Insulating layer of aerial insulated line of insulator capable of being used as discharge medium

Abstract

The invention discloses an insulating layer of an aerial insulated line of an insulator capable of being used as a discharge medium. The insulating layer comprises a silicone rubber layer, an epoxy cylinder and a gap assembly, wherein the silicone rubber layer coats the outer side surface of the epoxy cylinder; the epoxy cylinder sleeves the outer side of the gap assembly; the gap assembly is a nonlinear resistor; and electrodes are arranged at the top and the bottom of the gap assembly separately. The insulating layer of the aerial insulated line of the insulator capable of being used as the discharge medium can be arranged between an upper armor clamp and a lower armor clamp of an insulator assembly, and are integrally molded and assembled together with the insulator. The insulating layer plays a normal function of a common insulator when no lightning strike risk occurs; once the lightning strike risk occurs, the nonlinear resistor is conducted through instantly loading overvoltage to the insulator; and current flows through the nonlinear resistor through the electrodes at two sides of the gap assembly and is guided to a ground wire, so that the risk of a dangerous accident due to the fact that a whole power grid is hit by overvoltage is reduced.

Description

technical field [0001] The invention relates to an insulating layer of an insulator and an overhead insulated wire which can be used as a discharge medium in the field of electric power engineering. Background technique [0002] With the vigorous development of my country's electric power industry, it is an inevitable trend for the construction of urban overhead lines to replace bare conductors with overhead insulated wires. It is outstanding that once a lightning strike is encountered, it is easy to form an instantaneous overvoltage, which will affect the entire power grid, bring risks to the safety of residential and production electricity consumption, and even cause large-scale power outages. At present, many manufacturers have developed anti-lightning disconnection protection devices, but there are many problems, such as poor protection reliability, complicated construction, and inconvenient maintenance. Contents of the invention [0003] The purpose of the present inv...

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Problems solved by technology

[0002] With the vigorous development of my country's electric power industry, it is an inevitable trend for the construction of urban overhead lines to replace bare conductors with overhead insulated wires. Once struck by lightning, it is very easy to form an instantaneous overvoltage, which will affect the entire power grid, bring risks to the safety of residential and production electricity consumption, and even cause large-scale power outages

At present, many manufacturers have developed anti-lightning disconnection protection devices, but there are many problems, such as poor protection reliability, complicated construction, and inconvenient maintenance.

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