What is the name of the type of motor control circuit that will not permit automatic restarting after power is restored, following a power failure?

Correct Answer: Option A — low voltage protection

Low voltage protection (three-wire control) utilizes a maintained holding contact across the start button. When supply voltage drops significantly or fails, the control circuit drops out and will not automatically restart when power returns, preventing unexpected machinery movement per 46 CFR Subchapter J.