What is the primary function of a motor starter in electrical installations?

• A. To protect against overloads
• B. To energize the motor automatically
• C. To provide controlled starting and stopping of a motor
• D. To convert AC to DC

Answer: (C)

Motor starters are used to safely connect and disconnect a motor from its power supply in a controlled way. They typically combine a contactor, which acts as a remote switch to energize or de-energize the motor, with an overload protection device that trips if current is too high or the motor overheats. This setup lets you start and stop the motor reliably through control circuits (local switches, timers, or automation) while reducing electrical and mechanical stress from sudden starts. They do not convert AC to DC, and while overload protection is included, the main role is providing controlled starting and stopping of the motor.