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Home > Products > Circuit Breaker > 24kv AC Spring Operated Vmd Series Breaker 630A 1250A 2000A 2500A

24kv AC Spring Operated Vmd Series Breaker 630A 1250A 2000A 2500A

Basic Info

Model No.:  VMD

Product Description

Model NO.: VMD Operation: Manual & Electric Type Vacuum Circuit Breaker Arc-extinguishing Medium: Vacuum Structure: Vcb Vacuum Circuit Breaker Type: Circuit Breaker Certification: ISO9001-2000 Rated Current: 630/1250/1600/2000/2500A Vacuum Circuit Breaker Lightning Impluse Withstand Voltage: 125kv Vacuum Circuit Breaker Rated Short-Time Withstand Current: 20/25/31.5A Vacuum Circuit Breaker Rated Short-Circuit Opening Current: 20/25/31.5ka Vacuum Circuit Breaker Trademark: Mingde Vacuum Circuit Breaker Specification: SGS, TUV HS Code: 8535210000 Breaking Capacity: Middle& High Voltage Vacuum Circuit Breaker Speed: Normal Type Circuit Breaker Installation: Fixed & Withdrawal Type Vacuum Circuit Breaker Poles Number: 3 Function: Overcurrent Protection Rated Voltage: 24kv Vacuum Circuit Breaker 1min Power Frequency Withstand Voltage: 65kv Vacuum Circuit Breaker Rated Frequency: 50Hz Vacuum Circuit Breaker Rated Withstand Current(Peak): 50/63/80ka Vacuum Circuit Breaker Mechanical Life: 30000 Times Vacuum Circuit Breaker Transport Package: Wooden Case Vacuum Circuit Breaker Origin: Cixi, Ningbo, Zhejiang Vacuum Circuit Breaker 24kv AC Spring Operated Vmd Series  Breaker 630A 1250A 2000A 2500A

24kv AC Spring Operated Vmd Series Breaker 630A 1250A 2000A 2500A
Product Overview

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 employs an accurate gear driving system in the place of tradidtional chain wheel driving system. With main conductive circuit sealed in epoxy resin, the Insulation performance will be more stable. VMD series circuit breaker passed Type Test Report according to GB and IEC standards and has been exported to 26 countries and regions in the world.

Main parameters

NO Item Unit Technical Data
1 Rated voltage KV 24
2 Rated insulating level Rated short time power frequency withstand voltage(1 min) 65
Rated lighting impulse withstand voltage(peak value) 125
3 Rated frequency HZ 50
4 Rated current A 630 630 1250
1250 1250 1600
5 Rated short circuit breaking current KA 20 25 31.5
6 Rated short time withstand current 20 25 31.5
7 Rated peak withstand current 50 63 80
8 Rated short-circuit making current       (peak value) 50 63 80
9 4S Rated short-time withstand current 20 25 31.5
10 Rated peak value of current 50 63 80
11 Rated making surge current of capacitor bank 12.5(The frequency is less than 1000Hz)
12 Rated breaking current of single/symmetrical capacitor bank 630/400(The value should be 800/400 while the current is 40KA)
13 Mechanical life Times 10000,30000,60000
14 Duration of rated short-circuit current s 4
15 Power frequency withstand voltage of secondary circuit V 2000
16 Rated operational voltage Making coil AC110/220  DC110/220
Breaking coil AC110/220  DC110/220
Energy-storage motor AC110/220  DC110/220
17 Making time(under Rated voltage) ms ≤60
18 Breaking time(under Rated voltage) ≤45
19 Permitted abrasion thickness of moving and fixed contacts mm 3
20 Energy storage time S <=15
21 Clearance mm 131
22 Travel 41
23 Bounce time(making) ms <=2
24 Three pole making/breaking non-simultaneity <=2
25 Average breaking speed 1.1~1.7
26 Average making speed 0.6~1.1
27 Contact pumping (breaking) mm ≤3
28 Conductance circuit resistance μΩ
Withdrawal Style Rated current
≤45 630~1250A
≤35 1600~2000A
≤25 More than 2500A
29 Rated operating order   O-0.3s-CO-180s-CO
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.


24kv AC Spring Operated Vmd Series Breaker 630A 1250A 2000A 2500A

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.

24kv AC Spring Operated Vmd Series Breaker 630A 1250A 2000A 2500A

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