A kind of metal oxide arrester for gis

Abstract

The invention relates to a metal oxide lightning arrester for GIS. A low-potential part of the lower part of a lightning arrester cylinder is of a necking-down close-up structure, the diameter of thelower part of the cylinder and the diameter of a corresponding base at the lower part of the cylinder are reduced, and the volume of the cylinder is reduced, so that the internal space of the cylinderis adequately utilized. Meanwhile, a conductive rod is directly fixedly connected to an insulator, and a voltage-sharing cover is fixed on the insulator in a top-pressure manner through a fixed connecting structure between the conductive rod and the insulator, so that components such as a touch seat and a voltage-sharing cover mounting seat are saved, the number of the components of the whole lightning arrester is decreased; and the periphery of the conductive rod can be completely covered with the voltage-sharing cover, so that the shielding effect of the voltage-sharing cover to the conductive rod is improved.

Description

technical field [0001] The invention belongs to the field of high-voltage electrical arresters in power systems, and in particular relates to a metal oxide arrester for GIS. Background technique [0002] Arresters in the prior art, such as the "110kV three-phase miniaturized tank-type metal oxide arrester" disclosed in the Chinese utility model patent with the authorized announcement number "CN204834220U", the insulating pads, low-voltage outlet flanges, and resistor plates in the arrester 1. The pressure plates are arranged in turn to form resistor columns and placed on the bottom plate, on which a shielding seat is installed, and a voltage equalizing shielding cover is installed on the shielding seat. A spring and a small shield are installed above the voltage equalizing shield, the conductive rod is fixedly connected to the insulator by bolts, and the conductive rod and the shield seat are plugged and conducted to form a conductive plug-in structure. The small shield and ...

AI Technical Summary

Problems solved by technology

[0003] The problem with this existing lightning arrester is that the voltage equalizing cover of the lightning arrester is composed of two parts: a small shielding cover and a voltage equalizing shielding cover, and both are fixed on the shielding seat on the resistor sheet column, so that the resistor sheet column The structure becomes more complicated, and the small shielding cover cannot be completely covered on the conductive rod, so that the part of the conductive rod above the small shielding cover cannot be protected by the small shielding cover, and the shielding effect is poor.

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