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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.

2.0

Data Sheet

Page 1 of 22Prepared by:Larsen & Toubro Limited, EPC Power, Baroda.

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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


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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


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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


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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


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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

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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



(Maximum)





1.8 Atmosphere

Dusty, tropical and corrosive as

generally found in hydrocarbon

industry



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2.3 No. of phases 3

2.4 System fault level 40 KA

2.5 System earthing Resistance earthed


AC 240 V

6%, 1-Phase 50 Hz.DC 220 V + 10%, -15%

3.0 Electrical data


(inside panel at design temp.)1250A





capacity





3.9 Provision for Earthing switch / truck Required

4.0 Miscellaneous







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4.5 Cable glands and lugs for cable termination Required


RAL 7032.


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


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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





Runs - Per Phase


12 Clearance in air

Phase to phase (min) Sufficient to withstand



IS/IEC



14 Busbar size


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( No. of flats x size of each flat)1x120x10 Al


( No. of flats x size of each flat)1 x80 x10 Al

15 Horizontal main busbar/ vertical busbar materialCopper & aluminium

as per BOM







B) Wave shape of impulse voltage 1.2/50 micro sec.



23 Safety features



provided on busbar.

Yes




provided.

No (As per Siemens


to travel the arc

through the B/B

chamber to reduce

damage in panel.)

d) Breaker service, test and draw-out position

provided.Yes


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Yes




Yes


24 Circuit Breaker

24.1 Type VCB

24.2 Make Siemens

24.3 Type designation 3 AH



24.6 Current rating (in free air) 1250 A

24.7

Current rating inside the panel at specified design

temperature Suitable to application








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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

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(Maximum)





1.8 AtmosphereDusty, tropical and corrosive asgenerally found in hydrocarbon

industry




2.3 No. of phases 3

2.4 System fault level 40 KA2.5 System earthing Resistance earthed


AC 240 V 6%, 1-Phase 50 Hz.

DC 220 V + 10%, -15%

3.0 Electrical data


(inside panel at design temp.)

630A





capacity



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4.0 Miscellaneous






4.5 Cable glands and lugs for cable termination Required


RAL 7032.


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


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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





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Runs - Per Phase


12 Clearance in air Sufficient to withstand



IS/IEC

Phase to phase (min)



14 Busbar size





15 Horizontal main busbar/ vertical busbar material

Copper & aluminium

as per BOM







B) Wave shape of impulse voltage 1.2/50 micro-sec.



23 Safety features



Yes


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provided on busbar.




provided.

No (As per Siemens


to travel the arc

through the B/B

chamber to reduce

damage in panel.)

d) Breaker service, test and draw-out position

provided.Yes



Yes




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



24.6 Current rating (in free air) 1250 A

24.7Current rating inside the panel at specified design

temperatureSuitable to application


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ds_6.6kv ht swgr

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