Air Circuit Breakers are Circuit breakers where air is used as the medium of extinguishing the arc. The air is usually compressed and kept in a cylinder. When the breaker operates and the contact separation occurs,
Air Circuit Breakers are mostly used in the LV range. They can interrupt currents of several thousand amperes.
Air Circuit breakers are provided with an inherent current sensing mechanism like the thermo-magnetic release.
|Arc Chute used in Air Circuit Breakers|
Air Circuit Breakers are available in both Three pole and Four pole versions.
Air Circuit breakers are used widely in the industry for the protection of facilities and transmission lines. They are also used for protection of electric equipment such as transformers, motors, etc. Air circuit breakers are also used in mines and on board ships.