General Air Product's Magnetic Line Starter is a rugged industrial designed, full voltage, non-reversing NEMA rated overload protector. These starters provide protection to motor windings from harmful currents and resultant temperature rise that may be caused by either overloading the motor, sustained low line voltage, or locked rotor. Single phase and three phase starters are protected in the same way. All sizes of compressor should be accompanied by overload protection.