An insulator is a special insulation control that plays an important role in the overhead transmission line.Early years insulator for more poles, slowly development in high type high voltage wires to hang a lot at the end of the disc insulators, it is to increase the creepage distance, usually made of glass or ceramic call insulator.Insulator should not change due to environmental and electrical load conditions lead to a variety of electrical and mechanical stress and failure, or else there won’t have a significant role in the insulator, will damage the whole line of use and operating life.Insulator role
One end of the high voltage wires hung up the many disc insulators, in order to increase the creepage distance, it is usually made of glass or ceramic call insulator.
In order to prevent dust and other impurity in the adhered on the surface of the insulator, forming pathway was breakdown voltage on both ends of the insulator, namely creepage. Therefore, increasing the surface distance, namely the creepage distance, the distance along the surface of the insulating discharge the leakage distance call creepage distance. Distance = surface distance/high voltage system. According to different degree of filth, heavy polluted areas generally adopt the creepage distance is 31 mm/kv.