LA-Bay-1B

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TESTING & COMMISSIONING REPORT FOR

SWITCHYARD EQUIPMENTS &SWITHGEARS

PROCEDURE NO:T&C/T& C P/AIS-GIS/001Rev-3

PROJECT-765/400 KV UNNAO PROJECT

CLIENT-CROMPTON GREAVES LMITED

OWNERUTTAR PRDESH POWER TRANSMISSION

CORPORATION LIMITED

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EXECUTED BY-LARSEN & TOUBRO LIMITED-ECC DIVISIONPre Commissioning Tests For Lightning or Surge Arrester

Bay/Feeder No-801 1BEquipment Identification-LADate-2-2-2012

PRE COMMISSIONING TESTS FOR LIGHTNING ARRESTER OR SURGE ARRESTER

DETAILS OF EQUIPMENT:

LOA No. : EPU/RA/UPPTCL/CA-02

Make : XIAN XD ARRESTER CO LTD

Type: : METAL OXIDE SURGE ARRESTER

Sl. No. : R-Phase: 8830 Y-Phase: 8936 B-Phase: 8834

Year of manufacture: R-Phase: 2010 Y-Phase: 2010 B-Phase: 2010

Feeder Name : BAY-1B

Voltage Rating : 765kV

Post Installation check listS.

No.

Description Status Remarks, Record

discrepancies, if anyYes No

1. Equipment is cleaned and free from dust / dirt, foreign

materials etc.

Yes

2. Equipment is free from all visible defects on physical

inspection

Yes

3. Support structure and surge counter has been provided

with double earth

Yes

4. All nuts and bolts are tightened correctly as per specified

torque

Yes

5. Equipment erection is complete in all respect Yes

6. Permanent Labeling and identification is done Yes

7. Leveling and alignment of structure and base frame is

checked

Yes

8. All insulators and surge counter are free from any

physical defect

Yes

9. Tightness of nuts bolts of terminal connectors arechecked

Yes

10. Erection completion certificate along with list of

outstanding activities reviewed

Yes

11. Check one end of surge counter is connected to the

bottom of LA stack and one end of surge counter hasbeen earthed

Yes

12. The direction of the exhaust vent ports away from the

protected equipment and other arrester poles

Yes

13. 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

drawing issued by Engg. Deptt.

Yes

14. Serial number and sequence of LA parts for erection of

multi stack LA is checked

Yes

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CORPORATION LIMITED

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VOLTECH L&T CGL UPPTCL

15. Alignment of corona rings are checked

16. After charging, leakage current on the surge counter is

checked within safe limits

Yes

IR VALUE TEST

Insulation resistance measurement using 5 kV Megger: (min. >1000M )

Surge counter reading:

Sl. No. Reading Phase

R-Phase Y-Phase B-Phase

1. Counter Reading 1 to 3 3 to 5 1 to 3

CALIBRATION STATUS TABLETEST INSTRUMENT DETAILS:

Sl. No. Between PhaseR- Phase Y- Phase B-Phase

1 1st stack and Earth >1T >1T

2 2nd stack and Earth 173G 203G

3 3rd stack and Earth 298G 385G

4 4th stack and Earth 648G 417G

5 Support Insulator to

Earth

388G 239G

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CORPORATION LIMITED

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VOLTECH L&T CGL UPPTCL

Sl.no Instrument description Range Calibration status

1. LT MEGGER (Analog) 500 V DC 05/07/2012

2. HT MEGGER (Analog) (2.5-5.0) KV DC 06/07/2012

3. DIGITAL MULTIMETER (0-1000) V AC 16/05/2012

4. AC CURRENT LEAKAGE TESTER (0-100) A 17/06/2012

5. CONTACT RESISTANCE KIT 100 A 23/06/2012

6. DIGITAL HT MEGGER (0.5-5) KV DC 18/06/2012

7. DIGITAL CLAMPMETER (0-2000) A 20/06/2012

FINAL DOCUMENTATION REVIEW :

A. Final documents of Pre-Commissioning Checks Reviewed and Approved YES / NOB. Documents regarding Spares, Equipment ,O&M Manuals etc available YES / NO

at site for O&M purpose

C. After Modification, If Any, AS BUILT DRAWINGS are available at site YES / NO