Insulator support fixed gap overvoltage protector

Abstract

The invention relates to an insulator support fixed gap overvoltage protector. The insulator support fixed gap overvoltage protector comprises a protector upper lead wire, a small insulation cover, an insulator supporting piece, an upper drainage ball, a lower drainage ball, a lightning arrester body and a protector mounting plate, wherein the insulator supporting piece and the lightning arrester body are arranged up and down; the small insulation cover covers the upper end of the insulator supporting piece; the upper drainage ball and the upper drainage ball are correspondingly arranged at the upper and lower ends of the insulator supporting piece one by one; and the protector mounting plate is fixed at the lower end of the lightning arrester body. According to the insulator support fixed gap overvoltage protector, the insulator supporting piece and a metal oxide lightning arrester are directly connected to form a whole structure and are wholly molded, so that the whole overvoltage protector is relatively miniaturized, the insulation protection reliability is increased, the requirements on a production process are relatively high, and a production technology is relatively developed.

Description

technical field [0001] The invention relates to an overvoltage protector supported by an insulator with a fixed gap. Background technique [0002] At present, the 10kV distribution lines in large and medium cities in my country basically use insulated wires as overhead distribution lines, effectively solving the corridor and safety problems that are difficult to solve with bare wires, but overhead insulated wires also bring a new problem: overhead The lightning overvoltage breakdown point of insulated conductors is within 200mm of the post insulator, which will cause the insulator to flashover or breakdown along the surface, and due to the blocking effect of the insulating layer, the arc root of the power frequency freewheeling arc will concentrate on the insulating layer after the lightning strike breakdown point, it is easy to cause the insulated wire to melt and disconnect, which seriously threatens the safety of equipment and personal safety. [0003] At present, on the 1...

AI Technical Summary

Problems solved by technology

[0002] At present, the 10kV distribution lines in large and medium cities in my country basically use insulated wires as overhead distribution lines, effectively solving the corridor and safety problems that are difficult to solve with bare wires, but overhead insulated wires also bring a new problem: overhead The lightning overvoltage breakdown point of the insulated wire is within 200mm of the post insulator, which will cause the insulator to flash over or break down along the surface, and due to the blocking effect of the insulating layer, the arc root of the power frequency freewheeling arc will concentrate on the insulating layer after the lightning strike breakdown point, it is easy to cause the insulated wire to melt and disconnect, which seriously threatens the safety of equipment and personal

Although the gap distance is fixed, it solves the instability of the manual installation gap, but the metal oxide arrester body in the protector is always connected to the line system, which makes its air gap only an arc discharge gap and loses the isolation circuit With the role of the metal oxide arrester body, the arrester body needs to consider its aging performance, which increases the inspection and replacement work of the protector in the line

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