ZN63(VS1)-12 China Vacuum Circuit Breaker

The ZN63 (VS1) -12 fixed sealed indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor switchgear with a rated voltage of 12kV. It can be used for control and protection of industrial and mining enterprises, power plants, substations, electrical facilities, and is suitable for frequent operation in places

Product Profile

◆ General

ZN63(VS1)indoor high-voltage alternating-current vacuum circuit breaker has a frequency of 50Hz and a rated voltage of 12kV.It applies tothe electical equipment control and protection in industrial and mining enterpises,power plants and substations,pariculanty to the places needingfrequent operation.It can be fixed in a switch cabinet or installed on a handcart.

With stable performance and convenient installation,it is the best choice for the control and protection of high-voltage power transmission

and distribution systems.

◆ Product standards

ZN63(VS1)indoor high-voltage alternating-current vacuum circuit breaker is produced in line with the following standards and codes.

●IEC 62271-100 High-voltage alternating-current circuit-breakers

●GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards

●GB 1984 High-voltage alternating-current circuit-breakers

● GB 311.1 Insulation co-ordination for high voltage transmission and distribution equipment

◆ Operating conditions

Normal operating conditions

●Ambient temperature:-40℃~+40℃ (below 35℃ within 24 hours)

● Relative humidity:≤95%(daily average)or ≤90%(monthly average)


◆ Technical parameters

1.1 Technical parameters

    ItemUnitReference value
    Rated voltagekV12
Power frequency voltage(when losing a circuit)kVBreaker 42
    Rated insulation level            Impulse withstand voltag(when losing a circuit)kVBreaker 75
    Rated frequencyHz50/60
    Rated currentA630/1250/1600/2000/2500/3150/4000
    Rated short-circuit breaking currentkA20,25,31.5,40
    Rated short-circuic making current (peak valuekA50,63.80,100
    Rated short-time withstand currentkA20,25,31.5,40
    Rated withstand current (peak value)kA506,380,100 
    Required operation sequence0-0.3s-CO-180s-CO
    Rated short-circuit durationS4
    Times of making-breaking with the rated short-circuit currentTimes30
    Mechanical lifeTimes10000

1.2 Mechanical parameters

   itemUnitReference value
   Gap of contactsmm11±1
   Contact overtravemm3.5±0.5
   Average making speedmvs0.6±0.2
   Average breaking speedm/s1.1±0.2
   Bounce time in contact makingms≤2
   Non-synchronous making/breaking of contactms≤2≤3(40kA
   Resistance of the circuit of each phaseμ Q≤80
   Permissible total wear thickness of the moving/fixed contactmm3

◆ Overall and Installation dimension

Overall dimension of VS1-12(wheeled)indoor high-voltage alternating-current vacuum circuit breaker(cabinet width:800mm)

VS1-12 Vacuum Circuit Breaker 01

Overall dimension of VS1-12(fixed)indoor high-voltage alternating-current vacuum circuit breaker(cabinet width:800mm)

Vacuum Circuit Breaker 02


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