Lightning arrester on-line monitor

Abstract

The invention discloses a lightning arrester on-line monitor, which comprises a monitor main body and an insulator, the insulator comprises an insulation main body, a first conductive structure, a resistance valve plate, an outgoing line connecting rod and an incoming line connecting rod, the resistance valve plate is arranged in the insulation main body, and the first conductive structure is arranged in the insulation main body. One end of the wire inlet connecting rod and one end of the wire outlet connecting rod are electrically connected with the wire inlet side and the wire outlet side of the resistance valve plate respectively, the other end of the wire inlet connecting rod and the other end of the wire outlet connecting rod extend out of the insulating main body, the first conductive structure is electrically connected with the wire inlet side of the resistance valve plate, and the monitor main body comprises a shell and a second conductive structure. The insulator is detachably connected with the shell through an outgoing line connecting rod, and the first conductive structure and the second conductive structure can be correspondingly conducted. According to the lightning arrester on-line monitor, the resistance valve plate is arranged in the detachable insulator, when the resistance valve plate is damaged, the insulator can be directly replaced on site, convenience and rapidness are achieved, and the maintenance cost can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of lightning arrester monitoring, in particular to an online monitor for lightning arresters. Background technique [0002] The arrester online monitor (also known as the arrester leakage current and action recorder) is an instrument used in conjunction with the zinc oxide arrester in the high-voltage AC power system. The instrument is connected in series to the grounding circuit of the arrester. Its working principle is: when the arrester is struck by lightning, the discharge current flows through the non-linear resistance valve plate, and the voltage drop on the valve plate supplies power to the discharge counting circuit in the monitor to complete the discharge counting. In the existing on-line monitors for lightning arresters, the non-linear resistors are usually placed inside the monitor and are in reliable contact with the metal conductive shell of the monitor. However, if the lightning discharge curr...

AI Technical Summary

Problems solved by technology

However, if the lightning discharge current is very large or after multiple discharge current shocks, the nonlinear resistor valve may be damaged. At this time, the monitor will not be able to realize the lightning strike counting function. At this time, if you want to replace the resistor valve, you can only Disassemble the monitor housing to replace

However, the monitor has very strict sealing requirements, and it is difficult to disassemble and replace it on site. Therefore, if the resistance valve plate is damaged, the entire monitor is usually replaced, which causes a huge waste of cost.

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