The basic information of suspended porcelain composite insulator used to support and insulate the wire is called porcelain composite insulator. The porcelain composite insulator is composed of ceramic parts, steel caps, steel feet, and composite silicone rubber. Due to the good anti-pollution ability of porcelain composite insulators, the number of pieces used can be reduced to reduce the length of the string, which can reduce the height of the iron tower and its own light weight. The use of large-tonnage porcelain (glass) composite insulators is of greater significance in the construction of UHV projects.
1. Solved the pollution flashover problem of porcelain and glass insulators
With the rapid development of economic construction, atmospheric and industrial environmental pollution is also increasing. Under the humid weather conditions of rain, fog, frost, dew, etc. in nature, the soluble substances in the dirt on the surface of porcelain and glass insulators will gradually dissolve in water, and a water film with certain conductivity will form on the surface of the insulator . If the insulator is relatively dirty and the surface of the insulator is sufficiently damp, a strong partial discharge phenomenon will occur, which may easily lead to pollution flashover accidents.
2. Solve the "brittle break" problem of ordinary rod-shaped composite insulators
According to relevant information: In the mechanical damage of organic composite insulators, the "brittle break" of the core rod accounts for 60% of the core rod fracture accidents that have occurred, and 35% of all mechanical accidents. The "brittle break" of the mandrel has become the most serious accident in the current organic composite insulator.
3. Solve the problem that the composite insulator can not be used for tensile string
At present, my country's composite insulators are not widely used in tensile strings, mainly because of concerns about the mechanical strength of composite insulators. After all, my country's synthetic insulators have less operating experience than foreign countries. Especially after the organic composite insulator breaks on the high-voltage line, some of the composite insulators used on the tensile insulator strings are replaced with porcelain or glass insulators to ensure stable and reliable mechanical strength.