(1) The temperature rise of the motor during normal operation should not exceed the permissible limits should always pay attention to the run to monitor the temperature rise for each part.

    (2) monitoring the motor load current. Motor failure, the Metropolitan of the stator current surge, the motor from overheating. The larger power motor should be fitted with the ammeter monitors the load current of the motor. The motor load should not exceed the nameplate rated current value, or to identify the cause and take measures to eliminate adverse situation to continue to run.

    (3) monitors the supply voltage, the frequency change and the voltage unbalance. The supply voltage and frequency is too high or too low, the current imbalance of the three-phase voltage imbalance can cause motor overheating or other irregularities.

    (4) Note that the odor of the motor, vibration and noise. Winding will be issued due to high temperature insulation burning smell. Some failures, especially mechanical failure, will soon be reflected as vibration and noise, smell the burnt smell or found abnormal vibration or grazing sound King buzzing or other noises, power outage inspection .

    (5) always check the bearing heating, oil spills, oil change on a regular basis. General replacement of oil, the bearings and bearing cover cleaning with kerosene, then wash with gasoline. For rolling bearings, the grease should not exceed 70% of the bearing chamber volume.

    (6) wound rotor induction motor, check the contact between the brush and slip ring brush wear and sparks. If the spark is serious, you must promptly clean up the surface of the collector ring and the correction brush spring pressure.

(7) pay attention to maintaining the cleaning of the interior of the motor, do not allow water droplets, oil and other debris from falling into the interior of the motor. Air inlet and outlet of the motor must be kept free from obstruction.