7/21/2019 DS_6.6kV HT SWGR
1/22
238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
2.0
Data Sheet
Page 1 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
Data Sheet for 6.6 KV Switchgear
(52-HT-0921)
Part - 1
1.0 Site Conditions
1.1 Maximum Ambient Temperature 46.6 Deg. C
1.2 Minimum Ambient temperature -0.7 Deg. C
1.3 Design Temp. 45 Deg. C
1.4 Relative Humidity88 % ( Nominal) , 95 %
(Maximum)
1.5 Rainfall750 mm ( Maximum annual)
218 mm ( Maximum 24 hrs)
1.6 Altitude above MSL +238 M (MSL)
1.7 Location Panipat
1.8 Atmosphere
Dusty, tropical and corrosive as
generally found in hydrocarbon
industry
2.0 Operating Conditions
2.1 Voltage 6.6 KV 6%
2.2 Frequency 50 Hz 3%
2.3 No. of phases 3
2.4 System fault level 40 KA
2.5 System earthing Resistance earthed
2.6 Auxiliary supply
AC 240 V 6%, 1-Phase 50 Hz.
DC 220 V + 10%, -15%
3.0 Electrical data
Page 2 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
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PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
3.1 Busbar current rating
(inside panel at design temp.)3000A
3.2 1 sec short circuit withstand capacity 40 KA
3.3 a) System breaking capacity 40 KA
b) % D.C Component As per IEC
3.4 System making capacity2.55 times system breaking
capacity
3.5 Type of C.B Vacuum
3.6 Duty cycle of breaker O-3 min-CO-3 min-CO
3.7 Suitability for capacitor switching Yes
3.8 Surge suppressor for motor feeder Yes
3.9 Provision for Earthing switch / truck Required
4.0 Miscellaneous
4.1 Interface with ECS Required
4.2 Incoming power entry Cable/ Bus duct
4.3 Cable entry Bottom
4.4Separate bolted removable gland plate for
cable terminationRequired
4.5 Cable glands and lugs for cable termination Not Included
4.6 Painting/ paint shadeEpoxy based/ shade
RAL 7032.
Part-2(To be filled by Vendor)
A Switchboards
Page 3 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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7/21/2019 DS_6.6kV HT SWGR
5/22
238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
Rear 800 mm
Above 800 mm
10 Shock loading on foundation 2500 kg/Panel
11Max size/no of cables that can be terminated
inside the panel1C x800 / 3C x 300
a) Without rear extension panel 2 Run / Phase
b) With rear extension panel 4 Runs /6 Runs / 8
Runs - Per Phase
c) Size of rear extension panel 400/800/1000 mm
12 Clearance in air
Phase to phase (min) Sufficient to withstand
1 min. pf and Impulse
voltage in line with
IS/IEC
Phase to earth (min)
13 Busbar current rating at design ambient temp 3000A
14 Busbar size
14.1Horizontal main busbar size
( No. of flats x size of each flat)3x160x10 Cu
14.2Vertical dropper size
( No. of flats x size of each flat)4 x 100 x10 Cu
15 Horizontal main busbar/ vertical busbar materialCopper & aluminium
as per BOM
16 Insulating material ( Bus bar supports etc) SIGB 10N /1000
17 Earth busbar size 10x40 mm2
18 Earth busbar material Copper
19 a) 1 min. power frequency withstand voltage (rms) 20 KV
b) Over voltage factor for PTs 1.9 for 30 sec
20 a) Impulse withstand voltage (peak) 60 KV
Page 5 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
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PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
B) Wave shape of impulse voltage 1.2/50 micro-sec.
21 1 sec short circuit withstand capacity 40 KA
22 Peak dynamic withstand capacity 110 KA
23 Safety features
a) Heat shrinkable sleeves, rated to withstand the
system line to line voltage for one minute,
provided on busbar.
Yes
b) Removable FRP shrouds for all busbar joints
and tap-off connections provided.Yes
c) Arc propagation barrier in busbar compartment
provided.
No (As per vendor
Philosophy, we allow
to travel the arc
through the B/B
chamber to reduce
damage in panel.)d) Breaker service, test and draw-out position
provided.Yes
e) Distinct overall lockable door for breaker
compartment provided.
Yes
f) Automatic safety shutter provided. Yes
g) Independent pressure release flaps provided for
all HV compartments.
Yes
h) Wire mesh for all louvered openings provided. Yes
24 Circuit Breaker
24.1 Type VCB
24.2 Make Siemens
24.3 Type designation 3 AH
24.4 Circuit breaker mounting in panel. Truck mounted
Page 6 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
24.5 No. of poles/phase 3
24.6 Current rating (in free air) 3150 A /1250 A
24.7Current rating inside the panel at specified design
temperatureSuitable to application
24.8 Short time rating (1 sec) 40 KA
24.9 a) Symmetrical breaking capacity 40 KA
b) % DC component 32%
24.10 Peak making current 100 KA
24.11 1 min dry withstand voltage (Power frequency) 28 KV
24.12 Duty cycle 0-0.3 sec-co-15 sec-co
24.13 Total opening time
7/21/2019 DS_6.6kV HT SWGR
8/22
238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
24.25.3 Re-filling arrangement for SF6 gas Not applicable
24.26 Surge Supressor Raychem / Equivalent
24.27 Derating required for capacitor switchingAs per
Specification
24.28 Earthing systemSeparate earthing
carriage
Data Sheet for 6.6 KV Switchgear
(52-HT-0922)
Part - 1
1.0 Site Conditions
1.1 Maximum Ambient Temperature 46.6 Deg. C
1.2 Minimum Ambient temperature -0.7 Deg. C
1.3 Design Temp. 45 Deg. C
1.4 Relative Humidity88 % ( Nominal) , 95 %
(Maximum)
1.5 Rainfall750 mm ( Maximum annual)
218 mm ( Maximum 24 hrs)
1.6 Altitude above MSL +238 M (MSL)
1.7 Location Panipat
1.8 Atmosphere
Dusty, tropical and corrosive as
generally found in hydrocarbon
industry
2.0 Operating Conditions
Page 8 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
7/21/2019 DS_6.6kV HT SWGR
9/22
238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
2.1 Voltage 6.6 KV 6%
2.2 Frequency 50 Hz 3%
2.3 No. of phases 3
2.4 System fault level 40 KA
2.5 System earthing Resistance earthed
2.6 Auxiliary supply
AC 240 V
6%, 1-Phase 50 Hz.DC 220 V + 10%, -15%
3.0 Electrical data
3.1 Busbar current rating
(inside panel at design temp.)1250A
3.2 1 sec short circuit withstand capacity 40 KA
3.3 a) System breaking capacity 40 KA
b) % D.C Component As per IEC
3.4 System making capacity2.55 times system breaking
capacity
3.5 Type of C.B Vacuum
3.6 Duty cycle of breaker O-3 min-CO-3 min-CO
3.7 Suitability for capacitor switching Yes
3.8 Surge suppressor for motor feeder Yes
3.9 Provision for Earthing switch / truck Required
4.0 Miscellaneous
4.1 Interface with ECS Required
4.2 Incoming power entry Cable/ Bus duct
4.3 Cable entry Bottom
4.4Separate bolted removable gland plate for
cable terminationRequired
Page 9 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
4.5 Cable glands and lugs for cable termination Required
4.6 Painting/ paint shadeEpoxy based/ shade
RAL 7032.
Part-2(To be filled by Vendor)
A Switchboards
1 Make Siemens
2 Type designation 8BK
3 Degree of protection IP4X
4 Max overall weight of C.B panel 750 Kg
5 Overall dimensions of C.B panel
Width 800 mm
Depth 2750 mm max
Height 2700 mm
6
Overall dimensions of dummy/ adaptor panel of
each type
Width 800 mm
Depth 1750 mm max
Height 2700 mm
7Overall weight and dimensions of largest shipping
section
Weight 1800 Kg
Page 10 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
Width 1600 mm
Depth 2750 mm max
Height 2700 mm
8
Overall dimensions of each switchboard including
all dummy/ adaptor/ rear extension
panels
Width 16000
Depth 2750 max
Height 2700
9 Recommended clearances for the switchboard
Front 1300 mm
Rear 800 mm
Above 800 mm
10 Shock loading on foundation 2500 Kg/Panel
11Max size/no of cables that can be terminated
inside the panel1C x800 / 3C x 300
a) Without rear extension panel 2 Run / Phase
b) With rear extension panel 4 Runs /6 Runs / 8
Runs - Per Phase
c) Size of rear extension panel 400/800/1000 mm
12 Clearance in air
Phase to phase (min) Sufficient to withstand
1 min. pf and Impulse
voltage in line with
IS/IEC
Phase to earth (min)
13 Busbar current rating at design ambient temp 1250A
14 Busbar size
Page 11 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
14.1Horizontal main busbar size
( No. of flats x size of each flat)1x120x10 Al
14.2Vertical dropper size
( No. of flats x size of each flat)1 x80 x10 Al
15 Horizontal main busbar/ vertical busbar materialCopper & aluminium
as per BOM
16 Insulating material ( Bus bar supports etc) SIGB 10N /1000
17 Earth busbar size 10x40 mm2
18 Earth busbar material Copper
19 a) 1 min. power frequency withstand voltage (rms) 28 KV
b) Over voltage factor for PTs 1.9 for 30 sec
20 a) Impulse withstand voltage (peak) 75 KV
B) Wave shape of impulse voltage 1.2/50 micro sec.
21 1 sec short circuit withstand capacity 40 KA
22 Peak dynamic withstand capacity 110 KA
23 Safety features
a) Heat shrinkable sleeves, rated to withstand the
system line to line voltage for one minute,
provided on busbar.
Yes
b) Removable FRP shrouds for all busbar joints
and tap-off connections provided.Yes
c) Arc propagation barrier in busbar compartment
provided.
No (As per Siemens
Philosophy, we allow
to travel the arc
through the B/B
chamber to reduce
damage in panel.)
d) Breaker service, test and draw-out position
provided.Yes
Page 12 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
e) Distinct overall lockable door for breaker
compartment provided.
Yes
f) Automatic safety shutter provided. Yes
g) Independent pressure release flaps provided for
all HV compartments.
Yes
h) Wire mesh for all louvered openings provided. Yes
24 Circuit Breaker
24.1 Type VCB
24.2 Make Siemens
24.3 Type designation 3 AH
24.4 Circuit breaker mounting in panel. Truck mounted
24.5 No. of poles/phase 3
24.6 Current rating (in free air) 1250 A
24.7
Current rating inside the panel at specified design
temperature Suitable to application
24.8 Short time rating (1 sec) 40 KA
24.9 a) Symmetrical breaking capacity 40 KA
b) % DC component 32%
24.10 Peak making current 100 KA
24.11 1 min dry withstand voltage (Power frequency) 28 KV
24.12 Duty cycle 0-0.3 sec-co-15 sec-co
24.13 Total opening time
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
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PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
24.19 Provision of manual spring charging provided Yes
24.20 Mechanical trip PB provided Yes
24.21 Mechanical ON/OFF indicator provided yes
24.22 Operation counter provided Yes
24.23 Time taken for spring charging
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
1.3 Design Temp. 45 Deg. C
1.4 Relative Humidity88 % ( Nominal) , 95 %
(Maximum)
1.5 Rainfall750 mm ( Maximum annual)
218 mm ( Maximum 24 hrs)
1.6 Altitude above MSL +238 M (MSL)
1.7 Location Panipat
1.8 AtmosphereDusty, tropical and corrosive asgenerally found in hydrocarbon
industry
2.0 Operating Conditions
2.1 Voltage 6.6 KV 6%
2.2 Frequency 50 Hz 3%
2.3 No. of phases 3
2.4 System fault level 40 KA2.5 System earthing Resistance earthed
2.6 Auxiliary supply
AC 240 V 6%, 1-Phase 50 Hz.
DC 220 V + 10%, -15%
3.0 Electrical data
3.1 Busbar current rating
(inside panel at design temp.)
630A
3.2 1 sec short circuit withstand capacity 40 KA
3.3 a) System breaking capacity 40 KA
b) % D.C Component As per IEC
3.4 System making capacity2.55 times system breaking
capacity
3.5 Type of C.B Vacuum
Page 15 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
3.6 Duty cycle of breaker O-3 min-CO-3 min-CO
3.7 Suitability for capacitor switching Yes
3.8 Surge suppressor for motor feeder Yes
4.0 Miscellaneous
4.1 Interface with ECS Required
4.2 Incoming power entry Cable/ Bus duct
4.3 Cable entry Bottom
4.4Separate bolted removable gland plate for
cable terminationRequired
4.5 Cable glands and lugs for cable termination Required
4.6 Painting/ paint shadeEpoxy based/ shade
RAL 7032.
Part-2(To be filled by Vendor)
A Switchboards
1 Make Siemens
2 Type designation 8BK
3 Degree of protection IP4X
4 Max overall weight of C.B panel 750 Kg
5 Overall dimensions of C.B panel
Width 800 mm
Page 16 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
Depth 2750 mm max
Height 2700 mm
6Overall dimensions of dummy/ adaptor panel of
each type
Width 800 mm
Depth 1750 mm max
Height 2700 mm
7Overall weight and dimensions of largest shipping
section
Weight 1800 Kg
Width 1800 mm
Depth 2750 mm max
Height 2700 mm
8
Overall dimensions of each switchboard including
all dummy/ adaptor/ rear extension
panels
Width 19200 mm
Depth 2750 max
Height 2700
9 Recommended clearances for the switchboard
Front 1300 mm
Rear 800 mm
Above 800 mm
10 Shock loading on foundation 2500 Kg/Panel
11Max size/no of cables that can be terminated
inside the panel1C x800 / 3C x 300
a) Without rear extension panel 2 Run / Phase
Page 17 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
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PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
b) With rear extension panel 4 Runs /6 Runs / 8
Runs - Per Phase
c) Size of rear extension panel 400/800/1000 mm
12 Clearance in air Sufficient to withstand
1 min. pf and Impulse
voltage in line with
IS/IEC
Phase to phase (min)
Phase to earth (min)
13 Busbar current rating at design ambient temp 630A
14 Busbar size
14.1Horizontal main busbar size
( No. of flats x size of each flat)1x100x10 Al
14.2Vertical dropper size
( No. of flats x size of each flat)1x80x10 Al
15 Horizontal main busbar/ vertical busbar material
Copper & aluminium
as per BOM
16 Insulating material ( Bus bar supports etc) SIGB 10N /1000
17 Earth busbar size 10x40 mm2
18 Earth busbar material Copper
19 a) 1 min. power frequency withstand voltage (rms) 28 KV
b) Over voltage factor for PTs 1.9 for 30 sec
20 a) Impulse withstand voltage (peak) 75 KV
B) Wave shape of impulse voltage 1.2/50 micro-sec.
21 1 sec short circuit withstand capacity 40 KA
22 Peak dynamic withstand capacity 110 KA
23 Safety features
a) Heat shrinkable sleeves, rated to withstand the
system line to line voltage for one minute,
Yes
Page 18 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
provided on busbar.
b) Removable FRP shrouds for all busbar joints
and tap-off connections provided.Yes
c) Arc propagation barrier in busbar compartment
provided.
No (As per Siemens
Philosophy, we allow
to travel the arc
through the B/B
chamber to reduce
damage in panel.)
d) Breaker service, test and draw-out position
provided.Yes
e) Distinct overall lockable door for breaker
compartment provided.
Yes
f) Automatic safety shutter provided. Yes
g) Independent pressure release flaps provided for
all HV compartments.
Yes
h) Wire mesh for all louvered openings provided. Yes
i) Suitable interlocks to prevent faulty operation as
per Cl 4.1.7 of standard spec 6-51-01
provided.
Refer deviationenclosed with the offer.
24 Circuit Breaker
24.1 Type VCB
24.2 Make Siemens24.3 Type designation 3 AH
24.4 Circuit breaker mounting in panel. Truck mounted
24.5 No. of poles/phase 3
24.6 Current rating (in free air) 1250 A
24.7Current rating inside the panel at specified design
temperatureSuitable to application
Page 19 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
0DATE
PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
24.8 Short time rating (1 sec) 40 KA
24.9 a) Symmetrical breaking capacity 40 KA
b) % DC component 32%
24.10 Peak making current 100 KA
24.11 1 min dry withstand voltage (Power frequency) 28 KV
24.12 Duty cycle 0-0.3 sec-co-15 sec-co
24.13 Total opening time
7/21/2019 DS_6.6kV HT SWGR
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238.5 MW CAPTIVE POWER PLANT
PANIPAT NAPHTHA CRACKER PROJECT
REV.NO
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PLANT OPERATION MANUAL
IOCL 6.6 KV SWITCHGEAR DOC. NO.
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