Gold Member Since 2015
Audited Supplier

Mingde Electrical (Shanghai) Co., Ltd.

Vacuum Circuit Breaker, Switchgear, Earthing Switch manufacturer / supplier in China, offering 24kv-2500A Vs1 Vacuum Circuit Breaker with Ce Approval, 12kv-4000A Vmd Vacuum Circuit Breaker, 40.5kv 630A Vmd Series Indoor Hv Assembly Vacuum Circuit Breaker and so on.

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Main Products

vmd [Jan 18,2016]
vmd
Overview

1. The complete specification of VMD series vacuum circuit breaker can meet customers' different needs.
2. VMD adopts the latest embedded poles and low-resistance vacuum interrupter. With main conductive circuit sealed in epoxy resin, the insulation performance will be more stable.
3. VMD employs an accurate gear driving system, instead of the traditional chain wheel driving system.  
4. VMD series circuit breaker passed Type Test Report according to GB and IEC standards.
5. VMD series circuit breaker has exported to 26 countries and regions in the world.


Main Technical Parameters
    
ItemunitData
Rated voltagekV17.5
1 min power frequency withstand voltagekV50
Lightning impulse withstand voltagekV95
Rated frequencyHz50
Rated current
 
A630/1250/1600
Rated short-time withstand currentkA20,25,31.5
Rated peak withstand currentkA50,63,80
Rated short-circuit breaking currentkA20,25,31.5
Rated short-circuit closing currentkA50,63,80
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)/
O-180s-CO-180s-CO(≥40kA)
Mechanical lifecycles10000,30000
  

External Dimensions
 


VMD2-7.2,12-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)
17.2,12,17.5630-125020-31.5260205622438609
27.2,12,17.5630-125020-31.5280275637432598





 
VMD2-7.2, 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)
17.2,12,17.5630-125020-31.5260205622438609
27.2,12,17.5630-160020-31.5280275637432598
37.2,121250-160040295310697432598
47.2,12200031.5-40295310697432598
 


  
VMD2-7.2, 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)
17.2,12,17.5630-125020-31.5280275637432598
27.2,121250-160040295310697432598
37.2,121600-250025-40295310697432586
47.2,123150-400031.5-40295310697432586
57.2,123150-400031.5-40295310733432586