What is Composite Insulator?

A composite insulator is a special insulation control component that plays an important role in overhead transmission lines. There are many types of polymer insulators.

What is Composite Insulator Made of?


The Composite insulator is also called the synthetic insulator, non-ceramic insulator, polymer insulator, rubber insulator, etc. The main structure is generally composed of an umbrella skirt, FRP core bar, and end fittings. The umbrella skirt is generally made of organic synthetic materials, such as ethylene propylene rubber, high temperature vulcanized silicone rubber, etc.; the FRP core bar is generally reinforced with glass fiber and based on oxidized resin; the end fittings are usually carbon steel or carbon structural steel coated with hot zinc aluminum.

Types of Composite Insulator (Types of Insulators And Their Applications):


The Composite insulator can be divided into composite suspension insulator, line post composite insulator, pin type composite insulator, post composite insulator, composite railway insulator, and composite hollow insulator.

Advantages of Composite Insulator:


The Composite insulator is small in size, light in weight, light in structure, easy to transport, easy to install and easy to maintain.

The composite insulator has good fouling resistance and strong fouling flash voltage resistance. Its wet withstands voltage and fouling resistance voltage is 2 to 2.5 times that of porcelain insulators with the same creepage distance. No need for cleaning and safe operation in heavily polluted areas.

Polymer insulators have superior electrical properties and high mechanical strength. Polymer insulators have good tensile and flexural strength, 2 times higher than ordinary steel and 8-10 times higher than high-strength porcelain materials, which effectively improves the reliability of safe operation.

It has good waterproof performance. Its overall structure prevents internal insulation from moisture. It does not require preventive insulation monitoring tests or cleaning, thus reducing the workload of daily maintenance.

Polymer insulators have good sealing performance and high resistance to electrical corrosion.

Polymer insulators have high impact and shock resistance, and good resistance to brittleness and creep.

Polymer insulators have high bending strength and high torsional strength. It enables them to withstand internal pressure. And can be used in combination with porcelain insulators and glass insulators. Changsha rich power company is a composite insulator manufacturer in China. We can produce all types of polymer insulators, line suspension insulators, and line post insulators…

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