Key points for daily maintenance and inspection of electric motors
Release Time：
2024-10-21
The key to daily maintenance and inspection of electric motors is to detect abnormal equipment conditions early, handle them promptly, and prevent accidents from escalating. Maintenance personnel can detect abnormal phenomena based on the actions and signals of relay protection devices, and can also rely on their experience to determine the signs of accidents.
The key to daily maintenance and inspection of electric motors is to detect abnormal equipment conditions early, handle them promptly, and prevent accidents from escalating. Maintenance personnel can detect abnormal phenomena based on the actions and signals of relay protection devices, and can also rely on their experience to determine the signs of accidents.
By visual inspection, the following abnormal phenomena can be detected: whether the external fasteners of the motor are loose, whether the components are damaged, and whether there is oil or corrosion on the surface of the equipment; Are there any discoloration, burn marks, or smoke marks at the contact points and connections of the electric motor.
The reasons for these phenomena are due to local overheating of the motor, poor conductor contact, or burnt windings; Is the instrument reading normal.
If the voltmeter shows no indication or is abnormal, it indicates that the power supply voltage is unbalanced, the fuse is blown, the three-phase resistance of the rotor is unbalanced, single-phase operation, poor conductor contact, etc.
If the ammeter reading is too high, it indicates motor overload, bearing failure, winding turn to turn short circuit, etc.
The reasons for the motor stopping include power outage, single-phase operation, low voltage, low motor torque, excessive load, large voltage drop, bearing burnout, mechanical jamming, etc.
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