24kv-1250A Vmd Vacuum Circuit Breaker in Panel

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
    2000
2500
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
 

External Dimension




 
VMD2-24-pole center distance 210mm
 
No. Rated Voltage(kV) Rated current(A) Short-circuit breaking current(kA) h1(mm) h2(mm) h(mm) B(mm)
1 24 630 20-31.5 325 310 768 747
2 24 1250 20-31.5 325 310 768 747
3 24 1250 31.5-40 345 310 768 747
4 24 1600 20-40 345 310 768 747
 
 


 
VMD4-24-pole center distance 275mm
 
No. Rated Voltage(kV) Rated current(A) Short-circuit breaking current(kA) h1(mm) h2(mm) h(mm) B(mm)
1 24 630 20-31.5 325 310 768 747
2 24 1250 20-31.5 325 310 768 747
3 24 1600 20-31.5 345 310 768 747
4 24 1600-2500 20-31.5 345 310 813 737
 
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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