Full-insulated lightning arrester

Abstract

The invention discloses a full-insulated lightning arrester which comprises an insulated seat body with a cable wiring device, wherein a lightning arrester socket and a disconnector interface are arranged on a body of the insulated seat body. The lightning arrester socket is provided with a live wire spigot connected with the cable wiring device as well as a zero line spigot connected with the disconnector interface; in the pluggable lightning arrester, pins are led from a lightning arrester insulated casing and are spiced with the live wire spigot and the zero line spigot of the lightning arrester socket; in the disconnector, a power grind connecting terminal and a grounded terminal are led from the disconnector insulated casing; the power grid connecting terminal is connected with the disconnector interface; and a zero line of the pluggable lightning arrester is led from the grounded terminal. The full-insulated lightning arrester disclosed by the invention can be used for better protecting a circuit and resisting water and rain and is favorable in insulating effect, safe and reliable in work and strong in capability of adapting to the environment; the electrified operation can be realized without worrying about electric shock conditions; if the full-insulated lightning arrester has faults, the disconnector actively acts, so that the full-insulated lightning arrester is separated, the power grid is protected, and further, the power grid can normally supply power; and in addition, the monitoring and timely replacement are conveniently carried out.

Description

technical field [0001] The invention relates to a lightning protection device, in particular to a fully insulated lightning protection device. Background technique [0002] Surge arresters can release lightning or power system operating overvoltage energy, protect electrical equipment from instantaneous overvoltage hazards, and can cut off freewheeling, so as not to cause system grounding short circuit, so it is an indispensable protection device in power systems. In the power system, lightning arresters are generally installed on the secondary side of the terminal transformer. When a lightning strike or power system overvoltage occurs, the voltage of the secondary side lightning arrester to ground exceeds a certain value, and it will be broken down and become a new safety The grounding point, which can play the role of lightning protection and overvoltage protection, and when the voltage returns to normal, the arrester automatically resets and is in an open state, so that ...

AI Technical Summary

Problems solved by technology

At present, the above-mentioned types of lightning arresters are generally exposed outside, and due to the particularity of the working environment, people cannot directly touch them, otherwise they will be electrocuted and cause casualties, and generally need to be installed indoors or in a rainproof and waterproof environment, otherwise they will Easy to cause failure after water

Aiming at this problem, the more common solution at present is to install an insulating sleeve outside the arrester to prevent the arrester from directly contacting the outside air. However, although this can temporarily guarantee the working safety of the arrester, once the arrester is damaged or due to other reasons, it needs to be replaced. Dismantling and replacement in the power system can only be done after the system is completely powered off, and the operation time usually lasts for more than two hours, which will greatly affect the reliability of the system power supply

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