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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

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
  • Tests 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

Schneider Electric USA

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

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
  • Tests 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

Schneider Electric USA

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