Anti-thunder and anti-icing pin type composite insulator for 10 kV transmission line

Abstract

The invention discloses an anti-thunder and anti-icing pin type composite insulator for a 10 kV transmission line. The composite insulator comprises a mandrel, a composite insulator assembly, an insulating shed housing, a trunking fitting and a steel leg fitting, wherein the composite insulator assembly comprises a lower conductive heel block, a metal oxide resistor disc group and an upper conductive heel block which are sequentially arranged on the mandrel in a sleeving manner and are tightly attached; the composite insulator assembly is wrapped with the insulating shed housing; an insulating layer is arranged between the composite insulator assembly and the insulating shed housing; the trunking fitting penetrates through the insulating shed housing and is in threaded connection with the upper conductive heel block; the steel leg fitting penetrates through the insulating shed housing and is in threaded connection with the lower conductive heel block; two ends of the mandrel are connected with the trunking fitting and the steel leg fitting respectively. The anti-thunder and anti-icing pin type composite insulator for the 10 kV transmission line has the advantages of good anti-thunder and anti-icing effects, simplicity and convenience in installation, long service life, facilitation of reconstruction of a conventional electric transmission line and the like.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a lightning-proof and ice-proof pin-type composite insulator for a 10kV transmission line. Background technique [0002] The medium and low-voltage distribution network lines are the lines with the largest number, the longest cumulative length, and the most closely related to users in the power grid. Many distribution network lines extend to some mountainous areas with complex terrain and high cold climate. In these areas with special geographical environment, when encountering severe weather, the lines are prone to lightning tripping and lightning disconnection accidents, or large-area insulators are covered with ice and bridging. The leakage current increases, seriously affecting the continuous and safe power supply of the distribution network. [0003] For the lightning protection of the existing distribution network lines, there is currently a method of instal...

AI Technical Summary

Problems solved by technology

Many distribution network lines extend to some mountainous areas with complex terrain and high cold climate. In these areas with special geographical environment, when encountering severe weather, the lines are prone to lightning tripping and lightning disconnection accidents, or large-area insulators are covered with ice and bridging. Leakage current increases, which seriously affects the continuous and safe power supply of distribution network

[0003] For the lightning protection of the existing distribution network lines, there is currently a method of installing arc striking devices at both ends of the insulator to reduce the accidents of lightning strikes and disconnection, but it is still difficult to eliminate the tripping and power failure caused by multi-phase short circuits after lightning strikes the lines; The method of paralleling the line surge arrester next to the network line insulator, but this will greatly increase the installation difficulty and construction cost

In addition, the existing line lightning arresters for distribution networks have the disadvantage of simple outer insulating umbrella structure. Most of the umbrella skirts have equal umbrella diameters or only small and large umbrella diameters. insulation level drop

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