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Circuit breaker tester - MS-2A
Light Weight, Portable Primary Injection Test InstrumentOvercurrent Relay Testing
Ground Fault Performance Testing for NEC 230.95
Circuit Breaker Testing
A variable DC voltage is needed to test a circuit breaker. Substation batteries should not be used since this entails considerable risk for testing personnel, testing equipment and also for the equipment being tested. The best way to ascertain whether or not solenoids and protective mechanisms are sluggish or set improperly is to perform a test at minimum tripping voltage. The minimum trip voltage test is described in a number of international and national standards such as IEC 62271-100, ANSI C37.09 etc.