HYBRID CIRCUIT BREAKER

In this paper you will read about hybrid circuit breaker which comes under power systems. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow. 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. High Voltage Circuit Breaker (CB) is important electrical equipment used in the power system network to isolate the faulty section from the healthy network and thus ensure safe operation of the electrical system. Vacuum Circuit Breakers and SF6 Circuit Breakers are widely used depending upon the power rating of the transmission line. The merits and demerits of the two are reviewed and the need for hybrid model is analysed.