Difference between switch and isolator

      Difference between switch and isolator

                                                                    *switch*

~ The switch is used to intercept the load current.

~ The switch is used for low voltage level.

~ The braking time in the switch is important.

~ because the load is to break the current 

~ opening the contact to the switch cause the contact  spark.

~ the contact deteriorates at time due to the the ability to brake the load current.

~ Therefore maintenance is required.

~ there are usually indoor types.

~ most are of the manually operated type.   

                                                                       *isolator*

~ The isolator is operated at no load.

~ since the isolator is used with a circuit breaker it is used with a circuit breaker it is used at low and very high voltages.

~ the isolator has to be operated at load time only.

~ so breaking time is not a question.

~ There is no question of sparking in the isolator.

~ maintenance is less required as the load current is not able to break.

~ it can be both indoor or outdoor.

~ comparison is manual motor or pneumatically operated.