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VS1(ZN63A)-12 Side-Mounted Indoor Vacuum Circuit Breaker
VS1(ZN63A)-12 Side-Mounted Indoor Vacuum Circuit Breaker

VS1(ZN63A)-10kV(12kV) Side-Mounted Indoor Vacuum Circuit Breaker

VS1(ZN63A)-10kV(12kV) Side-Mounted Indoor Medium-voltage Vacuum Circuit Breaker, is designed for indoor switching equipment in 3-10kV AC 50Hz power systems. It serves as a protection and control unit for grid equipment and power devices in industrial and mining enterprises. Due to its advantages, this vacuum circuit breaker is especially suitable for locations requiring frequent operations under rated working current or multiple interruptions of short-circuit current. The VS1 model indoor medium-voltage vacuum circuit breaker features two types of operating mechanisms: a spring mechanism and a permanent magnet mechanism. It can be used as a fixed installation unit or paired with a specialized propulsion mechanism to form a handcart unit.

Feature
1

This vacuum circuit breaker is intended for indoor switching equipment in 10kV(12kV) power systems, serving as a protection and control unit for grid equipment and power devices in industrial and mining enterprises.

2

Suitable for applications requiring frequent operations at rated working current or multiple interruptions of short-circuit current.

3

The operating mechanism includes both spring and permanent magnet options, allowing it to function as a fixed installation unit or to be paired with a dedicated propulsion mechanism to create a truck unit.

Parameter

Tech. parameters

Unit

Data

20KA

25KA 

31.5KA

40KA

Rated voltage

KV

12

Maximum working voltage

KV

12

Rated current

A

630-1250

630-1250

630-2000

1250-4000

Rated short circuit breaking current

KA

20

25

31.5

40

Rated short circuit making current

KA

50

63

80

100

Rated peak withstand current

KA

50

63

80

100

4S rated short circuit withstand current

KA

20

25

31.5

100

Rated insulation level

Power-frequency withstand voltage (rated before and after breaking)

KV

42(fracture 48)

Lightning impulse withstand voltage (rated before and after breaking)

75(fracture 84)

Rated operating sequence

Break-0.3s-Make and break-180s-Make and break

Mechanical life

Times

20000

Rated short circuit breaking current breaking times

Times

50

Rated making voltage of operating machinery (DC)

V

AC/DC 110/220

Rated breaking voltage of operating machinery (DC)

V

AC/DC 110/220

Clearance between open contacts

mm

11±1

Overtravel (contact spring compression length)

mm

3.5±0.5

Breaking and making asynchronism of three different phases

ms

≤2

Contact closing bounce time

ms

≤2

Average opening speed

m/s

0.9-1.2

Average closing speed

m/s

0.5-0.8

Breaking time

ms

20-60

Making time

ms

≤70

Main circuit resistance of each phase

(μΩ)

630≤50  1250≤45

1600-2500≤40

3150≤35

Allowable cumulative wear thickness of dynamic and static contacts

mm

30


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VS1(ZN63A)-12 Side-Mounted Indoor Vacuum Circuit Breaker
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