Zhejiang Pingchao Electric Co.,Ltd

Circuit Breaker

12KV Boundary Vacuum Circuit Breaker

12KV Boundary Vacuum Circuit Breaker

The ZW20-12 outdoor vacuum circuit breaker with SF6 gas insulation, with rated voltage of 12kV and three-phase AC frequancy of 50Hz....
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ZW20F-12G outdoor high voltage vacuum circuit breaker

Summary
The ZW20-12 outdoor vacuum circuit breaker with SF6 gas insulation, with rated voltage of 12kV and three-phase AC frequancy of 50Hz. It is mainly used for breaking and closing current, overload current and short-circuit current of power system.The breaker, matched with controller, can meet the requirment of the automatic distribution system and fullfil function of traditional recloser effectively and reliably. The breaker adopts mature case type sealing structure, inside filled with SF6 Gas. Therefore, it has excellent sealing performance not to be affected by external environment.


Specifications

Item

Unit

Data

Rated voltage

kV

12

1 min p.f withstand voltage

kV

42

1 min p.f withstand voltage-wet(phase to   earth.outer insulate)

kV

34

Lightning impulse withstand voltage(peak)

kV

75

Rated current

A

630,1250

Rated power frequency

Hz

50/60

Rated short-circuit breaking current

kA

12.5,16,20

Rated operating sequence

O-0.3S-CO-180S-CO

Rated short-circuit breaking time

times

30

Rated short-circuit making current(peak)

kA

31.5,40,50

Rated withstand current(peak)

kA

31.5,40,50

Rated short-time withstand current(4s)

kA

12.5,16,20

Rated short-circuit duration

s

4

Mechanical life

times

10000

Rated operating voltage and rated voltage   of auxiliary loop

V

220

Rated current of over-current tripper

A

5

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