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Home > Products > Circuit Breaker > Fixed Type 12 Kv Vmd Vacuum Circuit Breaker for The Switchgear

Fixed Type 12 Kv Vmd Vacuum Circuit Breaker for The Switchgear

Basic Info

Model No.:  VMD

Product Description

Model NO.: VMD Operation: Manual & Electric Vacuum Circuit Breaker Arc-extinguishing Medium: Vacuum Structure: Vcb Vacuum Circuit Breaker Type: Circuit Breaker Certification: ISO9001-2000, Ohsas 180001 Rated Current: 630/1250/1600/2000/2500/3150/4000A Vacuum Circuit Mechnical Life: 10000times Vacuum Circuit Breaker Specification: ISO9001/OHSAS/OHSMS 18001 HS Code: 8535210000 Breaking Capacity: Middle& High Voltage Vacuum Circuit Breaker Speed: Normal Type Circuit Breaker Installation: Fixed & Withdrawable Vacuum Circuit Breaker Poles Number: 3 Function: Overcurrent Protection Rated Voltage: 12kv Vacuum Circuit Breaker Rated Frequency: 50Hz Vacuum Circuit Breaker Trademark: Mingde Vacuum Circuit Breaker Origin: Zhejiang Ningbo Vacuum Circuit Breaker Fixed Type 12kv Vmd Vacuum Circuit Breaker for the Switchgear

Overview

1. VS1A series of vacuum circuit breakers are the Second Generation indoor switch equipment, with the rated voltage 7.2kv, 12kv, 17.5kv and 24kv.
2. VS1A series of vacuum circuit breakers adopt the integrated design of simple structure and convenient operation.
3. It is equipped with a perfect mechanical and electrical interlock to enhance its anti-incorrect operation performance.
4. Standards: IEC62271-100, IEC56, GB1984-2003, GB/T11022, DL/T403-2000, etc.

Main Specifications and Technical Parameters of VMD
 
Item unit Data
Rated voltage kV 12
1 min power frequency withstand voltage kV 42
 
Lightning impulse withstand voltage kV 75
Rated frequency Hz 50
Rated current A 630,1250,1600,2000,2500,3150,4000
Rated short-time withstand current kA 20,25,31.5,40
Rated peak withstand current kA 50,63,80,100
Rated short-circuit breaking current kA 20,25,31.5,40
Rated short-circuit closing current kA 50,63,80,100
Rated short-circuit duration S 4
Contact over-travel mm 3.5±0.5
Clearance between open contacts mm 9±1/11±1
Average opening speed m/s 1.1±0.2
Average closing speed m/s 0.6±0.2
Opening time ms 35-60
Closing time ms 20-45
Rated operation sequence   O-0.3s-CO-180s-CO(<40kA)/
O-180s-CO-180s-CO(≥40kA)
Mechanical life cycles 10000
 
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.

External Dimension

Fixed Type 12 Kv Vmd Vacuum Circuit Breaker for The Switchgear
 VS1A-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)
1 7.2,12 630-1250 20-31.5 260 205 622 438 609
2 7.2,12,17.5 630-1250 20-31.5 280 275 637 432 598




Fixed Type 12 Kv Vmd Vacuum Circuit Breaker for The Switchgear
 VS1A-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

Fixed Type 12 Kv Vmd Vacuum Circuit Breaker for The SwitchgearVS1A-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


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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