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Home > Products > Circuit Breaker > 12kv 630A Vmd Hv Electric Vacuum Breaker

12kv 630A Vmd Hv Electric Vacuum Breaker

Basic Info

Model No.:  VMD

Product Description

Model NO.: VMD Operation: Manual and Electric Type Circuit Breaker Arc-extinguishing Medium: Vacuum Structure: Vcb Circuit Breaker Type: Circuit Breaker Certification: ISO9001-2000, CCC, Ohsas 180001 Rated Current: 630A Circuit Breaker Lighting Impulse Withstand Voltage: 75kv Circuit Breaker Rated Short-Time Withstand Current: 20\25\31.5\40 Ka Circuit Breaker Specification: OHSAS/ OHSMS 18001, ISO9001 HS Code: 8535210000 Breaking Capacity: High and Medium Voltage Circuit Breaker Speed: Normal Type Circuit Breaker Installation: Fixed and Handcart Type Circuit Breaker Poles Number: 3 Function: Overcurrent Protection Rated Voltage: 12kv Circuit Breaker 1 Min Power Frequency Withstand Voltage: 42kv Circuit Breaker Rated Frequeny: 50Hz Circuit Breaker Trademark: Mingde Circuit Breaker Origin: Cixi, Ningbo Circuit Breaker 12kV 630A Vmd HV Electric Vacuum Breaker
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 Specifications and Technical Parameters 
NO Item Unit Technical Data
1 Rated voltage KV 12
2 1 min power frequency withstand voltage 42
Lighting impulse withstand voltage(peak value) 75
3 Rated Frequency Hz 50
4 Rated current A 630
5 Rated short time withstand current KA 20,25,31.5,40
6 Rated withstand current(peak) 50,63,80,100
7 Rated short-circuit opening current 20,25,31.5
8  Rated short-circuit closing current 50,63,80
9 Rated duration of short-circuit S 4
10 Contact's clearance   3.5±0.5
11 Contact's travel   9±1/11±1
12 Average opening speed m/s 1.1±0.2
13 Average closing speed m/s 0.6±0.2
14 Opening time ms 35-60
15 Closing time ms 20-45
16 Mechanical life  times 30000
17 Rated operating order   O-0.3S-CO-180S-CO
 
External Dimensions

12kv 630A Vmd Hv Electric Vacuum Breaker
VMD2-7.2,12,17.5-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)
1 7.2,12,17.5 630-1250 20-31.5 260 205 622 438 609
2 7.2,12,17.5 630-1250 20-31.5 280 275 637 432 598
   


12kv 630A Vmd Hv Electric Vacuum Breaker
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)
1 7.2,12,17.5 630-1250 20-31.5 260 205 622 438 609
2 7.2,12,17.5 630-1600 20-31.5 280 275 637 432 598
3 7.2,12 1250-1600 40 295 310 697 432 598
4 7.2,12 2000 31.5-40 295 310 697 432 598

12kv 630A Vmd Hv Electric Vacuum BreakerVMD2-7.2, 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)
1 7.2,12,17.5 630-1250 20-31.5 280 275 637 432 598
2 7.2,12 1250-1600 40 295 310 697 432 598
3 7.2,12 1600-2500 25-40 295 310 697 432 586
4 7.2,12 3150-4000 31.5-40 295 310 697 432 586
5 7.2,12 3150-4000 31.5-40 295 310 733 432 586

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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