High-voltage test device for lightning arrester of power transmission line

Abstract

The invention relates to a high-voltage test device for a lightning arrester of a power transmission line. The high-voltage test device comprises a telescopic insulating rod, a wire clamp and a low-insulation direct-current (DC) shielding high-voltage lead penetrating into the telescopic insulating rod, wherein a male butt plug and a female butt plug are respectively manufactured at two ends of the low-insulation DC shielding high-voltage lead, the male plug end is fixed at one end of the telescopic insulating rod, and the female plug end is connected to a tested lightning arrester through a telescopic lead in the insulating rod and a male plug of the wire clamp; the wire clamp comprises a large clamp and a small clamp, the large clamp is connected with a wire core of the shielding wire, and the small clamp is connected with the shielding of a shielding wire. The device has increased the commonality that same equipment is applicable to multiple scenes as well as has reduced the workload of the test personnel; the work efficiency is improved, the risk that the test personnel falls at high altitude when repeatedly working on a platform edge on a shaft tower is avoided at the same time, and most importantly, the fall off of the high-voltage lead in the test process can be avoided, thereby guaranteeing the personal safety of the test personnel and avoiding the damage of the test equipment.

Description

Technical field [0001] The invention belongs to the technical field of high-voltage testing, and relates to a lightning arrester, in particular to a high-voltage test device for a lightning arrester for a transmission line. Background technique [0002] The DC reference voltage and leakage current test of the arrester are the most important handover, routine and diagnostic test items of the arrester. It is of great significance for the discovery of moisture, aging, and the existence of serious partial discharges in the arrester's internal insulation. [0003] Since the DC reference voltage of lightning arresters is generally relatively high, for example, the DC reference voltage of each section of a 220kV arrester is generally around 150kV, while the DC reference voltage of each section of a 500kV arrester can generally reach about 200kV. At present, the high-voltage lead insulation of the DC reference voltage and leakage current test of the arrester is generally low. Therefore, ho...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to keep a sufficient safe distance between the high-voltage lead wire and the grounding part of the tower, the insulating support porcelain bottle and the cable head, etc., it is necessary to repeatedly adjust the position and wiring arrangement of the high-voltage lead wire, and this work must be carried out for each phase arrester test, which is It greatly increases the workload of the test personnel, reduces the work efficiency, and is not conducive to the timely operation of the equipment;

[0005] 2. At present, when arranging DC high-voltage leads, insulating tape is usually used to suspend the high-voltage leads on the grounded metal parts or to wind the high-voltage leads on the insulating porcelain bottle and then adjust the direction of the high-voltage leads. Because the temporary hoisting and fixing with insulating tapes is not reliable enough , the high-voltage lead wire wound on the insulating porcelain bottle is also easy to fall off. If the high-voltage lead wire falls off during the test, it will easily cause personal injury and equipment damage;

[0006] 3. When using insulating tape to hoist the high-voltage lead wire or wind the high-voltage lead wire on the insulating porcelain bottle, the tester often needs to stand on the edge of the platform above the tower to work, which undoubtedly increases the risk of the tester falling from a high altitude, especially The test work of the lightning arrester on the pole tower is often carried out at night, so the test personnel's vision will be blurred, and the energy will be more easily dispersed. Therefore, it is more likely to cause high-altitude fall accidents when the high-voltage lead wire is arranged.

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