advantages of suspension insulator

What are the characteristics of suspension rod insulators:

(1) High strength and light weight. The strength-to-weight ratio of Composite insulators is high, that is, the specific strength is high. Its high mechanical strength originates from the excellent mechanical properties of FRP mandrels. At present, the tensile strength of FRP rods that are widely used can reach more than 1000MPa, and the density of the mandrel is only about 2g/cm3, so its specific strength is very high. About 5 to 10 times that of high-quality carbon steel. At the same voltage level, the weight of composite insulators is only 1/7~1/10 of that of porcelain insulators.

    (2) Wet flashover pollution flashover voltage is high. The hydrophobicity of the low-energy surface of organic composites is the main reason for the excellent resistance to moisture and dirt of composite insulators. Under severe weather conditions such as heavy fog, light rain, dew, melting snow, and melting ice, separate water droplets are formed on the surface of the composite insulator instead of a continuous water film. The local arc, the local arc is also difficult to further develop and lead to external insulation flashover. After running for a period of time, after the surface of the Composite insulator is contaminated, the hydrophobicity can migrate to the surface of the contamination layer, which is unique to the silicone rubber material. Under the same pollution degree, its pollution flashover voltage can reach more than twice that of the insulator with the same leakage distance.

The equivalent diameter of ordinary rod-shaped suspension composite insulators is much smaller than that of ordinary suspension ceramic insulators and pillar insulators, which is also an important reason for its excellent pollution resistance. Under unfavorable conditions, the hydrophobicity may decrease or be lost due to the influence of electrical and environmental stress, but its equivalent diameter will not become thicker, so the pollution flashover voltage will still maintain a high level.
(3) Easy to operate and maintain. The excellent pollution resistance of the organic external insulation improves the reliability of the operation of the power system. It does not need to be cleaned regularly like porcelain and glass insulators in polluted areas, and there is no problem of zero value detection of ordinary suspended ceramic insulators, which greatly reduces the pollution of insulators in polluted areas. Operation and maintenance costs.



    (4) It is not easy to break and prevents accidents. The composite insulator has strong impact resistance, which greatly reduces accidental damage during installation and transportation, and can effectively prevent damage from human factors such as gunshots.