switch yard ntpc anta
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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
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