What is Composite Insulator?
The insulator is playing the role of insulation and mechanical fixed electrical devices. Composite insulator divided into many kinds, by the use of main insulation material, porcelain, glass and resin insulator single insulating materials and polymer insulator, composite insulator, composite insulator composite insulator. According to the voltage level is high voltage insulators (Ur>1kV) and low voltage insulators (Ur = 1kV).According to the voltage types of AC and DC insulators the breakdown possibility points can breakdown insulator and not breakdown insulator (via solid insulating material in the short stroke in the distance at least by the insulator outside air to the shortest distance of insulator flashover half called A type insulator. The solid insulating material in the short stroke in a distance less than the outside air through the insulator flashover distance the shortest half of the insulator is called B type insulator).According to the polymer insulators structure, a needle type, column type, disc suspension, rod, butterfly, needle type support etc..An 1100kV UHV power transformer bushing, a total length of 13.5m, weighs seven tons. A large casing price can buy a plane, so it is. From the molding, trimming, drying to burn the Chengdu is difficult, the manufacturing equipment is a big problem.  Useful Composite Insulator with Daily Living
Electrical wiring or conductors are insulated with nonconductive material to help reduce and prevent current leakage. Many materials such as polymer insulators are used to insulate conductors as well as electrical junctions. Most residential and commercial electrical contractors or do-it-yourself homeowners will encounter only a few types of wire insulation material. These insulators follow industry standards and adhere to the National Electric Code for residential and commercial wiring. These common insulators are used for heat and water resistance as well as to prevent current leakage and provide a safe environment for conductors.
Disadvantages of Composite Insulator
1, it is easy to be aging and broken 2, inner insulation easy to be breakdown. 3, potential distribution is uneven 4, tend to occur unexplained flashover, partial discharge wind, lightning discharge 5, tend to attract the birds pecking.
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