What is motor protection?

- Nov 02, 2018 -

What is motor protection?

 

Door Motors.jpgWhen the motor exceeds its rated current for a long time under the overload fault, the motor will overheat, the insulation will be reduced and burned. The protector calculates the heat capacity of the motor according to the heating characteristics of the motor, and simulates the heating characteristics of the motor to protect the motor. Protect features corresponding to different trip levels.


When the load on the motor is a pump load, the motor will be harmed by no-load or under-load operation. The protector provides under-load protection. When the average current and rated current of the three-phase are lower than the set value, the protector should be Action during the action set time or alarm during the alarm time.


When the motor is started or during operation, if the electric motor shaft is stuck due to excessive load or mechanical reasons, the motor will be overheated, the insulation will be reduced and the motor will be burned, and the stall protection will be applied to the motor. This type of fault occurs during start-up protection. Blocking protection is suitable for protection when such fault occurs during motor operation. When the current reaches the set current, the protector should operate within the set time of the action or alarm during the alarm time.