A shielding hoop device for external leakage of lightning arrester that is convenient for live replacement

Abstract

The invention discloses a lightning arrester external leakage shielding hoop device which is convenient for live replacement, belongs to the technical field of electric equipment, and comprises a strip-shaped hoop. Both ends of the hoop are provided with through holes, and one end of the hoop is arranged in parallel. First open slots, first teeth are provided between adjacent first open slots, a number of second open slots are arranged side by side at the other end of the hoop, second teeth are provided between adjacent second open slots, first The groove depth direction of the opening groove and the groove depth direction of the second opening groove are both perpendicular to the length direction of the hoop, and the opening orientation of the first opening groove is opposite to that of the second opening groove, and the groove depth of the first opening groove is the same as that of the second opening groove. The groove depth of the second opening groove is half of the width of the hoop. The hoop device provided by the invention is easy to install and does not need to use fasteners to fix the hoop. Electric maintenance personnel can operate the hoop through other tools, which effectively improves the safety of operation without using power-off operations. .

Description

technical field [0001] The invention relates to the technical field of electric power equipment, in particular to an arrester external leakage shielding hoop device which is convenient for live replacement. Background technique [0002] At present, lightning arresters with external leakage shielding counters are generally fixed and installed on the outside of the porcelain sleeve with hoops. Since the hoops have been in the outdoor environment for many years, after being exposed to wind, sun, rain, fog and snow, the speed of aging and corrosion is obviously accelerated. It is easy to cause the hoop to break and fall off, and the function of the hoop to shield the leakage current fades or is lost. The relevant departments of the electric power need to replace and eliminate the defect in time. [0003] When there is no overvoltage, the leakage current value of the arrester is very small, generally not more than 1mA. As the arrester works for a long time, coupled with the infl...

AI Technical Summary

Problems solved by technology

As the arrester works for a long time, coupled with the influence of external temperature, pollution, humidity and other factors, the performance of the valve inside the arrester will decline, and the leakage current value of the arrester will increase.

If the hoop is replaced with electricity, there will be a major safety hazard in consideration of the leakage current of the arrester and the short safety distance from the live parts on the upper end of the arrester.

If there is a power outage to replace the hoop, especially for the three-side surge arrester of the 220kV main transformer, it is necessary to stop a main transformer. In this way, the power outage range is large, the switching operation is cumbersome, and it takes a long time for power outage work, which seriously affects the The normal operation of the power grid system will bring certain economic losses and inconvenience to the society, enterprises and residents

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