In order to prevent dust and other dirt from adhering to the surface of the High voltage cable clamp, the formation path is broken by the voltage across the High voltage cable clamp, that is, creepage. Therefore, increasing the surface distance, that is, the creepage distance, the distance discharged along the insulating surface, that is, the leakage distance is called Crawling distance. Crawling distance = surface distance / system * high voltage. Depending on the degree of contamination, heavy creep areas generally use a creepage distance of 31 mm / kV.
The effect of the zero or low value High voltage cable clamp. The insulation of the line conductor depends on the High voltage cable clamp string. Due to manufacturing defects or external influences, the insulation performance of the High voltage cable clamp will continue to deteriorate, when the insulation resistance is reduced or zero. It is called low value or High voltage cable clamp. We have tested the line, and the ratio of zero or low value High voltage cable clamp is as high as 9%.
