Precautions for use, maintenance and care of motor protectors

The function of the motor protector is to provide comprehensive protection and control for the motor. It will give an alarm or protective control when the motor has overcurrent, undercurrent, phase failure, stall, short circuit, overvoltage, undervoltage, leakage, three-phase imbalance, overheating, grounding, bearing wear, stator and rotor eccentricity, or winding aging.

The following points should be noted when using a motor protector:

1. Measurement and verification: When installing, removing or replacing a motor protector, you need to measure and verify the circuit first to ensure that the circuit connection is correct and the electrical parameters meet the requirements to reduce the occurrence of faults.

2. Protection parameter setting: Before using the protector, you need to set the protection parameters according to factors such as the motor's operating current, load type, and ambient temperature to ensure that the protector can correctly play a protective role at the right time.

3. Choose a suitable protector: Different types of motors require different protectors. The appropriate protector should be selected according to the specific situation to ensure the reliability of the protection effect.

4. Prevent overload: The main function of the motor protector is to prevent the motor from overloading. The motor should be prevented from being overloaded during use to avoid false triggering and failure of the protector.

5. Regular inspection: The motor protector should be inspected and maintained regularly, such as checking whether the protection parameter settings are correct, whether the circuit connection is firm, and whether the protector function is normal.

6. Prevent foreign objects from entering: When using a motor protector, care should be taken to prevent foreign objects from entering, especially during installation and maintenance, to avoid foreign objects from entering, so as not to cause failure and damage to the motor protector.

7. Pay attention to safe operation: Pay attention to safe operation when using the motor protector. For example, you need to cut off the power supply during replacement and maintenance to avoid electric shock accidents.

In short, the correct use and maintenance of motor protectors can extend the life of the motor, improve the operating safety of electrical equipment, and reduce the occurrence of failures.

In order to ensure the normal operation of the motor protector, regular maintenance and servicing are required. The following are some methods for motor protector maintenance and servicing:

1. Check the circuit wiring of the motor protector regularly to ensure that the wiring is tight and not damaged, burnt, oxidized, or rusted. When wiring, pay attention to the correctness of the markings.

2. Regularly check whether the thermal element or thermal tester of the thermal relay protector is sensitive and whether it can ring or move at the specified time. For example, you can use a soldering iron to check the sensitivity of the thermal element, or perform a thermal test to test the protector regularly.

3. Clean the appearance and internal parts of the motor protector regularly to prevent problems such as poor contact or shortened life of internal components caused by dust, oil and other pollution of electrical components.

4. Regularly check the connection of the motor itself, whether the motor cable is intact and the outer sheath is damaged to prevent electrical failure. Check the electrical components, instrument lamps and instrument calibration and instrument line contact once a year.

5. Keep the environment around the motor clean and dry to prevent corrosion, oxidation and other problems inside the motor protector.

In short, the maintenance and care of motor protectors are very important to ensure the normal operation of motors and extend the service life of electrical equipment. Regular maintenance and care can effectively prevent various faults and problems of motor protectors and improve the reliability and safety of electrical equipment operation.