A line lightning protection device for protecting insulators from lightning overvoltage hazards

Abstract

The invention discloses a line lightning protection apparatus for protecting an insulator from harm of lightning stroke overvoltage. The line lightning protection apparatus for protecting an insulatorfrom harm of lightning stroke overvoltage includes an insulator, a lightning arrester body, a first connection assembly, and a second connection assembly, wherein the lower part of the insulator is arranged on a pole cross-arm and the upper part of the insulator is used for supporting a wire; the lightning arrester body is in parallel connection with one side of the insulator; the first connection assembly is used for connecting the lower part of the lightning arrester body in a turnable manner, relative to the insulator; the second connection assembly is used for connecting the upper part ofthe insulator with the lightning arrester body in a releasable manner; the second connection assembly at least includes a fault action indicator which is arranged in the upper end of the lightning arrester body, and a connection line which connects the ejection unit of the fault action indicator with the insulator; and the lightning protection apparatus is provided with a fixed state and a faultoverturn state. The line lightning protection apparatus for protecting an insulator from harm of lightning stroke overvoltage can automatically overturn after the lightning arrester body fails, can beseen under the pole, and can remove the insulation weak points of the line as the short circuit part of the lightning arrester body is cut off.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a line lightning protection device on a line tower for protecting insulators from lightning overvoltage hazards. Background technique [0002] The function of the lightning arrester for electric power is to let the lightning current pass through and limit the continuous flow of power frequency, so as to protect the insulation of the equipment from the hazard of lightning strike and overvoltage, and the line will not trip and lose power. [0003] If the non-gap arrester is damaged during use, the short circuit of the non-linear resistor will form a continuous grounding fault of the power frequency voltage, which will affect the power supply and cause a large maintenance workload. Therefore, the lightning protection of overhead distribution lines usually does not use non-gap arresters, but uses arresters with outer string gaps (composed of two parts: out...

AI Technical Summary

Problems solved by technology

[0007] (3) If the lightning current is too large, the arrester body will be damaged when it cannot bear it. After the lightning current is released, the non-linear resistor will cut off the continuous flow at power frequency; , eventually causing the overcurrent action of the line relay protection, and the switch trips

Because the body of the arrester is stuck upward on the conductive elastic pressure plate of the upper bracket, and is restricted by the support seat downward, at this time, if the disconnector is provided with a directional action, the impact force will only damage the entire mechanical structure

[0013] (2) The disconnector of the drop arrester is external

It is used at the upper end of the lightning arrester (high voltage), unless special measures are taken, there is a problem of safety insulation of the disconnected line live

[0025] (2) Because both the disconnector and the arrester are cylinders, the axis of the disconnector and its upper and lower mounting bolts (screw holes) coincides with the axis of the arrester body, otherwise it cannot be installed and used

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