How is the pollution resistance of composite insulators?

The overall design of rod type composite insulator has the advantages of compact structure, high quality and 1/10 of the weight of porcelain and glass insulators in the same grade. It is very convenient to transport and install. Suitable for dirty areas, high mechanical tensile load, large span and compact lines. The pollution lightning voltage is 30%-50% higher than that of porcelain and glass insulators of the same grade. Stable performance at -60 ℃ -- +200 ℃ ambient temperature; Non-breakdown design is adopted, and no need to proceed null detection.

(1) Excellent pollution performance. Silicone rubber shed/housing material surface is hydrophobic not only when it is new, but also when  the hydrophobicity temporarily lost in the operating conditions of the line, the hydrophobicity will recover. Water forms water droplets on the surface of the material, and the thin film of the silicone rubber liquid basically engulfs the pollution, thus inhibiting the dissolution of ionic substances in the water, providing a high surface resistance, reducing the leakage current, and improving the pollution flashover voltage. This property is maintained even as silicone rubber materials age. Thus, the reliability of power transmission is improved and the cost of cleaning and maintenance of insulators reduced obviously.

(2) Excellent resistance to ultraviolet light, corrosion resistance, no trace.

(3) The weight of 110kV / 100kN composite long rod insulator with small size and light weight, which is only 12% of as that of the corresponding 70kN porcelain insulator. Such a light weight greatly saves the installation and transportation costs, it tends to do not need a crane, and is especially suitable for the line emergency repair and transportation tools can not be close to the mountainous area line erection, maintenance;Can simplify the tower structure, allowing a large span (reduce the number of towers);And provides the condition for the development of compact line.

(4) The production and delivery time is much shorter than porcelain insulators

(5) No need zero insulation resistance detection.

(6) No brittleness feature, which is good for installation and transportation, makes it much more resistant to arc than porcelain insulator also