Gold Member Since 2015
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Mingde Electrical (Shanghai) Co., Ltd.

Circuit Breaker, Breaker, Vacuum Circuit Breaker manufacturer / supplier in China, offering 12kv Indoor Withdrawable 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 Indoor Withdrawable Circuit Breaker

12kv Indoor Withdrawable 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
Get Latest Price
Production Capacity: 22000PCS/Year DC Circuit Breaker
Transport Package: Wooden Case Packing (900*900*1000mm)
Payment Terms: L/C, T/T, Western Union, Paypal

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Basic Info
  • Model NO.: VS1
  • Operation: Manual and Electric Type DC Circuit Breaker
  • Arc-extinguishing Medium: Vacuum
  • Structure: Vcb DC Circuit Breaker
  • Type: Circuit Breaker
  • Certification: ISO9001-2000, CCC, Ohsas 180001
  • Rated Frequency: 50Hz DC Circuit Breaker
  • Mechanical Life: 10000 Cycles DC Circuit Breaker
  • Specification: ISO9001/OHSAS/OHSMS 18001
  • HS Code: 8535210000
  • Breaking Capacity: High and Medium Voltage DC Circuit Breaker
  • Speed: Normal Type Circuit Breaker
  • Installation: Fixed and Handcart Type DC Circuit Breaker
  • Poles Number: 3
  • Function: Overcurrent Protection
  • Rated Voltage: 12kv DC Circuit Breaker
  • Rated Current: 630/1250/1600/2000/2500/3150/4000A DC Circuit Brea
  • Trademark: Mingde DC circuit breaker
  • Origin: Zhejiang, Ningbo DC Circuit Breaker
Product Description
12kV Indoor Withdrawable Circuit Breaker 

Product Overview

(ZN63A) series vacuum breaker is of indoor high voltage switchgear suitable for 12kV .Three-phase power system with 50Hz frequency in order to protect and control electrical appliances, and especially suitable for frequent operation at rated current or incessant open circuit due to unique advantages of vacuum circuit breaker.
Spring operating mechanism and breaker body parts adopt integration design. Thank for this design, breaker not only can be a fixed installation unit, but also can be a withdraw-able unit with a specially pushing framework. For meet the requirement of XGN2, GG1A cabinet, the fixed type breaker can be install additionally interlock.  

Main Technical Parameters

Rated voltagekV 
1 min power frequency withstand voltagekV42
Lightning impulse withstand voltagekV75
Rated frequencyHz50
Rated currentA630,1250,
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
External Dimensions
12kv Indoor Withdrawable Circuit Breaker
VS1A-7.2,12,17.5-pole center distance 150mm
No.Rated Voltage(kV)Rated current(A)Short-circuit breaking current(kA)h1(mm)h2(mm)h(mm)A(mm)B(mm)

12kv Indoor Withdrawable Circuit Breaker
VS1A-7.2, 12, 17.5-pole center distance 210mm
No.Rated Voltage(kV)Rated current(A)Short-circuit breaking current(kA)h1(mm)h2(mm)h(mm)A(mm)B(mm)

12kv Indoor Withdrawable Circuit Breaker
VS1A-7.2, 12, 17.5-pole center distance 275mm
No.Rated Voltage(kV)Rated current(A)Short-circuit breaking current(kA)h1(mm)h2(mm)h(mm)A(mm)B(mm)
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.
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