Fault-visible type lightning arrester and manufacturing method thereof

Abstract

The invention discloses a fault-visible type lightning arrester. The lightning arrester comprises a lightning arrester porcelain sleeve, a core rod and a sealing cover; an inner cavity used for containing the core rod is formed in the lightning arrester porcelain sleeve; a fault indication part is arranged on the periphery of the end, close to an opening of the inner cavity, of the lightning arrester porcelain sleeve; the thickness and the strength of the fault indication part are lower than the thickness and the strength of the other parts of the lightning arrester porcelain sleeve; a core body is arranged in the inner cavity of the lightning arrester porcelain sleeve, and an adhesive is charged into a gap of the inner cavity so as to form an adhesive layer; the adhesive layer is used forsealing, preventing falling off of cracking fragments generated by the fault indication part; a high-voltage electrode communicating with the core rod is arranged on the lightning arrester porcelainsleeve; and the sealing cover is arranged on the opening of the inner cavity. The lightning arrester has the advantages that fault warning and separating functions can be achieved; when a non-linear lightning protection element breaks down, the lightning arrester can perform directional self-explosion and can be automatically separated from a circuit; and the operation state can be judged by checking the appearance of the lightning arrester after self-explosion, so that the fault searching time can be shortened.

Description

technical field [0001] The invention relates to the technical field of lightning arresters for power grids, in particular to a lightning arrester with visible faults and a manufacturing method thereof. Background technique [0002] The 10kV distribution network line is the main power distribution network in my country, and the network mainly undertakes the task of directly providing electric energy to users. Due to the complex structure of the network, the low insulation level of the line, and the large gap between the operation and maintenance level of the line and the transmission line, the distribution network is prone to lightning strikes, causing insulator flashover, disconnection or tripping accidents, causing national economic and economic losses. People's lives are damaged. Especially in recent years, with the rapid development of the economy, people have higher and higher requirements for power quality, and put forward higher requirements for the reliability of dis...

AI Technical Summary

Problems solved by technology

[0003] In the long-term use of the traditional zinc oxide arrester, the main component of the zinc oxide arrester, the varistor, withstands the working voltage, instantaneous lightning overvoltage and operating overvoltage of different amplitudes and pulse widths, and the electrical performance will gradually deteriorate. wear, the leakage of the arrester will increase, which will increase the line loss, which is not conducive to the economic operation of the power grid. If the arrester is broken down, it will cause a ground fault. Since the arrester fault is an invisible fault, it will take a lot of manpower and material resources to find the fault point; Different grounding faults of two surge arresters will cause switch protection action and cause power outage for users, affecting production and life

[0004] The existing zinc oxide arrester will explode after failure, and the fragments of the arrester will splash around, causing accidents such as fragments hurting people and affecting other surrounding equipment, causing the accident to expand

[0005] The disconnection of the existing 10kV distribution network line arrester is achieved by connecting the thermal explosion disconnector in series at the lower end of the arrester, but due to the structure and quality of the thermal explosion disconnector, it is prone to "misoperation" and "refusal to operate", which affects the lightning protection of the arrester Protection effect, and due to cost and construction reasons, it is difficult to promote in a large area

Images