Yes No
Yes No
PRE-COMMISSIONING FORMATS
I. GENERAL DETAILS
DETAILS
Region: Sub-Station:
Feeder name LOA No. :
Make: Type:
Sr. No.: RØ:- YØ:- BØ:-
Voltage rating
Rating: Feeder name:
Year of Manufacture: R Ø:-
YØ:- BØ:-
Date of Receipt at site: RØ:-
YØ:- BØ:- Date of Erection:
R Ø:- YØ:-
BØ:-Date of energisation
II. PRE-COMMISSIONING CHECKS:
SL.
NO. DESCRIPTION STATUS REMARK RECORD
DEFICIENCIES, IF ANY YES NO
1 Equipment is free from dirt / dust foreign materials etc.
2 Equipment is free from all visible defects on physical inspection 3 Support structures have been provided with double earth
4 All nuts and bolts are tightened correctly as per specified torque
5
Equipment erection is complete in all respect (attach remaining
activities, if any)
6 Permanent LA leveling and identification is done
7 Leveling 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 earthed
12
The direction of the exhaust vent ports away from the protected equipment and other arrester poles
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. Dept.
14 Operation of LA counter checked by applying appropriate voltage
15
Check the serial no. and sequence of LA parts for erection in multi
stack LA
16 Check the alignment of corona ring
17 Check on charging, the surge counter pointer is in green zone
FOR SURGE ARRESTER
VIII.
i. Resistance of operating coil _______________________________
ii. Resistance of interlocking coil________________________________
IX. FINAL DOCUMENTATION REVIEW
i. Final documents of Pre- Commissioning checks reviewed and approved
ii. Document regarding spares equipment, O&M manuals etc available at sit for O&M purpose
iii. After modification, if any, “As built Drawings” are available at site
Signature:
Name:
Designation:
Organization:
(Supplier Representative) (Wherever Applicable)
Signature:
Name:
Designation:
(Erection Agency)
Signature:
Name:
Designation:
(POWERGRID Site I/C)
Signature:
Name:
Designation:
(POWERGRID Commissioning Team) Members:
Yes No
Yes No
Yes No
PRE-COMMISSIONING FORMATS
I. GENERAL DETAILS
DETAILS
Region: Sub-Station:
Feeder name LOA No. :
Make: Type:
Sr. No.:
RØ:- YØ:- BØ:-
Voltage rating
Rating: Feeder name:
Year of Manufacture:
R Ø:- YØ:- BØ:-
Date of Receipt at site:
RØ:- YØ:- BØ:- Date of Erection:
R Ø:- YØ:-
BØ:-Date of energisation
II. PRE-COMMISSIONING CHECKS:
SL.
NO. DESCRIPTION STATUS REMARK RECORD
DEFICIENCIES, IF ANY YES NO
1 Equipment is free from dirt / dust foreign materials etc.
2 Equipment is free from all visible defects on physical inspection 3 Support structures have been provided with double earth
4 All nuts and bolts are tightened correctly as per specified torque
5
Equipment erection is complete in all respect (attach remaining
activities, if any)
6 Permanent LA leveling and identification is done
7 Leveling 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 earthed
12
The direction of the exhaust vent ports away from the protected equipment and other arrester poles
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. Dept.
14 Operation of LA counter checked by applying appropriate voltage
15
Check the serial no. and sequence of LA parts for erection in multi
stack LA
16 Check the alignment of corona ring
17 Check on charging, the surge counter pointer is in green zone
FOR SURGE ARRESTER
III. INSULATION RESISTANCE MEASUREMENT : ( USING 5kV MEGGER)
SL. NO BETWEEN
UNIT
PHASE
R Ø Y Ø B Ø
1 1st stack & earth M?
2 2nd stack & earth M?
3 3rd stack & earth M?
4 4th stack & earth M?
5 5th stack & earth M?
6 6th stack & earth M?
MIN VALUE > 1000 M OHMS
IV. SURGE COUNTER READING
SL.NO READING R Ø YØ BØ
1 Counter sr. No.
2 Counter make
3
V. CAPACITANCE & TAN DELTA MEASUREMENT
STACK CAPACITANCE TAN DELTA
REMARKS SITE FACTORY %DEVIATION SITE FACTORY %DEVIATION
Top
Middle 1
Middle 2
Bottom
Permissible Limits Tan ä 0.007 (max.) and Rate of rise in Tan Delta 0.001 per year (max) Deviation of Capacitance value from factory value should be within ± 5% of the rated value
Since temperature correction factor for Tan-Delta depe nds 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.
In case of violation of Tan-Delta the test results with temperature are to be referred to CC/OS
VI. CHECKING OF HEALTHINESS OF SURGE MONITOR
Refer manufacturer’s catalogue for detail checking of surge monitor
VII. THIRD HARMONIC RESISTIVE CURRENT MEASUREMENT
AMBIENT TEMPERATURE __________ ___________________ SYSTEM VOLTAGE____________________________
PH TOTAL
CURRENT
3RD HARMONIC RESISTIVE
CURRENT (I3 R) in A REMARKS
R
Y
B
Yes No
1
2
Counter reading
The value of third harmonic current after compensation shall be less than 30 µa. In case of discrepancy, test results to be forwarded to CC/OS.
I. FINAL DOCUMENTATION REVIEW
i. Final documents of Pre- Commissioning checks reviewed and approved
ii. Document regarding spares equipment, O&M manuals etc available at site for O&M purpose
iii. After modification, if any, “As built Drawings” are available at site
Signature: Name: Designation: Organization: (Supplier Representative) (Wherever Applicable)
Signature: Name: Designation: (Erection Agency)
Signature: Name: Designation: (POWERGRID Site I/C)
Signature: Name: Designation: (POWERGRID Commissioning Team) Members:
Yes No
Yes No
Yes No
III. INSULATION RESISTANCE MEASUREMENT : ( USING 5kV MEGGER)
SL. NO BETWEEN
UNIT
PHASE
R Ø Y Ø B Ø
1 1st stack & earth M?
2 2nd stack & earth M?
3 3rd stack & earth M?
4 4th stack & earth M?
5 5th stack & earth M?
6 6th stack & earth M?
MIN VALUE > 1000 M OHMS
IV. SURGE COUNTER READING
SL.NO READING R Ø YØ BØ
1 Counter sr. No.
2 Counter make
3
V. CAPACITANCE & TAN DELTA MEASUREMENT
STACK CAPACITANCE TAN DELTA
REMARKS SITE FACTORY %DEVIATION SITE FACTORY %DEVIATION
Top
Middle 1
Middle 2
Bottom
Permissible Limits Tan ä 0.007 (max.) and Rate of rise in Tan Delta 0.001 per year (max) Deviation of Capacitance value from factory value should be within ± 5% of the rated value
Since temperature correction factor for Tan-Delta depe nds 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.
In case of violation of Tan-Delta the test results with temperature are to be referred to CC/OS
VI. CHECKING OF HEALTHINESS OF SURGE MONITOR
Refer manufacturer’s catalogue for detail checking of surge monitor
VII. THIRD HARMONIC RESISTIVE CURRENT MEASUREMENT
AMBIENT TEMPERATURE __________ ___________________ SYSTEM VOLTAGE____________________________
PH TOTAL
CURRENT
3RD HARMONIC RESISTIVE
CURRENT (I3 R) in A REMARKS
R
Y
B
Yes No
1
2
Counter reading
The value of third harmonic current after compensation shall be less than 30 µa. In case of discrepancy, test results to be forwarded to CC/OS.
I. FINAL DOCUMENTATION REVIEW
i. Final documents of Pre- Commissioning checks reviewed and approved
ii. Document regarding spares equipment, O&M manuals etc available at site for O&M purpose
iii. After modification, if any, “As built Drawings” are available at site
Signature:
Name:
Designation:
Organization:
(Supplier Representative) (Wherever Applicable)
Signature:
Name:
Designation:
(Erection Agency)
Signature:
Name:
Designation:
(POWERGRID Site I/C)
Signature:
Name:
Designation:
(POWERGRID Commissioning Team) Members:
Yes No
Yes No
Yes No
PRE-COMMISSIONING FORMATS
mH Rating: Current Rating:
Band Width:
BØ:-Date of energisation
II. PRE-COMMISSIONING CHECKS
3 Support structures has been provided with double earth
4 All nuts and bolts are tightened correctly as per specified torque
5 Permanent lavelling and identification is done
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