First Trip Testing of Circuit Breakers

First Trip Testing of Circuit Breakers

Significance of Circuit Breaker "First Trip Time"
A circuit breaker may not be called upon to operate and clear a fault for years, but when a fault occurs, it is expected to operate within it's published time-current characteristics. Unfortunately, frequently this does not happen... environmental contaminants, hardened grease, vibration and other factors can adversely affect the operating time of the circuit breaker.

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