A circuit breaker is a Manually or automatically operated electrical switch designed to protect an electrical circuit from damage caused by overcurrent, typically resulting from an overload or short circuit.
A circuit breaker is a device which can stop the flow of electricity around a circuit by switching itself to prevent excessive current, as that caused by a short circuit, from damaging the apparatus in the circuit or from causing a fire.
Importance Of Circuit Breaker
So for timely disconnecting and reconnecting different parts of electrical power system network for protection and control, there must be some special type of switching protection devices which can be operated safely under huge current carrying condition and protect the network. During the interruption of huge current, there would be large arcing in between switching contacts, so care should be taken to quench these arcs in the circuit breaker in a safe manner. The circuit breaker is the special device which does all the required switching operations during high current carrying condition.
Types Of Circuit Breaker
According to their arc quenching media, the circuit breaker can be divided into-
- Oil circuit breaker.
- Air circuit breaker.
- SF6 circuit breaker.
- Vacuum circuit breaker.
According to their services, the circuit breaker can be divided into-
- Outdoor circuit breaker
- Indoor breaker.
According to the operating mechanism of circuit breaker, they can be divided as-
- Spring operated circuit breaker.
- Pneumatic circuit breaker.
- Hydraulic circuit breaker.
According to the voltage level of installation types of circuit breaker are referred as-
- High voltage circuit breaker.
- Medium voltage circuit breaker.
- Low voltage circuit breaker.