define circuit breaker
define circuit breaker
Circuit breaker
A
circuit breaker is an automatically operated 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. Unlike a fuse, which operates once and then must be
replaced, a circuit breaker can be reset (either manually or automatically) to
resume normal operation. Circuit breakers are made in varying sizes, from small
devices that protect an individual household appliance up to large switchgear
designed to protect high voltage circuits feeding an entire city .
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