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Low Voltage Power Breaker Trip Unit Retrofit

 

 

 

 

 

 

 

 

Maintaining proper coordination is critical to insure that any fault is isolated to the smallest possible area.  Unfortunately, many legacy breakers are unable to provide proper protection due to:

  • Thermal-magnetic elements have aged and tolerance has shifted
  • Early electronic trip units were peak-sensing which can nuisance trip on modern systems due to harmonic currents

While you could replace the complete breaker or switchgear assembly, is their another way?

Trip Unit Retrofit of Most Existing Brands

Cutler-Hammer has developed an extensive library of trip unit replacement solutions for many brands of low voltage power breakers including:

  • Westinghouse
  • ITE
  • GE
  • Gould
  • Allis-Chalmers
  • GTE
  • Siemens Allis
  • Federal Pacific
  • Federal Pioneer
  • Roller-Smith
  • Brown-Boveri

While step-by-step instructions are available on this web site for replacing the original trip unit with a new Digitrip trip unit, we recommend that you contact your local CHESS represenative for evaluation and comment.


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