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Secondary Injection Testing vs. Primary Injection Testing for Circuit Breakers

Issue:
Secondary Injection Testing vs. Primary Injection Testing for Circuit Breakers

Product Line:
Molded Case Circuit Breakers

Environment:
Typical operating environment for circuit breakers

Cause:
Evaluation of differences

Resolution:

Secondary injection testing:
  • Can be done on Electronic breakers only
  • Quick
  • Tests the trip unit only
  • Easier
  • Takes less expertise to run the test
  • Test kit is small and portable
  • Less expensive

Primary injection testing
:
  • Can be done on thermal magnetic and electronic breakers
  • Time intensive
  • Test complete breaker from the CT, CT wiring to the trip unit, and the trip unit
  • Takes more expertise to run the test
  • Equipment is heavy and less portable
  • More expensive
 
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