Structure and Advantages of Composite Insulator

Development History of the Composite Insulators

Composite insulators are made of silicone rubber material composite high-voltage insulators. The main products are rods and cross arm styles, 35KV/110KV / 220KV line as a drape and resistant sheets bearing insulation products, it is also used for 10KV line insulator product. There are different types of composite insulators, the silica composite insulators for substations, with good hydrophobicity, aging resistance, resistance to tracking and resistance to erosion resistance, high tensile strength and flexural strength. And the polymer insulator has high mechanical strength, good impact resistance, shock-proof and anti-brittle fracture performance, light weight, easy installation and maintenance, its upper and lower ends of the installation size is the same with the porcelain post insulators mounting dimensions and they can be used interchangeably.

Composite Insulator

Composite Insulator Structure

Composite insulators are also known as organic composite insulators, rubber post insulator or non-porcelain insulators, it is by organic synthetic material composed of a composite structure insulator, mainly mandrel with gold jacket and adhesive layer sheds. Gold with a synthetic insulator mechanical load transmission member and the mandrel assembly, which is together constitute the connecting member of the composite insulators. The structure is good or bad may influence the mandrel intensity of play and mechanical properties of the insulator. Sheds jacket the synthetic insulator outer insulation part, its role is to make composite insulators have a high enough moisture resistant flash and flashover of external insulation performance, protect the mandrel from atmospheric corrosion. The mandrel is a composite insulator of mechanical load bearing member, but it is also the main components of the inner dielectric.

Synthetic Insulators Advantages

Superior mechanical properties: the mandrel is made of epoxy glass fiber, its tensile strength was 1.5 times that of ordinary steel, high-strength ceramic 3 to 4 times axial tension is particularly strong and has a strong vibration absorption capacity, high performance of seismic damping porcelain insulators, 1/7 to 1/10. Stain-resistant flash performance: composite insulator is hydrophobic, synthetic insulators umbrella in the rain when the corrugated surface does not wet the water film is formed, was the drops of water like dripping, is not easy to have a conductive channel, the higher its pollution flashover voltage for same voltage levels porcelain insulator 3 times. Galvanic corrosion resistance is excellent: the surface of the insulator leakage flashover formation irreversibility deterioration tracking phenomenon, the general standard is not less than 4.5 (i.e. 4.5kV) and while the composite insulators is 6 to 7 class.

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