Answer Posted / ankurjha

Circuit Breaker:
Device to control current drawn by the load. Has the
facility of cutting the supply in case of heavy inrush of
current/ short circuit etc..

Contactors:
device to make/ break contacts as & when required. Have
control coil which is energized/de-energized as per the
control requirement.

Isolators:
Usually meant to isolate the circuit manually, so that the
circuit can be worked upon. Have fuses for potection of
load.

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