11 kv mv board

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Technical Data sheets

11kV MV Switch Board

Item Details / Description Unit Supplier data

1 11kV Switchboard Cubicle

Make ABB/AREVA/SIEMENSType VCB

Metal clad switchgear and control gear yes/no yes

Compartmented switchgear and control gear yes/no yes

- rated voltage kV 11

- operating voltage kV 11

Air insulated yes/no yes

Draw-out type yes/no yes

With automatic shutter ( for safety ) yes/no yes

Separate compartment for :

- circuit breaker yes/no yes

- busbars yes/no yes

- low voltage equipment yes/no yes- cable termination yes/no yes

Pressure relief covers / Flaps yes/no yes

Rear access necessary yes/no yes

Cable connection from bottom yes/no yes

Ample cabling space shall be provided for ease of

cable connection / Termination

yes/no yes

Lockable service position for circuit breaker yes/no yes

Lockable test position for circuit breaker yes/no yes

Lockable isolated position for circuit breaker yes/no yes

Circuit breaker floor mounted yes/no yes

Cable earthing by earthing switch yes/no no

Mechanical & Electrical safety interlocks for :- earthing switch yes/no no

- test position yes/no yes

- buscoupler & incomer * yes/no yes

Type of enclosure & degree of protection IP IP42

Thickness of sheet metal

a) load bearing members mm 2

b) Non load bearing members mm 2

Door arrangement ( enclose details ) During detailed Engg

Location of instruments & protection relays Metering chamber

above CB chamberMax.height of instruments & protection relays

from the round level

mm During detailed Engg

Overall dimension ( L x D x H ) & approx. weight mm / kg During detailed Engg

a) Double/Single bus board B/C

b) Double/Single bus board I/C

c) Single bus board O/G ( Trafo Feeder )

d) Single bus board O/G ( Motor Feeder )

GA drawings enclosed yes/no no

Space heaters with thermostat in all panels with

suitable interlocks

yes/no yes

DC source for each switchboard AH As per BOQ

2 Busbars

Busbar and T-off connections :

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- Copper yes/no Yes

- Aluminium yes/no No

- insulated yes/no No

- Min clearance between

a) Phase to Phase mm As per IECb) Phase to Ground mm As per IEC

- Busbar size

4000 A sq.mm

2000A sq.mm

1250A sq.mm

500A sq.mm

-Current density - for copper busbars A/sq.mm 1.2A/sq.mm

Maximum temperature rise at rated full load

currentabove site ambient temperature ( 48 deg C ) deg C 42 deg C

Ground bus

-material

-one sec rating of ground bus KA 403 Current Transformers

- Make

-Type ( cast resin , bar primary ) yes/no yes

-Service Indoor

-Secondary current A 1

-Transformation ratio as per SLD yes/no yes

-Rated burden VA 15

-Accuracy class

a)Metering 0.5

b)Protection 5P20

suitable CTs to be provided to take care of

additional burden due to KW transducers

yes/no yes

- Class of insulation

-Power frequency & Impulse withstand KV 28/75

- short time thermal rating for 1 sec KA min. 31.5

4 Voltage Transformers

- Make

-Type

-Service

-Transformation ratio as per SLD yes/no yes

-Rated burden (for line PT's) VA 100

-Accuracy class 1.0/3P

-Power frequency & Impulse withstand KV 28/75

-Whether withdrawable type yes/no yes

-HT & LT fuses provided yes/no yes

5 Relays

Solid state relays equivalent to mentioned in SLD

with profibus communication facility

Yes/noYes

6 Meters

Ammeter

-Make

-Type

-Size mmxmm 90 x 90

-Range

During detailed Engg

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-Reference standard

Voltmeter

-Make

-Type

-Size mmxmm 90 x 90-Range

-Reference standard

MW meter

-Make

-Type

-Size mmxmm 90 x 90

-Range

-Reference standard

KWH meter

-Make

-Type

-Size mmxmm 90 x 90

-Range-Reference standard

Power factor meter

-Make

-Type

-Size mmxmm During detailed Engg

-Range

-Reference standard

KW Transducer

-Make

-Type

-Size mmxmm During detailed Engg

-Range-Reference standard

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Item Details/Description Unit Supplier

General Make As per Make listType Vacuum

Rated voltage kV 11

Operating voltage kV 11

Frequency Hz 50

Rated short circuit breaking current KA 40kA

Rated short time current (1 sec) KA 40kA

Total interrupting time ( measured in cycles

from trip coil energisation ) cycles

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Circuit Breaker

measures

No-voltage release (control voltage) yes/no No Volt Coil shall be

considered for only HT

motor feeders.

Interlocks to :- prevent moving of C.B. in closed position yes/no yes

- allow closing of C.B. in defined position yes/no yes

Maintanence C.B. operation in racked-out/test/isolated

position yes/no yes

Additional Switching status indicator yes/no yesaccessories Operation counter yes/no yes

No. of auxiliary contacts

a) Normally closed nos. 6

b) Normally open nos. 6

c) Whether convertible type yes/no No

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General Location : Main Sub-station

& Load Sub-station

Feeder Totally enclosed metal clad cubicle yes/no yes

cubicle (separate technical data sheet)

rated current of busbars considering deration due

to site conditions- for Double bus I/C A Not applicable

- for Single bus I/C A As per SLD- rated voltage KV 11

- operating voltage KV 11

- short circuit capacity at operating voltage for 3 KA 40kA

Switchgear Circuit breaker yes/no yes

(separate technical data sheet)

for single bus I/C

- for Double bus I/C A Not applicable

- for Single bus I/C A As per SLD

Whether suitable for voltage and frequency

variations as iven in s ecifications

yes/no yes

Surge diverter Surge diverter with counter yes/no No

Earthing Earthing switch yes/no No

Protection , Current transformers qty. As per SLD

metering, Voltage transformers qty. As per SLD

& Indications

Protections: As per the spec

Indications: yes/no yes

( Enclose detailed list of indications provided )

Energy / PowerAmmeters with selector switch qty. 1

Metering Voltmeter with selector switch qty. 1

Power factor meter yes/no

kWh meter yes/no

kW - tranducer with isolated 4-20 mA yes/no No

Incoming Feeder

On MFM

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GeneralLocation : Crusher, RM, Kiln & Cement Mill

SubstationFeeders

: Single bus board



rated current (Contactor feeder) A Not Applicable

- rated voltage KV -- operating voltage KV -

short circuit capacity at operating voltage for 1

sec

KA -

Switchgear Contactor feeder with fuses yes/no VCB Offered


- rated current A As per the

requirement

- rated voltage KV 11


short circuit capacity at operating voltage for KA 40kAWhether suitable for voltage and frequency

variations as iven in s ecifications

yes/no yes

Earthing Earthing switch yes/no no

Protection, Current transformers, output side qty. As per SLD

metering, & Indicatio Protections: As per the spec

Indications: yes/no yes

( Enclose detailed list of indications including

transformer faults provided, Annunciator

be for transformer faults )

Ammeters with selector switch qty. 1

Energy / Power kWh-meter yes/no MFM

Metering Metering: - unbalanced load yes/no no

- accuracy class % -

kW-transmitter with 4-20 mA output yes/no applicable for

motor feeder

Transformer Feeder

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MakeABB/AREVA/SIEME

NS


Feed to : 11kV/MV motors

Feeders

: Single bus board



rated current (Contactor feeder) A Not Applicable

Derated current (Contactor feeder) A Not Applicablerated current (Breaker feeder) A As per Tender

Derated current (Breaker feeder) A As per Tender



- short circuit capacity at operating voltage for KA 40kA

Switchgear Contactor and VCB/SF6 Breakers VCB

(separate technical data sheet) yes/no yes

- rated current A As per Tender

- derated current at site conditions A As per Tender

- rated current A -

- derated current at site conditions A -

Whether suitable for voltage and frequency variations

as given in Specifications yes/no yes

Surge divert Surge diverter with counter yes/no without counter


Protection , Current transformers, output side qty. As per Requirement

metering, Current transformers for capacitor line current qty. As per Requirement

& Indications

Protections:

Motor protection (microprocessor based) yes/no As per Requirement

Trip circuit supervision yes/no As per Requirement

High speed lock out Relay yes/no As per Requirement

Antipumping protection yes/no As per Requirement

Others :

Indications: yes/no As per Requirement


Energy / Po Ammeters qty. 1

Metering Ammeters with selector switch Confirmed

( for capacitor line currents) qty. 1

MFM Yes/no Yes

Motor feeder

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Motor feeder

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Cubicle (separate technical data sheet)

rated current A As pe the requirement

Derated current A As pe the requirement



- short circuit capacity at operating voltage for KA 40

Switchgear Circuit breaker yes/no yes


- rated current A As pe the requirement

-derated current at site conditions A 2500

Whether suitable for voltage and frequency variations

as given in Specifications yes/no yes


Protection , Voltage transformers qty. 3

metering, ( one for each bus section)

& Indications

Protections: As per SLD

O/C (Low set & high set) yes/no yes

E/F (Low set & high set) yes/no yes

Under voltage Protection yes/no yes

Trip circuit supervision yes/no yes

DC fail protection yes/no yes

High speed lock out Relay yes/no yes

Others :Indications: yes/no yes


Energy/pow Voltmeters with selector switch qty. 1

metering

Buscoupler

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11 kv mv board

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