1. Pay attention to the load current of the motor and do not exceed the additional current on the nameplate. If it is three-phase communication, you should also pay attention to whether the three-phase current is symmetrical, and the difference should not exceed 10%.
2. Pay attention to the change of power supply voltage. The deviation between the voltage change value of the motor and the extra voltage value is ±5%. Within the range, the three-phase communication voltage is required to be basically symmetrical, and the difference should not exceed 5%. At this time, the extra frequency should be maintained.
3. Pay attention to the heating condition of each part of the motor and whether it exceeds the limits of the rules, so as to adopt measures in time. When touching the cast iron shell by hand, the hand feeling caused by different temperatures can be used as a reference to determine whether the motor is overheated.
4. Pay attention to the abnormal vibration, noise and burning smell of the motor.
5. If abnormal phenomenon is found in motor operation, eliminate the cause in time, or if personal accident occurs, keep quiet, cut off the power supply immediately, check and rescue.
