The national regulation for motor maintenance is that the motor should be overhauled once for a long time operation (personal understanding of long time operation means 12 hours × 365 days).Overhaul contents: replacement of bearings, oil injection, measurement of insulation resistance between three phases and between phases to ground, etc. Generally, if the frequency of unit motor is not high, it can be flexibly mastered according to the actual situation. From December to August, open the terminal covers at both ends to inject oil and tighten the screws at each part.Shake the ground resistance and make maintenance records.
