Performance Characteristics of Composite Insulators

Composite insulators can withstand the elements and have good self-cleaning properties in the elements so that contamination only needs to be checked every 4-5 years and less time is required for maintenance and disconnection. Due to the high tensile strength of the core rods, the composite insulators result in a very light overall weight. They weigh only 10-20% of the weight of a string of porcelain insulators of the same voltage class. Their length can be shortened by approximately 10% for the same voltage rating, which can significantly reduce transport and the labour of workers operating on site.

Composite insulators have many advantages but also disadvantages, such as loss of hydrophobicity, brittle and broken mandrels, lightning strikes and the risk of birds dropping, which can render composite insulators inefficient.

Due to the smaller diameter of the composite insulator shed, the minimum arc distance is less than that of a porcelain insulator string of the same length and the lightning withstand level is also less than that of a porcelain insulator string of the same length.

After a lightning strike, the only effect on the composite insulators is white lightning corrosion. There is no change in their insulating properties. However, attention must be paid to corrosion at the ends of the fittings.

The internal insulation distance of the composite insulators is almost equal to that of the external insulators and the construction is part of a puncture-proof insulator group, so there is no necessity to test zero-value insulators, which significantly reduces the insulation factor of the insulators. Operation and maintenance workload.

The composite insulators have a silicone rubber shed and sheath material with a low energy surface. Composite insulators have a large creepage distance, a small shed diameter and a hydrophobic and hydrophobic migrating surface. Even in wet and polluted environments, the shedding surface of the composite insulator does not form a continuous film of water. Therefore, it is better than porcelain insulators in terms of pollution resistance.

The main component of the composite insulator is the silicone rubber sheath. Silicone rubber is formed by the bonding of polymers of polydimethylsiloxane to organic oxygen compounds. The main chain is formed by a silicon-oxygen bond. Due to the high bond energy of the silicon-oxygen bond, it is thermally stable and can operate at temperatures of -100 to + 350°C. Silicone rubber has good resistance to ozone, whereas butadiene - propylene - propylene - butadiene rubber breaks easily, whereas at 150 ppm ozone pressure at room temperature, silicone rubber can last for several months without breaking.

Founded in 2010, Taporel Electrical (Jiangsu) Power Fitting Co., Ltd, held by Shaanxi Taporel Electrical Technology Co., Ltd. in Yangtze river delta economic belt, is a professional company specializing in R&D and manufacture of composite insulator fittings, power line fittings, and other fittings for transmission and distribution lines. It directly provides fittings for Taporel Electrical and Wishpower.

The above information is provided by the composite insulator manufacturer.