Grounding fault of stator winding is a dangerous accident, as insulation damage between stator winding and iron core or shell can endanger human life and cause damage to related equipment. The flow components of the corrosion-resistant self-priming pump are all made of the world's best corrosion-resistant "Plastic King". The pump body is made of a metal shell lined with perfluoroethylene propylene, and the pump cover and impeller are made of metal inserts wrapped in fluoroplastic and sintered as a whole. The isolation sleeve is made of special materials with high mechanical properties, eliminating the magnetic eddy current phenomenon that exists in ordinary magnetic pumps. Self priming pumps have the advantages of compact structure, easy operation, stable operation, easy maintenance, high efficiency, long service life, and strong self-priming ability. There is no need to install a bottom valve in the pipeline. Before operation, it is only necessary to ensure that a certain amount of liquid is stored in the pump body. Different liquids can use self-priming pumps made of different materials. The main reasons for the grounding fault of the stator winding of the anti-corrosion self-priming pump are as follows: 1. Self priming pumps have the advantages of compact structure, easy operation, stable operation, easy maintenance, high efficiency, long service life, and strong self-priming ability. There is no need to install a bottom valve in the pipeline. Before operation, it is only necessary to ensure that a certain amount of liquid is stored in the pump body. Different liquids can use self-priming pumps made of different materials. The stator winding loses its insulation function due to moisture. When the anti-corrosion self-priming pump operates underwater, the stator winding of the dry submersible motor or oil filled submersible motor will become damp, and the insulation performance of the stator winding will gradually decrease until it completely loses its insulation function. Long term overload of corrosion-resistant self-priming pumps can cause insulation aging of the stator winding. Long term low voltage operation, long-term overload, high current, and high temperature rise can gradually cause insulation aging of the stator winding. Three. The stator and rotor rub against each other. Poor coaxiality between the stator iron core and rotor iron core of the corrosion-resistant self-priming pump or damaged bearings can cause friction between the stator and rotor. The friction part between the stator core and the rotor is heated by friction, and the slot insulation is burnt, resulting in damage to the coil insulation and grounding fault of the stator winding. 4. Manufacturing quality issues during the manufacturing process, such as improper wire embedding technology or poor wire embedding quality of the stator winding, compression at the corners between the straight part and the slot coil end, and damage to the slot insulation; Part of the slot insulation is not properly wrapped, and the slot insulation is damaged. The slot wedge is in direct contact with the conductor; After the slot wedge becomes damp, the insulation resistance of the winding decreases. If the insulation of the slot is severely damaged and the bare copper part of the wire comes into contact with the iron core and the casing, it will cause a stator winding grounding accident.