How does a manual motor starter work

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manual starter motor
can the manual motor starter be used alone or only with a contactor?
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manual motor starter vs circuit breaker
manual motor starter 3 phase

To start the motor, depress the start button so that it moves inward. A mechanical interlocking device forces the stop button outward. Once activated, these Most manual starters are strictly mechanical devices and do not contain an electrical coil. The contacts are mechanically opened and closed. This simply meansManual Motor Starters (MMS) are protection devices for the main circuit. They combine motor control and protection in a single device. A motor starter is a latching switch usually electromagnetic that supplies power to a motor or whatever is hooked to it as long as the circuit is not broken.