What is a Circuit Breaker & How Does it Work?

A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overcurrent/overload or short circuit. Its basic function is to interrupt current flow after protective relays detect a fault.

Circuit breaker technology

Take an indepth look at circuit breakers with a special emphasis on the Eaton's most technologically advanced circuit breaker, the Power Defense molded case circuit breaker.


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