Integral post insulator type lightning arrester for electrified railway

Abstract

The invention discloses an integrated post insulator type lightning arrester for an electrified railway. The device comprises an insulating cylinder and a composite jacket fixedly assembled on the insulating cylinder, wherein an upper flange and a lower flange are fixedly arranged at two ends of the insulating cylinder respectively, a zinc oxide resistor disc is arranged in the insulating cylinderand separated by an aluminum backing ring, an upper electrode is arranged in the upper flange, one end of the upper electrode is hermetically connected with the upper flange, a spring is arranged between the upper electrode and the zinc oxide resistor disc, one end of the lower electrode is hermetically connected with the lower flange, and an adjusting gasket is arranged between the lower electrode and the zinc oxide resistor disc. The device is advantaged in that a locomotive of the electrified railway can be protected from being subjected to overvoltage impact, can further be used as a force-bearing insulator, realizes dual functions of integrating excellent protection characteristics of the lightning arrester and mechanical characteristics of the insulator, can reduce consumption of resources, saves cost, can enable equipment to operate stably, and is more compact in structure.

Description

technical field [0001] The invention relates to a post insulator of a power transmission line, in particular to a post insulator type surge arrester for a catenary of a 27.5kV electrified railway. Background technique [0002] Post insulators are an important part of supporting wires and preventing current from returning to the ground in overhead transmission lines. In general overhead transmission lines such as power transmission, power distribution and substations, in order to protect electrical Overvoltage hazards must be equipped with lightning arresters on the lower cross arms of the insulators on the overhead transmission line poles. As a special overhead transmission line, the railway catenary is also equipped with lightning arresters in the railway catenary to ensure that electrical equipment is protected from instantaneous overvoltage hazards caused by lightning strikes on the conductors. In the electrified railway catenary, due to the thundercloud discharge along ...

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Problems solved by technology

Although the above installation method can effectively protect the electrical equipment in overhead transmission lines such as railway catenary, it causes the arrester to occupy the installation space on the cross arm of the utility pole, increase the load and installation strength of the cross arm, and consume more material resources , the problem of increasing the installation cost

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