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

Circuit Breaker, Vacuum Circuit Breaker, Breaker manufacturer / supplier in China, offering 7.2 Kv-4000A Vmd Vacuum Circuit Breaker, Vmd 40.5 Kv -1250A Handcart Vacuum Breaker Embedded Pole Types, Pole Mounted 17.5kv-1250A 50Hz Vs1 Vacuum Circuit Breaker and so on.

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Supplier Homepage Product Circuit Breaker 7.2 Kv-4000A Vmd Vacuum Circuit Breaker

7.2 Kv-4000A Vmd Vacuum Circuit Breaker

Purchase Qty.:
1-99 100+
FOB Unit Price: US $1,200 US $1,080
Purchase Qty. (Pieces) FOB Unit Price
1-99 US $1,200
100+ US $1,080
Get Latest Price
Production Capacity: 22000PCS/Per Year Electrical Breaker
Transport Package: Wooden Case Electrical Breaker
Payment Terms: L/C, T/T, Western Union, Paypal

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Basic Info
  • Model NO.: VMD
  • Operation: Mannual & Electric Type Electrical Breaker
  • Arc-extinguishing Medium: Vacuum
  • Structure: Vcb Electrical Breaker
  • Type: Circuit Breaker
  • Certification: ISO9001-2000, CCC, Ohsas 180001
  • Rated Current: 4000A Electrical Breaker
  • Rated Frequency: 50/60Hz Electrical Breaker
  • Trademark: Mingde Electrical breaker
  • Origin: Cixi, Ningbo Electrical Breaker
  • Breaking Capacity: Middle& High Voltage Electrical Breaker
  • Speed: Normal Type Circuit Breaker
  • Installation: Fixed & Withdrawal Electrical Breaker
  • Poles Number: 3
  • Function: Overcurrent Protection
  • Rated Voltage: 7.2kv Electrical Breaker
  • Rrated Short-Time Withstand Current: 25\31.5\40kv Electrical Breaker
  • Mechanical Life: 30000 Times Circuit Breaker
  • Specification: CE, SGS, TUV
  • HS Code: 8535210000
Product Description
7.2 Kv-4000A VMD vacuum circuit breaker

        The complete specification of VMD series vacuum circuit breaker can meet customers' different needs.It adopts the latest embedded poles and low-resistance vacuum interrupter and empolys an accurate gear driving system in the place of the traditional chain wheel driving system.

         With main conductive circuit sealed in epoxy resin, the insulation performance will be more stable.VMD series circuit breaker has passed Type Test Report according to GB and IEC standards.It has exported to 26 countries and regions in the world.

Main Specifications and Technical Parameters of VMD

NOItem UnitTechnical Data
1Rated voltageKV7.2
21 min power frequency withstand voltage42
Lighting impulse withstand voltage(peak value)75
3Rated FrequencyHz50
4Rated currentA4000
5Rated short time withstand currentKA25,31.5,40
6Rated withstand current(peak)63,80,100
7Rated short-circuit opening current25,31.5,40
8Rated short-circuit closing current 63,80,100
9Rated duration of short-circuit S4
10Contact's clearance 3.5±0.5
11Contact's travel 9±1/11±1
12Average opening speedm/s1.1±0.2
13Average closing speed m/s0.6±0.2
14Opening timems35-60
15Closing timems20-45
16Mechanical life times30000
17Rated operating order O-0.3S-CO-180S-CO(<40KA)
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 
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.

Packing &Transportation

package:wooden case (900*900*1000mm)
shipping: by sea/air

7.2 Kv-4000A Vmd Vacuum Circuit Breaker


7.2 Kv-4000A Vmd Vacuum Circuit Breaker
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7.2 Kv-4000A Vmd Vacuum Circuit Breaker

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