A circuit breakeris an automatically operatedelectricalswitchdesigned to protect anelectrical circuitfrom damage caused byoverloadorshort circuit.
Its basic function is to detect a fault condition and interrupt current flow. Unlike afuse, 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 largeswitchgeardesigned to protecthigh voltagecircuits feeding an entire city.
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