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Mingde Electrical (Shanghai) Co., Ltd.

Circuit Breaker, Vacuum Circuit Breaker, Breaker manufacturer / supplier in China, offering High-Voltage 7.2kv-3150A AC Vmv Vacuum Interrupter, Zw32 12kv Outdoor Vacuum Circuit Breaker, 550 Modularized Omni-Sealed Solid Insulation Metal-Clad Switchgear and so on.

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Supplier Homepage Product Circuit Breaker High-Voltage 7.2kv-3150A AC Vmv Vacuum Interrupter

High-Voltage 7.2kv-3150A AC Vmv Vacuum Interrupter

Purchase Qty.:
1-19 20+
FOB Unit Price: US $2,060 US $1,280
Purchase Qty. (Pieces) FOB Unit Price
1-19 US $2,060
20+ US $1,280
Get Latest Price
Production Capacity: 22000PCS/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.: VMV
  • Operation: Manual & Electric Circuit Breaker
  • Arc-extinguishing Medium: Vacuum
  • Structure: Vcb Circuit Breaker
  • Type: Circuit Breaker
  • Certification: ISO9001-2000, CCC, Ohsas 180001
  • Rated Current: 3150A Circuit Breaker
  • Rated Short Time Power Frequency Withsta: 42kv Circuit Breaker
  • Trademark: Mingde Circuit Breaker
  • Origin: Cixi, Ningbo, Zhejiang Circuit Breaker
  • Breaking Capacity: Middle& High Voltage Circuit Breaker
  • Speed: Normal Type Circuit Breaker
  • Installation: Fixed & Withdrawal Circuit Breaker
  • Poles Number: 3
  • Function: Overcurrent Protection
  • Rated Voltage: 7.2 Kv Circuit Breaker
  • Rated Short -Time Breaking Current: 20/25/31.5/40ka Circuit Breaker
  • Mechanical Life: 60000 Times Circuit Breaker
  • Specification: ISO9001/OHSAS/OHSMS 18001
  • HS Code: 8535210000
Product Description
High-voltage 7.2kv-3150A AC Vmv Vacuum Interrupter


     A brand new series of products, wider use in different fields and environment. Mechanical life is up to 6 0,000 times. It is expandable to smart circuit breaker.

     Modularized design of the operation mechanism is the highlights of VMV circuit breaker. With opening module and closing module in one part, the independent operation mechanism makes the standardized production and maintenance much easier.

     We improved VMV circuit breakers' driving system, using the gear driving system instead of the traditional chain wheel driving system. The circuit breaker operation will run more smoothly with a longer mechanical life.

     The application of high-performance oil buffer can greatly reduce moving contact's over-swing and rebound during the circuit breakers' opening process. In this way, it avoids the reduction of mechanical life when vacuum interrupter is over-fatigue, resulted from contact's over-swing

VMV Circuit Breakers' Embedded Poles
       VMV circuit breakers adopt the second generation embedded poles, through advance APG technology, the lowresistance vacuum interrupter and main conductive circuit parts are sealed in epoxy resin, greatly simplify the assembly process, lower the circuit's resistance, and improved the stability.  
        What's more, Vacuum interrupter is sealed in with epoxy resin material, guaranteed the minimized affection from external environment, and its external insulating ability will avoid the influence from dust, moisture, small animal, condensation and filthy, fully satisfy requirements of GB/IEC standards of creep distance in secondary filthy area.

Technical Innovation
        VMV circuit breakers' overall structure is optimize base on traditional VCB, with more simple structure .What's more, all VMV circuit breakers' operating mechanism are standard and compatible, so great reduced  users' equpments maintenance cost. 
         Modularized design of operating mechanism is VMV vacuum circuit breaker' shighlight,   opening module and closing module are in one part, can separate from mechanism'    other parts, so convenient to maintain, quick to exchange ,  and  with short power cut for repaing. What's more  manufacturer's prodution effciency is much more higher.

Gear Driving System

    Fully Automatic Production Assembly Line VMV circuit breaker's assembly line is designed and produced by ourselves, according to our actual production need   and  circuit breakers' technical features.   Every production process is controlled and monitore computer .Thank you for automatic line, our products increased greatly ,  up to  22000 piece per year.

Technical Parameters
NOItem UnitTechnical Data
1Rated voltageKV7.2
21 min power frequency withstand voltage42
 Lighting impulse withstand voltage(peak value)75
3Rated FrequencyHz50
4Rated currentA3150
5Rated short time withstand currentKA31.5,40
6Rated withstand current(peak)80,100
7Rated short-circuit opening current31.5,40
8 Rated short-circuit closing current 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 lifetimes30000
17Rated operating order O-0.3S-CO-180S-CO(<40KA)

External Dimension

High-Voltage 7.2kv-3150A AC Vmv Vacuum Interrupter

VMV2-7.2,12,17.5-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)

High-Voltage 7.2kv-3150A AC Vmv Vacuum Interrupter
VMV2-7.2, 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)

High-Voltage 7.2kv-3150A AC Vmv Vacuum Interrupter

VMV2-7.2, 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 

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.
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