How to deal with the leakage of motor
After damping treatment to reduce the insulation resistance; the motor overload for a long time harmful gas is corroded; the metal foreign matter intrudes into the winding, damaging the insulation. When the stator winding is rewound, the insulating layer will damage the core
The end of the winding contacts the base of the end cover; the friction between the stator and the rotor will cause the insulation burn; the insulation damage of the conductor will contact with the shell; the over-voltage (such as lightning) will cause the insulation damage.
Usually use a megger to check, according to different grades, use different megger to measure the insulation resistance of each group of resistance. If the reading is zero, the winding is grounded, but the motor insulation is wet or broken down due to an accident.
It is necessary to make judgment based on experience. Generally speaking, the pointer swings at "0" and can be considered to have a certain resistance value. The insulation resistance to ground shall be greater than 1 megohm (100 V motor).
The solution to the motor leakage problem of Dalan oil pump motor is as follows:
When the winding is wet, the ground wire shall be dried first. When cooled to about 60-70 ° C, bake first and then dry.
When the insulation layer at the end of winding is damaged, please re coat the insulation layer at the grounding point, and then dry it.
When the winding ground point is in the slot, rewind the winding or replace some winding components.
If the insulation resistance does not meet the requirements after drying and treatment, the coil needs to be rewound.