As shown in the illustration, what mechanism will disconnect the motor from the line in case of a sustained motor overload? EL-0080

Correct Answer: Option D — overload relay heaters and overload relay NC contacts (OL)

Overload relays are specifically designed to protect motors from sustained overcurrent conditions. The heaters sense the current draw; if it exceeds the rated value for a set duration, the NC contacts open, breaking the control circuit and de-energizing the main contactor to disconnect the motor from the power line.