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Overvoltage protection device

A protector and overvoltage technology, which is applied to emergency protection circuit devices, emergency protection circuit devices, electrical components, etc. for limiting overcurrent/overvoltage, and can solve problems such as endangering power production safety and rising lightning breakage accidents. , to ensure the safety of operation, reduce the tripping of line switches, and avoid lightning strikes and disconnection accidents.

Inactive Publication Date: 2013-04-03
JIANGSU AONENG ELECTRICITY CABLE ACCESSORIES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of electric power construction, overhead insulated lines have become a trend, which solves the contradiction between trees and wires and the protection requirements for human safety, but at the same time, lightning strike disconnection accidents are also increasing year by year, which has seriously endangered the safety of power production

Method used

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Such as Figure 1-2 Shown: an overvoltage protector, including an insulator 2 whose upper end is fixed on a transmission line 1, the insulator 2 is fixed on the transmission line 1 through a crimping plate 7, and the lower end of the insulator 2 is fixed by a bracket 3 and a lower end of a lightning arrester 4 The upper end of the arrester 4 is fixedly connected to one end of the drain ring 5, and the other end of the drain ring 5 is sheathed on the upper part of the insulator 2 in an open ring shape, and there is a gap between the annular inner wall of the drain ring 5 and the outer wall of the insulator 2 . The above-mentioned diversion ring 5 is horizontally arranged on the upper end of the arrester 4 and is located below the transmission line 1. In addition, a cross arm 6 is provided at the connection between the lower end of the support 3 a...

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Abstract

The invention discloses an overvoltage protection device which comprises an insulator (2). The upper end of the insulator (2) is fixed on a transmission line (1), and the lower end is fixedly connected with the lower end of an arrester (4) through a bracket (3); the upper end of the arrester (4) is fixedly connected with one end of a drainage ring (5); and the other end of the drainage ring (5) is provided with an opening and sleeved on the upper part of the insulator (2) annularly. Because the drainage ring is arranged between the arrester and the insulator, the series gap and the current limiting component formed between the drainage ring and the insulating transmission line can take effect cooperatively to cut off the power-frequency follow current effectively and instantaneously so that the insulating transmission line can be prevented from being struck by lighting and the frequency of tripping of a circuit switch due to lighting stroke can be reduced effectively. In addition, the overvoltage protection device can operate safely and reliably and is free from maintenance. Even if the drainage ring is damaged in the abnormal condition, the insulation coordination level of the transmission line can not be affected under the isolation action of the series gap, and the operation safety of the power system can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of power grid lightning protection, in particular to an overvoltage protector. Background technique [0002] Thunder and lightning is a weather phenomenon that often occurs in summer. Thunder disasters pose a huge threat to natural resources and the environment on which human beings depend. First of all, lightning produces scorching high temperature, and there is also lightning induction, which includes electrostatic induction and electromagnetic induction, which will generate induced high voltage. The harm of lightning to human beings is generally divided into three types: direct lightning strike, lightning wave intrusion and induced lightning strike. Direct lightning strike refers to lightning directly hitting buildings, trees, the ground, lightning protection devices or human body; lightning wave intrusion refers to the action of lightning on overhead lines and metal pipelines, and lightning waves may i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
Inventor 朱才良殷中华
Owner JIANGSU AONENG ELECTRICITY CABLE ACCESSORIES
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