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  • VBI Spring Actuating Mechanism
  • VBI Spring Actuating Mechanism

VBI Spring Actuating Mechanism

Description:

This VBI actuating mechanism is for  VBI-12 vacuum circuit breaker is a type of indoor high voltage VCB, suitable for 3 phase AC,50 Hz, and rated  voltage of 12kV, and applied in places with breaking of different load and frequent operations as protection  and control unit, such as industrial and mining enterprise, power plants and transformer substations.

 

  • Product Description

VBI spring actuating mechanism

This VBI actuating mechanism is for  VBI-12 vacuum circuit breaker is a type of indoor high voltage VCB, suitable for 3 phase AC,50 Hz, and rated  voltage of 12kV, and applied in places with breaking of different load and frequent operations as protection  and control unit, such as industrial and mining enterprise, power plants and transformer substations.

 

Working Conditions:
1. Altitude not exceeding 2000m;
2. Ambient temperature: -15°c ~+40°c;
3. Relative humidity: monthly average not exceeding 95%, daily relative humidity not exceeding 95%;
4. Earthquake level not exceeding 8 class;
5. Without peril of fire, corrosion gas, explosion, vibration.

VBI spring actuating mechanism

Techinical Data

Item Unit Data
Rated voltage kV 12
Rated insulation voltage 1 min power frequency withstand voltage kV 65
Lightning impulse withstand voltage(peak) kV 75
Rated frequency Hz 50/60
Rated current A 630,1250,1600,2000,2500,3150
Rated short-time withstand current kV 20,25,31.5
Rate peak withstand current 50,63,80
Rate short-circuit duration S 4
a.c. component of rate short-circuit breaking current kA 42
Rated short-circuit making current kA 50,63,80,100
Mechanical life time 10000
Permitted abrasion thickness of moving and fixed contacts mm 3
Arcing time ms ≤15
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