Secondary injection testing vs. primary injection testing for circuit breakers

• 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

• 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

Released for:Schneider Electric India