Answer / gunasekaran

VCB using for high voltage switching ACB for low voltage
switching

Answer / rites

Breakers are designed for various breaking capacity which
in turn is related to arc quenching media.

VCB - vaccum is the arc quenching media and hence can break
high current high voltage supply and hence used in medium
voltage 11/22kv.

ACB - Air is the quenching media and hence used in LT side
i.e 415 v circuits.

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