A method for dismantling a faulty low-voltage arrester with electricity

Abstract

The invention relates to a method for live removal of a fault low-voltage lightning arrester, and belongs to the field of lightning arresters. The tail end of a double-ended operating rod extends intoa field cabinet through a mounting hole in the bottom of a cabinet body; the head of a fixing screw is embedded in a second concave hole in the tail end of the double-ended operating rod; the fixingscrew is rotated out of a screw hole in a horizontal edge of an L-shaped strip grounding pole; the head end of the double-ended operating rod extends into the field cabinet through the mounting hole in the bottom of the cabinet body; a low-voltage lightning arrester body is held in the first concave hole in the head end of the double-ended operating rod; and the double-ended operating rod can be rotated to rotate the low-voltage lightning arrester body out of an internal thread fixing hole under an operating knife switch. The original transverse working mode of removing the lightning arresterfrom the front side of the field cabinet is changed to the vertical working mode of removing the low-voltage lightning arrester from the bottom of a mounting cabinet, so that live removal of the low-voltage lightning arrester is realized, and field rapid maintenance and replacement of the low-voltage lightning arrester by maintenance personnel are facilitated greatly.

Description

technical field [0001] The invention belongs to the field of lightning arresters, in particular to a lightning arrester used for overvoltage protection of a low-voltage power system. Background technique [0002] Surge arrester is an electrical device used to protect electrical equipment from transient overvoltage (lightning strike, operation, steep wave) and quickly cut off power frequency continuous current. It is usually connected in parallel with the protected line or equipment. [0003] Its internal main components are non-linear resistors (such as zinc oxide resistors), which are in a high-resistance state under normal power frequency voltage due to their good non-linearity, and the arrester will not operate. When the overvoltage occurs, the action resistance sheet of the arrester is turned on, and the overvoltage shock current absorbs part of the energy through the resistance sheet and then leaks into the ground, thereby reducing the amplitude of the overvoltage, redu...

AI Technical Summary

Problems solved by technology

[0008] Due to the limited internal space of the existing installation cabinet, and the existing screw installation holes are all set horizontally, when the existing wrench is used to disassemble the low-voltage arrester, the metal wrench is very easy to touch the surrounding live parts, which is very difficult. It is not conducive to the safe operation of live equipment and the personal safety of operators

Therefore, under the existing conditions, the work of replacing the low-voltage arrester usually needs to be carried out in a power outage state, which is not convenient for a single person to operate in a live state, which affects the continuous operation rate of the power supply equipment and brings power consumption to the power receiving user. Inconvenience

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