power line insulator
Power line insulator is used to support and fix bus and charged conductor,and ensure there is enough distance and insulation between the charged conductors (or conductors) and the earth. Power line high voltage insulator should have adequate dielectric strength and moisture resistance.
Power line insulator is a special kind of insulation control, and play an important role in the overhead transmission lines. Power line insulator was mainly used for poles in the early years, then slowly developed to be used in high voltage wire tower. A lot of disk-shaped insulators, which usually made of glass or ceramic, are hung at the end of the tower to increase the creepage distance.
Power line insulator should not lead to a failure when environmental and electrical load conditions change, or else there won't have a significant role in the insulator and it will damage the whole line of use and operating life. Insulator in overhead transmission lines with two basic role, namely support wire and prevent the current back, and the two effects must be guaranteed.
According to the structure,power line insulator can be divided into the post insulator, suspension insulator, pin type insulator, butterfly insulator, strain insulator, anti-pollution insulator and bushing insulator.
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