With a compelling relay, the motor is started at low speed and is then accelerated automatically through successive speed steps until the selected speed is reached.

Question

Quizplus · Accepted Answer

A compelling relay does not control motor speed or acceleration. It is typically used for monitoring and protection purposes in electrical circuits, not for speed control of motors. Speed control and acceleration of motors are usually achieved through devices like variable frequency drives (VFDs) or motor starters with speed control capabilities.

With a Compelling Relay, the Motor Is Started at Low