DC blocking type low residual voltage gas tube lightning arrester

Abstract

The invention provides a DC blocking type low residual voltage gas tube lightning arrester comprising a threaded sleeve, a male casing, a female casing, an upper casing, a lower casing, female insulators, contact pins, a patch capacitor, a gas tube and sheet copper, wherein the male casing and the female casing are positioned at the front end and the rear end of the lightning arrester respectively; the upper casing and the lower casing are fixed between the male casing and the female casing and are fastened together; the threaded sleeve is screwed on the outer ring surface of the male casing; the contact pins include a front contact pin and a rear contact pin which are positioned in the central holes of the male casing and the female casing respectively and isolated from the male casing and the female casing respectively through the two female insulators; the patch capacitor is fixed on the outer side surface at the rear end of the front contact pin and is in contact with the end surfaces of the female insulators; the gas tube is positioned in a central hole formed between the upper casing and the lower casing and is fixed on the upper casing; and the front contact pin, the patch capacitor and the gas tube are connected through conductors. The lightning arrester provided by the invention has the advantages of simple structure, convenience in installation, effectively lowered residual voltage, good lightning-protection effect and high safety performance.

Description

technical field [0001] The invention relates to a lightning arrester, in particular to a DC blocking type low residual voltage gas tube lightning arrester, which is mainly used for antenna feeder systems of mobile communication base stations, TV frequency bands and some broadcasting frequency bands to avoid lightning shock waves. Background technique [0002] Surge arrester is an electrical device that can release lightning or overvoltage energy in power system operation, protect electrical equipment from instantaneous overvoltage hazards, and cut off freewheeling, so as not to cause system grounding short circuit. The arrester is usually connected between the live wire and the ground, and is connected in parallel with the protected equipment. When the overvoltage value reaches the specified operating voltage, the arrester will act immediately, flow the charge, limit the overvoltage amplitude, and protect the insulation of the equipment; after the voltage value is normal, th...

AI Technical Summary

Problems solved by technology

The gas tube arrester is one of many types of arresters. The current gas tube arrester has two structures: one is the coaxial type, and the other is the T-type. Both structures have a disadvantage that the residual voltage is too large. Large, it can reach about 1000V, which is easy to cause equipment damage, and the inner conductor is a direct current path

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