Composite insulator support fixing gap line type arrester

Abstract

The invention discloses a composite insulator support fixing gap line type arrester, wherein a compound insulation alternating current gapless metallic oxide arrester and an insulator used for supporting gaps are combined into a whole; a tap is led out between the arrester and the insulator; an upper discharge electrode is bent to be connected with a gap upper discharge ball; the upper discharge electrode is packed by silicon rubber, and the upper discharge ball is covered by a silicon rubber cover, thus preventing the discharge ball from causing human electric shock due to suspension high-voltage potential; and in addition, after a protective cover is added, the reliability for resisting rain, snow and birds can be improved. The arrester has two types of structures, the upper and lower parts of the arrester can be grounded so as to meet the wiring requirements when the lead is arranged above or below the tower cross arm; and the arrester can be respectively applicable to straight rods and broken link rods, the volume is small and the installation and construction are convenient.

Description

technical field [0001] The invention relates to the field of lightning arresters, in particular to a line type lightning arrester. Background technique [0002] The structure of the traditional insulator-supported gap line arrester is as follows: the arrester and the insulator supporting the gap are two independent individuals, the arrester and the insulator are connected by bolts, and two discharge gap balls are fixed on the insulator, the air gap and the composite insulation without gap metal Oxide arresters are connected in series, and the characteristics of the arrester are determined by the size of the gap, the size of the discharge ball, the surrounding gas state and the volt-ampere characteristics of the arrester. Therefore, the traditional insulator-supported gap line arrester has the following defects: 1. The discharge gap ball The upper discharge ball leads the high voltage to the ground terminal, and the upper discharge ball has a high voltage floating potential, ...

AI Technical Summary

Problems solved by technology

[0002] The structure of the traditional insulator-supported gap line arrester is as follows: the arrester and the insulator supporting the gap are two independent individuals, the arrester and the insulator are connected by bolts, and two discharge gap balls are fixed on the insulator, the air gap and the composite insulation without gap metal Oxide arresters are connected in series, and the characteristics of the arrester are determined by the size of the gap, the size of the discharge ball, the surrounding gas state and the volt-ampere characteristics of the arrester. Therefore, the traditional insulator-supported gap line arrester has the following defects: 1. The discharge gap ball The upper discharge ball leads the high voltage to the ground terminal, and the upper discharge ball has a high-voltage floating potential, which may easily cause personal accidents

2. The installation angle of the discharge ball is zero degrees to the horizontal direction. Due to the small gap distance, it is easy to cause short circuit in the gap when it is exposed to rain or snow

3. The arrester of this structure can only be used for the wires (straight rod) where the high-voltage wires are above the cross-arm of the tower, and the tower (broken link) where the high-voltage wires are below the tower cannot be installed.

4. The support plate supporting the discharge gap ball is made of organic materials such as SMC, which has poor weather resistance and short operating life outdoors. When it is exposed to rain or snow, the support plate may break down and the ball gap will not discharge

5. The arrester and the support plate supporting the discharge gap are split structures, which are large in size and inconvenient for on-site construction

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