Lightning arrester disconnector device

Abstract

The invention relates to a lightning arrester disconnector device, which comprises a wire, a lightning arrester and an electric corrosion wire, wherein one end of the lightning arrester is provided with a first electrode, the other end is provided with a second electrode, the first electrode is adjacent to the wire and spaced from the wire, a main gap is formed between the first electrode and thewire, and the second electrode is away from the wire; and one end of the electric corrosion wire is connected with a ground wire, the other end is connected with the end, which is away from the wire,of the lightning arrester, the electric corrosion wire and the second electrode are arranged at intervals, and an auxiliary gap is formed between the electric corrosion wire and the second electrode.The lightning arrester disconnector device can be applied to a lightning arrester with a series air gap and is used for cutting off a discharge channel after the lightning arrester is broken down, sothat the problem that the lightning arrester with the series air gap is easy to frequently discharge to cause line tripping is well solved. The whole device is not grounded any more, and the dischargechannel is cut off, thereby being no longer a weak point on the line.

Description

technical field [0001] The invention relates to the technical field of lightning arresters, in particular to a disconnector device for lightning arresters. Background technique [0002] In the operation and maintenance of 10kV overhead lines, lightning protection has always been one of the priorities. In order to protect against lightning, zinc oxide arresters are widely used by power grid enterprises, including non-gap arresters and series air gap arresters. Get struck by lightning. Among them, arresters with series air gaps are mostly used for lightning protection of lines due to the characteristics that they will not cause long ground faults after breakdown; arresters without gaps are mostly installed in station areas and equipment for lightning protection and to prevent overvoltage in the system . The non-gap arrester will cause a long-term grounding fault after breakdown, so in recent years, some non-gap arresters are equipped with heat-melt or thermal-explosive arre...

AI Technical Summary

Problems solved by technology

However, for arresters with series air gaps, due to the isolation effect of the air gaps, there is no leakage current, so the heat-melt or thermal explosion type arrester disconnectors cannot work normally; after the arresters with series air gaps are broken down, although it will not cause long-term grounding faults , but because its lightning impulse discharge voltage is lower than that of the line insulator, this can make it a weak point of the line. When there is a lightning overvoltage next time, it will discharge more frequently, causing the line to trip

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