How to Address Low Insulation Resistance in Explosion-Proof Contra-Rotating Axial Flow Main Fans?

What should you do when an explosion-proof contra-rotating axial flow main fan faces low insulation resistance? Proper maintenance is crucial for safe and efficient operation. Here is a step-by-step approach to resolving this issue:

Begin by checking if the winding has become damp or wet due to water exposure. If so, it is necessary to perform a heating and drying treatment to eliminate moisture. The presence of water can degrade insulation, reducing its resistance and posing safety risks, especially in explosion-proof applications where reliability is paramount.

Next, evaluate whether the insulation winding has aged. Conduct tests to determine its usability. If the winding is still deemed serviceable, cleaning, drying, and repainting with a suitable insulating material can extend its life. This preventive measure can help maintain the fan’s insulation strength and performance. On the other hand, if the insulation has deteriorated to a level where it cannot safely function, it should be replaced without delay to prevent potential hazards and ensure safe operation in environments that demand explosion-proof standards.

By promptly addressing low insulation resistance, you maintain the operational integrity and safety of the fan, safeguarding mining operations and minimizing downtime.