What Should I Do If Epoxy Resin Insulators Suffer From Flashover And Their Insulation Performance Deteriorates?

Since high voltage standoff insulators is hung outdoors for a long time, a lot of dirt will adhere to its surface, resulting in a decrease in insulation performance and the formation of dirty flash. Dirt flash will destroy the insulation of high voltage epoxy and further reduce its insulation performance, so it needs to be cleaned with a special cleaning agent. However, there are many types of epoxy resin insulator cleaning agents on the market, with uneven quality, and lack of products with excellent performance and environmental protection standards. Today, the author will take you to see a new type of insulating environmentally friendly cleaning agent.

First, let's look at the cause of high voltage epoxy resin dirty flash. There are only two factors: the cause of high voltage standoff itself and the cause of the external environment. The cause of the insulator itself is whether its leakage distance is sufficient? Can the material meet the withstand voltage requirements? Taking the latter as an example, if the withstand voltage layer of the insulator is only a few or a dozen cement casting layers thick, then once a zero-value insulator appears, the withstand voltage level will be reduced, which will then affect the change of leakage current and cause dirty flash.

Here we will not discuss the causes of the insulator itself, but look for the causes of the external environment, that is, the degree of pollution and atmospheric humidity in the space where the insulator is located.

One is the surface pollution of the insulator caused by atmospheric pollution. The contact network insulators are exposed to the open air and are inevitably contaminated by atmospheric dust. Dirt makes the originally smooth surface rough and easily causes discharge. If the dirt is composed of dust, acid, alkaline and metallic conductive substances, it will be "adding insult to injury", shortening the discharge distance and more likely to cause discharge;

The second is the meteorological conditions that can make the accumulated dirty substances fully damp. Under dry meteorological conditions, insulators with dirty surfaces still have high insulation strength. However, under meteorological conditions such as heavy fog, condensation, and drizzle, the electrolyte components in the dirt layer will fully dissolve in the water, forming a conductive path on the surface of the insulator, greatly reducing the insulation strength, and causing insulator flashover under normal operating voltage.