[ ACB ] Air circuit breaker

A circuit breaker in which the contacts open and close in the air at atmospheric pressure is known as an air circuit breaker.

A circuit breaker in which the contacts open and close in the air at atmospheric pressure is known as an air circuit breaker. The principle of arc interruption followed in air circuit breaker different from those in any other type of circuit breaker. While both types of circuit breakers have the same objective ie. to prevent the resumption of arcing after current zero by creating a situation wherein the contact gap will withstand the system recovery voltage. In the air circuit breaker, the situation is achieved by creating an arc voltage in excess of the supply voltage.

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