIP COIL - IV 105

Y PHASE TRIP COIL - IIV 103

Y PHASE CLOSE COILV 106

B PHASE TRIP COIL - IV 109

B PHASE TRIP COIL - IIV 108

B PHASE CLOSE COILV 103

XII. GRADING CAPACITOR - NAi. DETAILS

DETAILSINTERRUPTER 1 INTERRUPTER 2

R Y B R Y B

MAKE NA NA NA NA NA NA

SERIAL NO. NA NA NA NA NA NA

CAPACITANCE VALUE NA NA NA NA NA NA

FACTORY VALUE NA NA NA NA NA NA

YEAR OF MANUFAC. NA NA NA NA NA NA

ii. CAPACITANCE AND TAN DELTA MEASUREMENT (TO BE DONE IN UST MODE)

CAPACITANCEINTERRUPTER 1 INTERRUPTER 2

R Y B R Y B

SITE NA NA NA NA NA NA

-FACTORY NA NA NA NA NA NA

% DEVIATION NA NA NA NA NA NA

TAN DELTA NA NA NA NA NA NA

SITE NA NA NA NA NA NA

-FACTORY NA NA NA NA NA NA

% DEVIATION NA NA NA NA NA NA

Permissible Limits

a) Tan delta of grading capacitors 0.007 (max.)

b) Rate of rise in Tan Delta 0.001 per year (max)

c) Capacitance of grading capacitors within 5% of the rated value

Note:

a) Since temperature correction factor for Tan-Delta depends on make, type and also aging conditions, the correction

factors for different types / makes are different. Hence, no standard temperature correction factors can be applied.

b) In case of violation of Tan-Delta the test results with temperature are to be referred to CC/OS


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XIII. CONTACT RESISTANCE MEASUREMENTEqipment detail:- CRM 100 &Sr No:-2300.06X60Calib date 29/12/2011All Values In Micro-Ohm

SL.NO

PHASE

ACROSS EACH POLE ACROSS INTERRUPTR 1 ACROSS INTERRUPTR 2

FACTORY SITE FACTORY SITE FACTORY SITE

A R-PHASE 75.1 82 NA 38 NA 39

B Y-PHASE 73.5 81 NA 39 NA 40

C B-PHASE 73.8 80 NA 38 NA 40

a)Contact Resistance of CB (in Micro-Ohm)* 75 (Micro-Ohm) per breakb)Contact Resistance of CB terminal connector 10 Micro-Ohm per connectorFactory test report ref no :______________________

XIV. BREAKER OPERATION COUNTER READING

XV. CHECK FOR ANNUNCIATION IN CONTROL ROOM AS PER THE FOLLOWINGFORMATS AND RECORD THE READING

SLNO

DESCRIPTIONOF TEST

SOURCE OFINITIATION

WINDOW

DESCRIPTION

RESULT REMARKOK NOTOK

A

Switch off the dc switch in Control

cubicle

Control cubicledc

Switch on/off

Source I/II dc

fail / ac failB Switch off the ac Switch in control Control cubicle Source I/II dc


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400kV 220kV 132kV

150 * 100 100

COUNTER TYPE PUT MARK

ELECTRICAL

MECHANICAL

SL.NO PHASE READING DATE

A R-PHASE 183 04/12/12

B Y-PHASE 226 04/12/12

C B-PHASE 213 04/12/12


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Cubicle

ac

Switch on/off fail / ac fail

C

Short the alarm contacts of sf6 Gas

density monitor (R-phase) Density monitor

Sf6 gas density

low

D

Short the alarm contacts of sf6 Gas

density monitor (Y-phase) Density monitor

Sf6 gas density

low

EShort the alarm contacts of sf6 Gasdensity monitor (B-phase) Density monitor

Sf6 gas densitylow

F

Remove the cable connected to

density monitor (R-phase)

Density monitor

Operation/closi

ng lockout

G

Remove the cable connected todensity monitor (Y-phase)

Density monitor

Operation/closi

ng lockout

H

Remove the cable connected to

density monitor (B-phase)Density monitor

Operation/closing lock out

I

Give tripping command to R-ph only

and check the operation of polediscrepancy relay

Pole discrepancyrelay at breaker

Cubicle Breaker polediscrepancy

J

Give tripping command to Y-phOnly and check the operation of pole

discrepancy relay

Pole discrepancy

relay at breakerCubicle

Breaker polediscrepancy

K

Give tripping Command to B-ph onlyand check the

operation of polediscrepancy relay

polediscrepancy

relay at breakercubicle

Breaker polediscrepancy

L

Check other alarms as per plantCircuit diagram

M

Close the breaker and trip throughProtection which are applicable

protection relayas per scheme

Breaker autotrip

NOTE : The tripping details are to be checked as per the Scheme approved byengineering.

XVI. DYNAMIC CONTACT RESISTANCE & TRAVEL MEASUREMENT

PHASE FACTORY SITE REMARKSAPPROVAL FROM

CC/OS OBTAINED

R

Y

Enclosed

B

XVII. OPERATION TIME MEASUREMENT OF POLE DISCREPANCY RELAY

Close/Trip time pole discrepancy at ratedoperating pressure Permissible Limits

a) Phase to Phase (Max) - close operation5.0ms

b) Phase to Phase (Max) - open operation 3.33ms


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c) Break to Break (Max) of same pole 2.5 ms

Note- 2.5 Sec for CBs with Auto Reclose Function & 0.5 Sec for CBs without Auto Reclose Function.

XVIII. MECHANICAL CLOSE INTERLOCK CHECKED

(WHEREVER APPLICABLE)

XIX. FINAL DOCUMENTATION REVIEW

i. Factory test results are available

ii. Final documents of Pre- Commissioning checks reviewed and approved

iii. Document regarding spares equipment, O&M manuals etc available at sit

for O&M purpose

iv. After modification, if any, As built Drawings are available at site

v. CC-OS approved dcrm signatures available

Signature:

Name:

Designation:

Organization:(SupplierRepresentative)(WhereverApplicable)

Signature:

Name:

Designation:

(Erection Agency)

Signature:

Name:

Designation:

(POWERGRID SiteI/C)

Signature:

Name:

Designation:

(POWERGRIDCommissioning. Team)Members:1.2.

3.4.


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Yes No

Yes

Yes No

Yes

Yes No

Yes

Yes No

Yes

Yes No

Yes

Yes No

Yes


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