When the stop switch in a 3-wire control circuit is momentarily opened and re-closed, the motor does not automatically restart as it does in a 2-wire control circuit that suffers a momentary power loss.
The control power is maintained to the motor-starter solenoid coil through the NO — held-closed auxiliary contacts.
When power is interrupted, there is no conductive path because both the auxiliary contacts and the Start PB switch are both NO.
This is referred to as low- or no-voltage ___________________________ (protection or release).
A) equation
B) none of the answers
C) protection
D) release
Show Answer
Answer:C
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