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Home > Products > Circuit Breaker > Factory Supply 24kv-1250A Vmv Vacuum Circuit Breaker with Embedded Pole

Factory Supply 24kv-1250A Vmv Vacuum Circuit Breaker with Embedded Pole

Basic Info

Model No.:  VMV

Product Description

Model NO.: VMV Operation: Manual & Electric Arc-extinguishing Medium: Vacuum Structure: Vcb Type: Circuit Breaker Certification: ISO9001-2000, Ohsas 180001 Rated Current: 1250A Mechnical Life: 10000times Specification: SGS, TUV HS Code: 8535210000 Breaking Capacity: Middle& High Voltage Speed: Normal Type Circuit Breaker Installation: Fixed & Withdrawalable Poles Number: 3 Function: Overcurrent Protection Rated Voltage: 24kv Rated Frequency: 50Hz Trademark: Mingde Origin: Zhejiang Ningbo Factory Supply 24kv-1250A Vmv Vacuum Circuit Breaker with Embedded Pole

Product Overview

1. A brand new series of products, wider use in different fields and environment
2. Mechanical life up to 60,000 times
3. Expandable to smart circuit breaker
 
Operation Mechanism

VMV Modularized Operation Mechanism
VMV Modularized Operation Mechanism (with smart unit)
   Modularized design of the operation mechanism is the highlights of VMV circuit breaker. With opening module and closing module in one part, the independent operation mechanism makes the standardized production and maintenance much easier.
 
Gear Driving System

    We improved VMV circuit breakers' driving system, using the gear driving system instead of the traditional chain wheel driving system. The circuit breaker operation will run more smoothly with a longer mechanical life.
Opening Oil Buffer
   The application of high-performance oil buffer can greatly reduce moving contact's over-swing and rebound during the circuit breakers' opening process. In this way, it avoids the reduction of mechanical life when vacuum interrupter is over-fatigue, resulted from contact's over-swing.

Main Specifications and Technical Parameters 
 
Item unit Data
Rated voltage kV 24
1 min power frequency withstand voltage kV 50
 
Lightning impulse withstand voltage kV 95
Rated frequency Hz 50
Rated current A 1250
Rated short-time withstand current kA 20,25,31.5
Rated peak withstand current kA 50,63,80
Rated short-circuit breaking current kA 20,25,31.5
Rated short-circuit closing current kA 50,63,80
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.

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.

Certification

Factory Supply 24kv-1250A Vmv Vacuum Circuit Breaker with Embedded Pole

    Production Process
  Factory Supply 24kv-1250A Vmv Vacuum Circuit Breaker with Embedded Pole

Factory Show

Factory Supply 24kv-1250A Vmv Vacuum Circuit Breaker with Embedded Pole

 

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