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SWITCH YARD

No. of bays 12 (Including 1 for future)

Generator bays 4

Bhilwara line bays 2

Dausa line bays 2

Kota line bay 1

Spare bay 1

Bus caupler bay 1

Bus transfer section bay 1

Bus switching scheme Double main and transfer bus

Double main busACSR Moose conductor spaced 250 mm.

in square formation

Rated Current 1250 Amp

Fault Current 31.5 KA

Transfer bus

2 Moose Conductor used for transfer of one

feeder at a time through transfer bus

breaker spaced at 250 mm

Minimum clearance

Phase to Phase Clearance 2700 mm

Phase to Earth clearance 2300 mm

Ground clearance 2580 mm

Equipment bus height 6200 mm from plinth level

Section clearance 4500 mm

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LIST OF EQUIPMENTS

Circuit breaker SF6

Make ABB Germany-10 Nos ABB India- 1 No

Type ELF SL-5-2 and ELF SL-4-1

Rating 245/220 kv,2000 A

Breaking Capacity 40 kv

Insulation Level 1050 kv (Peak)

No. of Breaks per pole Two

Type of Operating Mechanism Closing : Spring, Opening : Hydraulic

Gas Pressure 7 Kg/cm

Closing time 70m Sec.

Opening time 20 m Sec.

Isolator (without E/S)

Make S & S Madras

No. of Provided 10

Type RC 300 Horizontal Centre Break, Tandem

Rating 245 kv, 1250 A

No. of Poles 3

Rated SC with stand Current 31.5 kA, 1 Sec.

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Isolator (With Single E/S)

Make S & S Madras

No. of Provided 10

Type RC 300 Horizontal Centre Break

Rating 245 kv, 1250 A

No. of Poles 3

Rated SC with stand Current 31.5 kA, 1 Sec.

Isolator (With Double E/S)

Make S & S Madras

No. of Provided 2000 A-2 Nos., 1250 A - 10 Nos

Type RC 300 Horizontal Centre Break

Rating 245 kv, 2000 A

No. of Poles 3

Rated SC with stand Current 31.5 kA, 1 Sec.

Current Transformer

Make ABB India

No. of Provided 30 Nos (1200-600/1A), 3 No (2000-1000/1)

Type TMBR

Rating 245 kv, 1245 A

No. of Cores 5

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CVTs

Make ABB India

No. of Provided 21

Type WP 245 N, Single Phase

Rating 245 kv

No. of Cores 3

Ratio 220/3 kv/110/3 V

Capacitance in pF-Primary 4868

Capacitance in pF-Intermediate 48400

Capacitance in pF-Effective 4400 + 10%, -5%

Lightening

Make WSI

No. of Provided 27

Type CPL-II, Heavy duty Station class

Rating 198 kv, 11 kA

Minimum discharge Capacity 5 kj/kv

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Bus Post Insulator

Make WSI Bangalore

Nos Provided 71

Type Solid Core 220 kv

Wave Trap

Make WSI

Nos Provided 6

Rating 0.5 mH, 1250 A, 220 kv

Contral & Relay Panel

Make ABB India

Nos. Provided 2

Bay Marshaling Kiosk

Make Saravana, Switchgear

Nos. Provided 11

Marshaling Cubical (CT/CVTs)

Make Saravana, Switchgear

Nos Provided 11 (CT), 7 (CVT)

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Batteries for PLCC System

Make Exide Ltd.

Type Lead acid Cell, 2 Volts/Cell

Rating 48V, 300 AH

Battery Charger (PLCC)

Make Chhabi

Nos. Provided 1 (Normal), 1 (Reserve)

PLCC Equipments & Panel

Make ABB India

Nos Provided 8

Disturbance Recorder (Provided on Dausa & Bhilwara Feeders

Make ABB India

Type Industic 65 C

Distance to Fault Locator (Provided on Dausa & Bhilwara Feeders)

Make ASEA

Type RANZA