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Composite Insulator Manufacturing Process
Sep 04, 2018

Insulators are a special type of insulation control that can play an important role in overhead transmission lines. In the early years, insulators were mostly used in utility poles. Later, one end of the high-voltage high-voltage wire connection tower was hung with a large number of disk-shaped insulators. In order to increase the creepage distance, it is usually made of glass or ceramic, which is called an insulator. Insulators should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions. Otherwise, the insulators will not have a significant effect and will damage the use and operating life of the entire line.

Material selection The core material of the composite insulator is mainly made of glass fiber reinforced resin reticle or unsaturated polyester bonded glass fiber rod. Generally, the tensile strength of the core rod is required to be greater than 300kN.

Umbrella skirts and sheaths are generally made of the same material and are made of a polymer material or epoxy resin that is resistant to atmospheric corrosion and tracking. The polymer material is usually added to an EPM (ethylene propylene copolymer), EPDM (ethylene propylene rubber), silicone rubber, EVA (vinyl acetate vinegar) and other raw materials, adding an appropriate amount of ATH (aluminum trihydrate), UV absorber, Formulated with plasticizers. The polymer material has a polymer structure, low surface energy and strong water repellency. The international resistance to tracking and erosion is 4.5~6kV/6h.

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