Novel metal oxide lightning arrester

Abstract

The invention discloses a novel metal oxide lightning arrester. The lightning arrester comprises a core and an outer insulating sheath arranged on the outer side of the core, wherein an upper electrode, a resistor, a discharge electrode and a lower electrode are sequentially arranged in the inner space of the core from one end to the other end; a wiring stud is connected onto the upper electrode,a high-pressure insulated wire penetrating through the core and the outer insulating sheath is connected onto the wiring stud, a connecting bolt penetrating through the core and the outer insulating sheath is connected onto the discharge electrode, a ball stud penetrating through the core and the outer insulating sheath is connected onto the lower electrode, and a fastening bolt for mounting is fixedly connected at the outer side end of the core at one end, where the lower electrode is arranged, of the core; a mounting plate is fixedly connected onto the fastening bolt for mounting, and a connecting bolt sheath is arranged on the outer side of the connecting bolt. The lightning arrester can effectively prevent an insulator from being damaged by lightning overvoltage impact and effectivelyprotect an insulted conductor from breakage by lightning stroke and has the greatest characteristics of high reliability, low failure rate and low maintenance workload.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution equipment, and in particular relates to a novel metal oxide arrester. Background technique [0002] With the continuous lengthening of power distribution network lines and the popularization of insulation design, the disconnection accidents caused by lightning damage are prominent, and the statistics of insulator breakdown accidents continue to rise, which has seriously threatened the safe operation of distribution network lines. Surge arrester is a protective device connected in parallel to electrical equipment. As a gap device artificially installed on the line or equipment, it is in an isolated and insulated state under normal operating voltage. Under overvoltage, the gap device is broken down and grounded to discharge and reduce voltage. , so as to protect the insulation of the line or equipment under overvoltage, which is sometimes called an overvoltage protector o...

AI Technical Summary

Problems solved by technology

At present, existing lightning arresters have the following disadvantages: they cannot effectively prevent insulators from being damaged by lightning overvoltage impacts, they cannot effectively protect insulated wires from being disconnected by lightning strikes, and most importantly, the existing lightning arresters have low reliability and failure rate High, resulting in heavy maintenance workload

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