Circuit breakers are designed to stop the flow of electricity under certain conditions, usually during situations like an overcurrent or short circuit or to direct the flow of the system. A circuit breaker is made up of contacts that will separate when a problem occurs. Stopping the flow of electricity keeps conditions safe and prevents damage to equipment.

In an ACB, when the contacts separate – due to overcurrent, short circuit or for operating purposes – the ACB works to eliminate the arc, making the equipment safer. The ACB uses a combination of air pressure and conductive elements to guide the arc away from the circuit safely and then stretches it until it is eliminated.