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Motor protectorThe problem of the single function of the thermal relay has been solved, and the disadvantage of the power supply that needs to be operated has been created. Although the electronic circuit has become larger and the requirements for the power supply that needs to be operated are expected, a series of problems have arisen in the use of the motor protector, such as the need to select the power supply terminal block before use, and to understand the power supply voltage level and many other troubles. In addition, because the motor protector needs to work continuously, the equipment failure rate is also very high due to factors such as fluctuations in the power supply voltage, shocks, and its own heating.

Motor protectors are composed of various electronic components and various household electrical appliances. Under normal circumstances, they have different mechanical service life and electrical service life. If they are not operated properly or under abnormal conditions, they will accelerate the aging of electrical components and shorten the service life of the protector.

Therefore, whether it is natural or human error, it is inevitable that malfunctions will occur and affect normal operation. Therefore, the proper use of motor protectors and normal daily maintenance are very important. Because there are many types of protectors and the structural precision is not high, the actual maintenance methods are also different in level. Here we only focus on the maintenance and common problems with relevant characteristics of the protectors.  

The maintenance of motor protectors includes daily maintenance, full-process safety inspections and regular maintenance, including inspections before each start-up.