Answer / shrek

ISOLATORS work on off-load where as ACB works on on load. ACB
operates on faults conditions in system.

Answer / asish

ACB means air circuit breaker, it can be used in on load
condition,i.e both normal and fault condition due to its arc
quenching method where as in case of isolator, it is used as
a off load switch.

Answer / yaswanth

isolator is used to isolate the individual loads&A.C.B's are
used to isolate the whole power to all individual loads in
fault position

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