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Motor Thermal Protection Overview
Apr 14, 2018

The commonly used thermal protection components of small and medium-sized three-phase asynchronous motors can be roughly divided into three categories: PTC thermistors, PT100 temperature sensors, and bimetal temperature relays. There is also a moisture-proof heating tape for internal heating of the motor in a humid environment. These temperature protection elements are buried in corresponding positions inside the motor, such as the motor windings or the front and rear bearing covers of the motor, when the motor is overvoltage, undervoltage When the temperature of the motor winding or bearing is too high due to faults such as overcurrent, phase loss or overload, such signals are transmitted to the temperature control instrument of the motor, which can immediately cut off the power of the motor and protect the motor.


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