273. As shown in figure «A» of the illustration, what is the purpose of the «test button»

The test button is used to reset the now open normally closed relay contacts after an overload trip.
The test button is used to mimic an overload to test the trip function of the overload relay.
The test button is used to reset the now closed normally open relay contacts after an overload trip.
The test button is used to test the actual current trip value of the overload relay.

Comments (0)

There are no comments at the moment. If you found an error or think question is incorrect, tell everyone about it