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Home > Products > Circuit Breaker > 12kv-1250A Vmv New-Designed Fixed Type 3 Phase Vacuum Circuit Breaker

12kv-1250A Vmv New-Designed Fixed Type 3 Phase Vacuum Circuit Breaker

Basic Info

Model No.:  VMV

Product Description

Model NO.: VMV Operation: Manual and Electrical Type Vacuum Circuit Breaker Arc-extinguishing Medium: Vacuum Structure: Vcb Vacuum Circuit Breaker Type: Circuit Breaker Certification: ISO9001-2000, CE Rated Short-Circuit Opening Current: 20/25/31.3ka Vacuum Circuit Breaker Lightning Impluse Withstand Voltage: 75kv Vacuum Circuit Breaker Specification: SGS, Tuv HS Code: 8535210000 Breaking Capacity: High and Medium Voltage Vacuum Circuit Breaker Speed: Normal Type Circuit Breaker Installation: Fixed and Handcart Type Vacuum Circuit Breaker Poles Number: 3 Function: Overcurrent Protection Rated Current: 1250A Vacuum Circuit Breaker Rated Withstand Curent: 50/63/80ka Vacuum Circuit Breaker Trademark: Mingde Vacuum Circuit Breaker Origin: Cixi, Ningbo, Zhejiang Vacuum Circuit Breaker 12kv-1250A Vmv New-designed  Fixed Type 3 Phase Vacuum Circuit Breaker 
Overview

1. A brand new series of products, wider use in different fields and environ-ment.
2. Mechanical life up to 60,000 times.
3. Expandable to smart circuit breaker.
 
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 ind-ependent operation mechanism makes the standardized production and mai-ntenance 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 bre-aker 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  proce-ss. In this way, it avoids the reduction of mechanical life when vacuum interr-upter is over-fatigue, resulted from contact's over-swing.
 
External Dimensions

12kv-1250A Vmv New-Designed Fixed Type 3 Phase Vacuum Circuit Breaker
  VMV2-7.2,12-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 7.2,12,17.5 630-1250 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-1250A Vmv New-Designed Fixed Type 3 Phase Vacuum Circuit Breaker
VMV2-7.2, 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-1250A Vmv New-Designed Fixed Type 3 Phase Vacuum Circuit Breaker   VMV2-7.2, 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
  Technical  Parameters  

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

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

10000,30000,60000

   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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