L&T CM90518OOKO 4 Pole MCCB

It is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overcurrent or overload or short circuit.All circuit breaker systems have common features in their operation, but details vary substantially depending on the voltage class, current rating and type of the circuit breaker.The circuit breaker must detect a fault condition; in common mains and low voltage circuit breakers, this is usually done within the breaker itself.Circuit breakers for large currents or high voltages are usually arranged with a protective relay pilot devices to sense a fault condition and to operate the trip opening mechanism.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