The composite suspension insulator is composed of an iron cap, a porcelain tube sleeve (suspension or silicone rubber) and a steel foot (conductive rod), and is cemented with cement adhesive to form a whole. This product adopts the most advanced cylindrical head structure in the world, which is characterized by a small head size. Light weight, high strength and large creepage distance. Can save metal materials and reduce line cost. In order to meet the needs of live working, the domestic traditional structural shape is adopted on the brim.
Composite hanging edge has the characteristics of zero-value self-breaking. As long as it can be observed on the ground or on a helicopter, there is no need to detect the pole piece by piece, which reduces the labor intensity of workers.
Introduced production line products, the annual operating self-breaking rate is 0.02-0.04%, which can save the maintenance cost of the line. Good arc resistance and vibration resistance
In operation, the new surface of the glass insulator subjected to lightning burns is still a smooth glass body, and has a toughened internal stress protection layer. Therefore, it still maintains sufficient insulation and mechanical strength.
On the 500kv line, there have been many disasters caused by the conductor crawling on the ice. The composite suspension insulator after the conductor dances has been tested, and the electromechanical performance has not been attenuated.
Good self-cleaning performance and not easy to aging
According to the electric power department, it is generally reported that glass insulators are not easy to be stained and easy to clean. The glass insulators running on the southern line are washed clean after rain.
Take regular sampling of the glass insulators on the lines in typical areas to determine the mechanical and electrical properties after operation. Thousands of accumulated data indicate that the electrical and mechanical properties of the glass insulators after 35 years of operation are basically the same as those at the time of shipment, and there is no aging phenomenon.
The main capacity is large, the voltage distribution in the series is uniform, and the dielectric constant of the glass is 7-8, so that the composite insulator has a large main capacitance and the voltage distribution in the series is uniform, which is helpful to reduce the voltage experienced by the insulator near the wire side and the ground side In order to achieve the purpose of reducing radio interference, reducing corona loss and extending the life of glass insulators, operating practice has proved this.