The most commonly used LVCB
Almost all the low voltage switch gears are equipped with ACBs
Has wide range of protections from Over current to under voltage
There are a number of releases available in the breaker
The releases are connected to relays based in the requirement. Say, for under voltage or earth-fault tripping
Arc quenching is done in the air. No special device is used here except provision for arc elongation
Air Circuit Breaker
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