When testing a transformer, if one ohmmeter lead is connected to a transformer winding and the other is connected to the transformer frame, you are testing the transformer for ____.
A) shorted windings
B) grounds
C) continuity
D) voltage

Question

Quizplus · Accepted Answer

Connecting one ohmmeter lead to a transformer winding and the other to the transformer frame tests for grounds in the transformer. This is because the frame of the transformer should not be electrically conductive and any continuity between the winding and the frame indicates a ground fault. Testing for shorted windings and continuity typically requires different connections and configurations. Testing for voltage would require connecting the transformer to a power source and measuring the output voltage.

When Testing a Transformer, If One Ohmmeter Lead Is Connected