Technical specification for 11 KV Porcelain Clad Vacuum Circuit Breakers:

 Technical specification for 11 KV Porcelain Clad Vacuum Circuit Breakers:




Vacuum Porcelain Clad (Outdoor)

Rated voltage

11 kV

Rated current

630 / 1250 / 2000 Amps

Nominal (Max. ) Voltage

12 KV

Rated frequency

50 Hz

Basic Insulation level

75 / 95 kV peak


Lightning impulse: 1.2 micro sec.

Power frequency withstand voltage

28/35 KV rms for 1 Minute

Rated making capacity

33.2 / 50 / 62.5 kA peak

Rated short time current

12.5 / 20 / 25 kA for 3 sec.

Rated Breaking capacity

12.5 / 20 / 25 kA at 12 kV

Rated Auxiliary control voltage

24 / 110 / 220 V DC

Rated voltage of charging motor

220 / 230 V AC

Rated operating sequence

0-0.3 sec. CO-3 Min-CO

Overall Dimensions:

Height of the breaker (without structure)

2040 mm

Width of the breaker

1200 mm

Breadth of the breaker

500 mm

Total height of the breaker

3040 mm

(Including structure but excluding plinth height 400 mm)

Technical Clearances:

Distance between poles

300 mm (min)

Height of the bushing insulator

200 mm (min)

Creepage distance

300 mm (min)

Height of the live part

3000 mm (min)

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