CliP's

G&W Electric Co.'s Current Limiting Protectors(CLiP®) can offer the advantages of current limitation for 2.8 through 38 kV systems with continuous current ratings up to 5000 A.

The CLiP is a commutating form of current limiting device where the continuous current is carried by a continuous copper busbar path. This path is opened under overcurrent conditions to introduce a parrallel mounted current limiting fuse.

Compact, totally sealed construction permits the CLiP to be installed both indoors and out, either pole or structure mounted or within an enclosure.

The CLiP's unique ability to provide high continuous current ratings with current limitation and ultra-high speed of operation in one package make it an economical solution for a variety of overcurrent protection needs including:

• System Upgrade - without replacing underrated equipment such as circuit breakers, reclosers, switches
  or bus.
  
  
• Reactor Bypass - to eliminate costly operating losses and eliminate voltage regulation problems.
  
  
• Transformer Protection - to minimize damage by reducing fault energy.
  
  
• Cogeneration - to limit contribution to the system while protecting your cogenerator investment.
  
  
• Lower Breaker Ratings - to reduce the cost of full rated equipment in new installations while improving
  protection.
  
  
• Close Bus Ties - without exceeding equipment ratings.
  
  

A number of CLiP's have been installed and specified in Alberta:

• ATCO Electric (Alberta Power)
• ENMAX (City of Calgary)
• Champion Paper (Hinton, Alberta)
• Shell (Waterton, Alberta)
• TransAlta (New Zealand - Southdown Cogeneration)

Reference article
Commutating Current Limiters for detailed application and operation information.