Electrical products sometimes inevitably encounter issues such as leakage current or electrical charge. Explosion-proof motors can also exhibit these problems, typically occurring in the motor’s outer casing. So, what causes these faults, and how should they be addressed and resolved?

1. Cause of the problem: The power cord and ground wire have been connected incorrectly. This type of issue usually arises from operational errors during the installation and use of explosion-proof motors. The solution is to reconnect them properly.

2. Cause of the problem No. 2: Winding dampness and insulation aging. This type of issue primarily arises when, during manufacturing and operational maintenance, the damp and aged parts of explosion-proof motors are not replaced. If only dampness is present, the windings can be dried out; however, if the insulation has aged, it must be replaced.

3. Cause of the problem No. 3: Grounding of the lead wire. This type of issue generally arises from errors during manufacturing and maintenance. To resolve the problem, either wrap or replace the lead wire, remove any burrs or sharp edges around the lead wire, and install a protective sleeve for the lead wire (such as a fiberglass tube or a rubber protective ring at the motor’s entry point).

4. Cause of the problem No. 4: The coil ends come into contact with the end cover or the machine base. If this is the issue, it could be due to a defect in either the design or the manufacturing process. The corresponding solution is as follows: First, wrap and insulate the winding at the point of contact, then apply paint. Next, place an insulating pad at the end cover or machine base; before placing the pad, apply impregnating varnish to the outer surface. Finally, bake the assembly to ensure that the insulation becomes integrated with the end cover or machine base.