Overvoltage protecting ground device with insulative wire leading underground deeply

Abstract

The invention is designed for use in preventing electric apparatus from damage of earth potential rising caused by discharge to earth from over-voltage and preventing human from danger of contact and step potential. The provided apparatus hasn't a horizontal earth mat and a voltage-sharing mat, and doesn't contact with the metal material in building, and only provides grounding for electric equipment easy to generate discharge. It mainly comprises an earth wire and earthed pole. The earth wire is connected to soil through the earthed wire, and its upper end is connected to an earthed point of a grounded device while its lower end is connected to the earthed pole. The earthed wire is led into underground in a 3 meter depth. It has a hollow structure where multi through holes are opened in order to release conducting ion.

Description

Technical field [0001] The invention relates to an overvoltage protection grounding device. In the overvoltage protection grounding, it is mainly used to prevent counterattack damage to electrical equipment due to the rise of the ground potential and the contact potential and step potential when the overvoltage discharges to the ground. Harm to the human body. Background technique [0002] At present, the known and widely used overvoltage protection grounding devices mainly use bare conductors as grounding bodies, and lay horizontal grounding grids and voltage equalizing grids in a large area in a certain way at a depth of 0.6 to 0.8 meters below the ground, and place lightning rods or Lightning protection belts, neutral points of electrical equipment, metal casings and bases of various fixed equipment, various metal components, steel bars and metal pipes of buildings, etc., are electrically connected with the horizontal grounding grid and the voltage equalizing grid. The p...

AI Technical Summary

Problems solved by technology

If we continue to use this traditional overvoltage protection grounding device, how much metal material and manpower and material resources will be consumed in the world, I am afraid that it is impossible to calculate without astronomical figures

In addition, due to the equipotential connection of the traditional overvoltage protection grounding device, the local high potential formed by the overvoltage at the discharge point is diffused to the entire grounding network and the voltage equalizing network, resulting in a high ground potential in places where no overvoltage discharge occurs , resulting in damage to electrical equipment caused by counterattack voltage and the scope of harm to the human body by contact potential and step potential has been greatly expanded. This situation has a more serious impact on the working conditions and insulation of low-voltage equipment, and it has to be universally Taking other measures for protection makes the originally relatively simple things more and more complicated, and it takes a lot of manpower and material resources to not necessarily achieve good results. It is really thankless

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