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Composite Insulator

Composite insulator is a special type of insulator composed of high-strength fiberglass rods and polyester resin impregnated materials. The advantage of this kind of insulator is that it has excellent high temperature resistance, corrosion resistance and anti-aging properties, which can effectively improve the safety and reliability of transmission lines. 


At the same time, composite insulators are light in weight, small in size, easy to install and maintain, and can effectively reduce the operating costs of transmission lines. In addition, the mechanical and electrical properties of composite insulators are superior to traditional porcelain insulators, which can effectively improve the safety and reliability of transmission lines.

Features of Composite Insulator

  • A composite insulator, also called a dielectric or nonconductor, is a material that resists the flow of electric current. This type of silicone rubber material is used in parts of electrical equipment intended to support or separate electrical conductors without passing current through itself. The term is also used more specifically to refer to insulating supports that attach electric power transmission wires to utility poles or pylons.


  • Composite insulators are less costly, lighter in weight, and have excellent hydrophobic capability. This combination makes them ideal for service in polluted areas. However, these materials do not yet have the long-term proven service life of glass and porcelain.

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