The Electrical Faults Of Insulators Include Flashover And Two Types Of Breakdown.

In order to prevent dust and other dirt from adhering to the surface of dead end insulators, forming a path that is broken down by the voltage at both ends of dead end suspension insulators, that is, creepage. Therefore, the surface distance, that is, creepage distance, is increased. The distance of discharge along the surface of polymer deadend insulator, that is, the leakage distance, is called creepage distance. Creepage distance = surface distance/system maximum voltage. According to the degree of dirt, the creepage distance is generally 31 mm/kilovolt in heavy pollution areas. The voltage size can be directly judged by the number of porcelain dead end insulators. Generally, 500kv has 23; 330kv has 16; 220kv has 9; 110kv has 5; this is the minimum number of suspension insulator, and the actual suspension composite insulator will have one or two more. 500kv transmission lines basically use four-split conductors, that is, one phase has four