Engine 2014: Electricity

1. A The test button is used to reset the now open normally closed relay contacts after an overload trip.
2. B The test button is used to test the actual current trip value of the overload relay.
3. C The test button is used to mimic an overload to test the trip function of the overload relay.
4. D The test button is used to reset the now closed normally open relay contacts after an overload trip.

Tip: press A-D to answer