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ZW32-12MF series outdoor boundary vacuum circuit breaker

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Lead time: Sample is available in 2-3 working days;
The regular order will be usually 20-30 working days after receipt of 30% advance payment

Quality Guarantee: We offer 18 months’ warranty period, and 20 years’ quality guarantee period

Payment Terms: T/T, L/C, Western Union or Paypal

Trade term: FOB or CIF prices

We’re professional OEM manufacturer, and also accept the customized products according to the supplied drawings or parameters

Description
       ZW32-12MF series outdoor boundary Vacuum Circuit Breaker is the outdoor distribution equipment of rated voltage 12kV, three-phase AC 50/60HZ. This VCB is mainly used in load current, overload current and short circuit current of power distribution lines opening and closing of electric power system. 

      The application of circuit breaker outdoor intelligent boundary vacuum circuit breaker on 12kV feeder overhead line can avoid the power failure of the fault-free line, reduce the power failure range, shorten the power outage time, and protect the safe operation of the main network. It can also has fault detection function, to protect control and communication function, which can realize automatic cut-off single phase ground fault and auto.isolation phase to phase short fault. The installation point uses the responsibility boundary point for the user incoming line of the 12kV distribution line, and can also be applied to the branch line connection that meets the requirements.

Environment  condition

- Ambient temperature: max +40℃ min -40℃

- Altitude: ≤ 2000m

- Wind pressure: ≤ 700Pa (equals to wind speed 34m/s)

- Relative humidity: daily average relative humidity: ≤ 95%; monthly average relative humidity ≤ 90% - Air contamination degree: IV degree

- Earthquake intensity: ≤ 8 degree

- Not be contaminated by corrosive or flammable gas

- No frequent violent vibration or explosive place

Technical  Data

1Rated VoltageKV12
2Rated frequency HZ50
3Rated currentA630
4Rated short circuit breaking currentKA20, 25
5Rated peak withstand current (peak value)KA50, 63
6Rated short-time withstand currentKA20, 25
7Rated short circuit closing current (peak value)KA50, 63
8Mechanical lifeTimes10000
9Rated short circuit breaking current timesTimes30
10Power frequency withstand voltage(1min): (wet)(dry) same, earth / fractureKV42/48
11Lightning impulse withstand voltage (peak value) same, earth / fractureKV75/85
12Secondary circuit 1min power frequency withstand voltageKV2
13Rated operating voltage and rated voltage of auxiliary loopVAC220, 110 DC220, 110
14Rated current of over-current tripperA5
15Rated short-circuit durations4
16Contact open distance  mm9 ±1
17Contact Over-travelmm2.5±0.5
18Average opening speed  m/s1.1±0.2
19Average closing speed  m/s0.6±0.2
20Three-pole simultaneity          ms≤5
21Three-pole simultaneity (assembled with isolator)      ms≤2
22Distance of charged body and relative air  mm≤2
23Loop DC resistance per phases μΩ≤80
 (with isolator≤150)

Outline & Mounting Dimensions

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