VBI Spring Actuating Mechanism

VBI  spring actuating mechanism

 

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• 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

• VBI spring actuating mechanism

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