• The trend in interrupter design is to continuously reduce the vacuum envelope size and enhance short-circuit capability at the same time. VCB designs are continuously reviewed and upgraded to keep up with the latest developments in vacuum technology.
  
  
  Maintenance - The VCB requires minimal maintenance. Its design life-span is 20years or 10000 operations.
  
  Namenclature - The model numbers of VCB's observe the following nomenclature.

A motor charged spring, stored energy mechanism with manual and electrical release is offered as standard Standard control voltage is 110V DC.
In the double-busbar models, the VCB assembly as mounted on a lifter which raises and lowers the VCB to engage on to "Reserve" or "Main" busbars by means of a "Jackscrew" built into the VCB truck.
The VCB has to be withdrawn to the "Disconnected" position before it can be raised or lowered. thus effectively eliminating ant possibility of operator error.