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Mingde Electrical (Shanghai) Co., Ltd.

Circuit Breaker, Breaker, Vacuum Circuit Breaker manufacturer / supplier in China, offering 12kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker, 17.5kv -2500A Vmd Indoor Three Phase Vcb in Switchgear, Contact Box Md/150 and so on.

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Supplier Homepage Product Circuit Breaker 12kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker

12kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker

Purchase Qty.:
1-99 100+
FOB Unit Price: US $1,300 US $1,040
Purchase Qty. (Pieces) FOB Unit Price
1-99 US $1,300
100+ US $1,040
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Production Capacity: 22000PCS/Per Year Circuit Breaker
Transport Package: Wooden Case Circuit Breaker
Payment Terms: L/C, T/T, Western Union, Paypal

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Basic Info
  • Model NO.: VS1
  • Operation: Manual & Electric Circuit Breaker
  • Arc-extinguishing Medium: Vacuum
  • Structure: Vcb Circuit Breaker
  • Type: Circuit Breaker
  • Certification: ISO9001-2000, Ohsas 180001
  • Rated Current: 4000A Circuit Breaker
  • Rated Frequency: 50Hz Circuit Breaker
  • Specification: SGS, TUV
  • HS Code: 8535210000
  • Breaking Capacity: Middle& High Voltage Circuit Breaker
  • Speed: Normal Type Circuit Breaker
  • Installation: Fixed & Withdrawable Circuit Breaker
  • Poles Number: 3
  • Function: Overcurrent Protection
  • Rated Voltage: 12kv Circuit Breaker
  • Mechnical Life: 1000times Circuit Breaker
  • Trademark: Mingde Circuit Breaker
  • Origin: Zhejiang Ningbo Circuit Breaker
Product Description
12Kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker


1. VS1A series of vacuum circuit breakers are the Second Generation indoor switch equipment, with the rated voltage 7.2kv, 12kv, 17.5kv and 24kv.
2. VS1A series of vacuum circuit breakers adopt the integrated design of simple structure and convenient operation.
3. It is equipped with a perfect mechanical and electrical interlock to enhance its anti-incorrect operation performance.
4. Standards: IEC62271-100, IEC56, GB1984-2003, GB/T11022, DL/T403-2000, etc.

Main Specifications and Technical Parameters 

Rated voltagekV12
1 min power frequency withstand voltagekV42
Lightning impulse withstand voltagekV75
Rated frequencyHz50
Rated currentA4000A
Rated short-time withstand currentkA20,25,31.5,40
Rated peak withstand currentkA50,63,80,100
Rated short-circuit breaking currentkA20,25,31.5,40
Rated short-circuit closing currentkA50,63,80,100
Rated short-circuit durationS4
Contact over-travel mm3.5±0.5
Clearance between open contactsmm9±1/11±1
Average opening speedm/s1.1±0.2
Average closing speedm/s0.6±0.2
Opening time ms35-60
Closing timems20-45
Rated operation sequence O-0.3s-CO-180s-CO(<40kA)/
Mechanical lifecycles10000

12kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker
Normal Operating environment condition

a) Normal operating environment condition
Highest temperature:                  +40ºC
Lowest temperature:                   -15ºC
b) Environment humidity
Daily mean relative humidity:        ≤95%
Monthly mean relative humidity:     ≤90%
Daily mean saturated vapor pressure:   ≤2.2×10-3 MPa
Monthly mean saturated vapor pressure:  ≤1.8×10-3 MPa
c) Altitude: below 1000m area;
d) Earthquake intensity: no more than 8 degree;
e) The product shall be away from weep, fire and explosion, chemical corrosion and 
strenuous vibration place.

Special operating condition

Please consult with manufacturer on manufacturing technology when operating environment is the climatic environment with high altitude, high humidity and great temperature change or other special environment condition.

Packaging, transportation and storage precautions

(1) Circuit breaker should be in the state of opening and energy storage spring in a state without energy storage when packing. It should be in the state of opening and energy storage spring in a state without energy storage when packing. And it should be fixed on the bottom of the wooden case, should have waterproof measures and complete package labels.
(2) Circuit breakers can't invert and avoid strong vibration, rain, surface damage, and components lost when transportation.
(3) When loading the circuit breaker, we suggest the following tools: crane, forklift and driving. When lifting the circuit breaker, we should not hook on the body or pole of the circuit breaker, but on the lifting hole which has the lifting mark.
(4) When circuit breaker has a long-term storage, it should be in a state of opening and energy storage spring in a state without energy storage and placed in dry ventilated indoor preventing from moisture, vibration control and harmful gas erosion, and regularly checked whether environment meets the requirements.
(5)When first use products after long-term storage, it need to have a power frequency withstand voltage insulation testing.

12kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker
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12kv-4000A Vs1 DC Spring Operated Vacuum Circuit Breaker

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