Auxiliary tool for resistive current testing wire of 750KV lightning arrester

Abstract

An auxiliary tool for a resistive current testing wire of a 750KV lightning arrester comprises a tong-shaped wire clamp, an insulated rod, a wire clamp bracket, an operating rod, and an extended rod which is obtained through modifying a common insulated rod. The wire clamp bracket is fixedly arranged at the upper part of the insulated rod and furthermore obliquely extends along the upper part of the insulated rod outwards. The operating rod is provided with an operating wrench, a test switch, a test wire pile and a grounding pile. The operating wrench is obliquely arranged at the middle part of the operating rod. The middle part of the operating wrench is provided with a fixing screw hole. The test switch is closely adjacent with the operating wrench. The test wire pile and the grounding pile are arranged at the end of the operating rod and are respectively used for connecting with the testing wire and the grounding wire of a resistive current tester. The tail end of the extended rod is provided with a connecting pipe for connecting with the operating rod and another extended rod. The auxiliary tool has an advantage of simple operation and can satisfy a requirement for resistive current testing wires of lightning arresters with different heights, so that a tester is protected from an induction voltage in a wiring process, thereby improving safety and accuracy in resistive current testing of the 750KV lightning arrester.

Description

technical field [0001] The invention relates to the field of electric power, and relates to the state detection technology of electrical equipment, in particular to an auxiliary tool for resistive current test wiring of a 750KV arrester. Background technique [0002] Zinc oxide arrester is the most important type of overvoltage protection equipment. In the power system, it can protect various electrical equipment from the impact of lightning overvoltage, operating overvoltage and power frequency transient overvoltage. At present, it has been widely promoted and used, especially in ultra-high voltage power transmission and transformation projects. In order to ensure the long-term safe operation of the arrester, in addition to using the conventional pre-test to detect the performance of the arrester, live detection is also used. As a means of state detection, live detection is an indispensable method for accurately evaluating the state of electrical equipment and ensuring the ...

AI Technical Summary

Problems solved by technology

[0006] (1) In the 750kV substation, the on-line monitoring devices and counters of some arresters are located at a higher position from the ground, so that when testing, it is necessary to climb the insulation ladder or test the insulation rod test line, and because the test line is in contact with the ground flat iron Affected by the paint on the flat iron, it is very easy to have poor contact, which greatly reduces the working efficiency

[0007] (2) Due to the influence of the strong electromagnetic environment in the 750kV substation, use a long insulating rod to stand up and connect the test line to the grounding circuit of the arrester. The long test line is very easy to generate induced voltage, which is unfavorable to testers and test instruments. It is easy to cause adverse consequences such as test interruption, electric shock, etc.

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