Dual-safety device with ground wire connection

Abstract

The invention provides a dual-safety device with ground wire connection. The dual-safety device is characterized in that two parallel strain shunt bars are installed at a ground wire between an overhead ground wire suspension clamp or strain clamp and a damper. The first segments of the strain shunt bars are sheet type pre-twisted wiring harnesses twisted on the ground wire, wherein the twisting directions of the pre-twisted wiring harnesses are identical with the twisting direction of the wire strand of the ground wire; and the second segments of the strain shunt bars are cylindrical wiring harnesses and bifurcates and extends from the ground wire at the suspension clamp or strain clamp side, and wiring terminals are compressed at the tail ends and the tail ends are connected to towers bybolts. According to the invention, fusing of a lightning conductor by lightning currents and ground short-circuit currents; a phenomenon that the armour clamp is burned and broken by continuous low discharging because of poor contact can be avoided; and accident occurrence caused by ground wire falling under the condition of armour clamp string or ground wire breaking is avoided. The dual-safetydevice can be installed in an electrified manner; erecting of a crossing rack is avoided; the grid line breaking risk is reduced quickly; and the operation and maintenance costs are lowered substantially.

Description

technical field [0001] The invention relates to the field of power transmission equipment, in particular to a ground wire connection double safety device. Background technique [0002] Transmission lines are responsible for transporting electricity over long distances in the power system. Usually one or two ground wires are erected above the wires. During the operation, if there is a disconnection or disconnection, it is easy to touch the wires below, which will further cause short-circuit tripping of the wires, which may cause large-scale power outages. In particular, the disconnection of conductors and ground wires across railways, highways and oil and gas pipelines causes secondary disasters, which are very bad in nature. [0003] The main reasons for the above-mentioned disconnection and disconnection are as follows: 1. The contact resistance between the ground wire and the suspension clamp is relatively large. When the line is struck by lightning or short-circuited, t...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a ground wire connection double insurance device, which can be safely and conveniently installed at the ground potential when the wire of the transmission line is running with electricity, so as to solve the problem of disconnection and dropout caused by the above reasons

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