The secondary winding of a CT should never be opened when there is power applied to the primary.

Name: The secondary winding of a CT should never be opened when there is power applied to the primary.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Opening the secondary winding of a CT while power is applied to the primary can result in a dangerous voltage surge in the secondary that can cause damage to the CT or injury to personnel. It is important to de-energize the primary circuit before working on the CT.

The Secondary Winding of a CT Should Never Be Opened