SACA Electric Motor Control Systems 1 (C-202) Practice Test

A motor starter and a motor controller serve different purposes in the operation of electric motors, which clarifies why the correct answer indicates they are not the same.

A motor starter is specifically designed to start and stop the motor. It includes components such as contactors and overload relays that provide protection to the motor during operation. The main function of a starter is to manage the power supply to the motor by enabling or disabling it without the need for manual switching, often integrating safety features to prevent motor damage from overloads.

On the other hand, a motor controller encompasses a broader range of functionalities. It can regulate the speed, torque, and direction of the motor, in addition to performing the basic start and stop functions provided by a starter. Controllers can include variable frequency drives or programmable logic controllers that allow for more sophisticated motor management and performance optimization.

This distinction highlights that while both devices work with electric motors, their functions and complexities differ significantly, reinforcing the interpretation that they are not synonymous.