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ZN63(VS1)-12KV 630A 1250A High /Medium-voltage indoor vacuum circuit breaker VCB Mechanism for switc

 
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Product Description

 ZN63-12 indoor high-voltage vacuum circuit breaker is an indoor switchgear of three-phase AC 50HZ power system with rated voltage of 12kV, which is used as the protection and control unit of power grid equipment and power equipment of industrial and mining enterprises. It is suitable for frequent operation under rated working current or places where short circuit current is broken for many times. The circuit breaker adopts an integrated design of operating mechanism and circuit breaker body, which can be used as a fixed installation unit or equipped with a special propulsion mechanism to form a handcart unit.

1.Ambient air temperature: upper limit+40 ℃, lower limit - 15 ℃;

2.Altitude: ≤ 1000m (if it is necessary to increase the altitude,the rated insulation level shall be increased accordingly)

3.Amplitude: seismic train degree shall not exceed 8 degrees;

4.The daily average value of air relative humidity shall not be greater than 95%, and the monthly average value shall not be greater than 90%
5.in places where there is no fire, danger, serious pollution, chemical corrosion and severe vibration.

Name

Unit

Parameter

Rated voltage

kV

12

12

12

12

Operating current

A

630、1250

630、1250、1600

1250、1600

2000、2500、3150

Rated insulation level

1min power frequency withstand voltage

kV

42

42

42

42

Lightning impulse voltage

kV

75

75

75

75

Rated short-circuit breaking current

kA

20

25

31.5

40

Rated short-circuit making current (peak value)

kA

50

63

80

100

Rated (peak) withstand current

kA

50

63

80

100

Rated short-time withstand current

kA

20

25

31.5

40

Rated short-circuit breaking current breaking times

50

50

50

30

Rated short circuit duration

s

4

Rated operating sequence


Opening - 0.3 s - closing opening - 180 s - closing opening
Opening - 180s - closing opening - 180s - closing opening (40kA)

Mechanical life

20000

20000

20000

20000

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