1. The ground wire is connected to the wrong power source. There are four cores in the cable of the submersible pump. Be careful not to connect the ground wire as a power cord.
2. Submersible pump mechanical seal damage and leakage. Often use megger to check the submersible pump insulation resistance, the occurrence of insulation resistance is reduced in time to take maintenance measures, it will not happen to burn the motor.
3. After the cable is damaged. Always check the insulation resistance of the submersible pump.
4. Impeller stuck. When the impeller is locked, the current increases over the rated value for a long time, and the stator windings of the submersible pump will burn out soon.
5. Stator windings at both ends of the shell. Winding to ground breakdown.
6. Submersible pump “open”, “stop” too often.
7. Submersible pump dehydration running time is too long. Submersible pump dehydration running time can only be about 1 minute time, a long time, the pump due to poor heat and temperature rise.
8. Lack of work. In the absence of work, the submersible pump is generally in the braking state, the current is much larger than the rated value, when the submersible pump winding temperature increases, if last for a long time, it will burn the stator windings.
