A:Isolator is a off load device which is used for isolating the
downstream circuits from upstream circuits for the reason of any maintanance on
downstream circuits. it is manually operated and does not contain any solenoid
unlike circuit breaker. it should not be operated while it is having load.
first the load on it must be made zero and then it can safely operated. its
specification only rated current is given.But circuit breaker is onload
automatic device used for breaking the circuit incase of abnormal conditions
like shortcircuit, overload etc., it is having three specification 1 is rated
current and 2 is short circuit breaking capacity and 3 is instantaneous
tripping current.
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