Airport lightning protection grounding module GD-200K resistance reducing agent GD-04Y-3M150 grounding module 150 * 800 cylindrical module

Description :

　　1、 Overview of GD-04Y-3M150 Cylindrical Grounding Module

　　A cylindrical grounding module is a grounding body mainly composed of conductive non-metallic materials, which are made up of non-metallic minerals with good conductivity and stability and strong conductive materials It is a specialized product used to reduce grounding resistance, suitable for various types of soil environments, and has significant advantages in high soil resistivity areas. It is mainly used as a 'building site' Grounding bodies for lightning protection, anti-static, AC work, safety protection, and other purposes Its birth has ushered in a new era of grounding materials and grounding technology

　　Compared with traditional grounding bodies, cylindrical grounding modules have the advantages of high resistance reduction efficiency, stable grounding resistance, reduced ground potential backlash, long service life, corrosion resistance, non-toxic and environmentally friendly, and convenient construction and installation. They are widely used in lightning protection grounding, safety protection grounding, AC working grounding, DC working grounding, anti-static grounding, shielding grounding, and other special grounding.

　　Overview of GD-04Y-3M150 Cylindrical Grounding Module

　　A cylindrical grounding module is a grounding body mainly composed of conductive non-metallic materials, which are made up of non-metallic minerals with good conductivity and stability and strong conductive materials It is a specialized product used to reduce grounding resistance, suitable for various types of soil environments, and has significant advantages in high soil resistivity areas. It is mainly used as a 'building site' Grounding bodies for lightning protection, anti-static, AC work, safety protection, and other purposes Its birth has ushered in a new era of grounding materials and grounding technology

　　Compared with traditional grounding bodies, cylindrical grounding modules have the advantages of high resistance reduction efficiency, stable grounding resistance, reduced ground potential backlash, long service life, corrosion resistance, non-toxic and environmentally friendly, and convenient construction and installation. They are widely used in lightning protection grounding, safety protection grounding, AC working grounding, DC working grounding, anti-static grounding, shielding grounding, and other special grounding.

　　Working principle and function of cylindrical grounding module

　　The grounding resistance of the grounding grid is mainly composed of the self resistance of the grounding body and its connecting materials, the contact resistance between the grounding body and the surrounding soil, and the diffusion resistance of the incoming current in the soil. Among them, the contact resistance between the grounding body and the soil and the diffusion current of the incoming current in the soil are the main parts of the grounding resistance, accounting for more than 98% of the grounding resistance. Traditional grounding bodies are mostly metal conductors, such as flat steel, round steel, angle steel, steel pipe, copper rod, copper plate, etc. The use of traditional grounding materials for grounding grids is greatly affected by seasons, and the grounding resistance is not stable enough. The service life of the grounding grid is relatively short, and it is difficult to solve the grounding problem under conditions of particularly high soil resistivity.

　　The cylindrical grounding module is mainly made of highly conductive and stable metal materials, with a metal material that has undergone anti-corrosion treatment on the surface as the skeleton, and is extruded by specialized equipment.

　　Compared with traditional grounding bodies, cylindrical grounding modules have the following significant characteristics:

　　(1) Reducing contact resistance, the main material of the cylindrical grounding module is similar to the physical structure of the soil, and can be integrated with the soil, making the effective contact area between the grounding body and the soil much larger than that of the metal grounding body, increasing the effective dissipation area of the grounding body, greatly reducing the contact resistance between the grounding body and the soil, thus significantly improving grounding efficiency and reducing the land area occupied by the grounding grid.

　　(2) Stable grounding resistance: The cylindrical grounding module has a strong ability to absorb moisture and keep the surrounding soil moist, ensuring that the grounding module effectively conducts electricity; At the same time, the conductivity of the conductive material in the grounding body is not affected by seasonal changes such as dry humidity, high and low temperatures, thus providing stable grounding resistance.

　　(3) Reduce ground potential counterattack: The non-metallic material of the cylindrical grounding module creates a relatively gentle low resistance area between the metal with a huge difference in resistivity and the soil. When a large current is applied, it can reduce the transient potential gradient of the grounding body and grounding wire, lower the step voltage and contact voltage, and reduce the probability of ground potential counterattack.

　　(4) Long service life: The main body of the cylindrical grounding module itself is made of corrosion-resistant material, and its metal frame is made of metal material that has undergone anti-corrosion treatment on the surface. Therefore, the overall anti-corrosion performance of the grounding body is excellent, and the service life can reach more than 50 years.

　　3、 Application scope of cylindrical grounding module:

　　1. Working grounding, safety grounding, and lightning protection grounding for power plants, substations, switch stations, high-voltage transmission lines, electrified railways, telecommunications, mobile communication base stations, microwave relay stations, ground satellite receiving stations, radar stations, etc. 2. Valuable precision instruments, computer room equipment, postal and telecommunications programmable control equipment, broadcasting and television equipment, electronic medical equipment, etc. are grounded and protected. 3. Lightning protection grounding for various high-rise buildings, tall structures, famous ancient buildings, tall memorial towers, etc. 4. Oil transportation pipelines and oil and gas tanks, as well as lightning protection and grounding for warehouses containing flammable and explosive materials.

　　4、 Calculation of grounding resistance for cylindrical grounding module

　　Based on years of practical experience in using grounding modules to construct grounding grids, the following formula for calculating module usage is summarized:

　　a、 The cylindrical grounding module is vertically buried, and the grounding resistance of the individual unit is:

　　ρ 4L(L+2h)

　　Rd = ———— . Ln ———————— . M

　　2πL d(L+4h)

　　b、 The flat grounding module is horizontally buried, and the grounding resistance of the individual unit is:

　　ρ

　　Rd = 0.22 ×———————— . M

　　√ a.b

　　c、 Total grounding resistance after parallel connection:

　　Rd

　　Rn= ————

　　n.k

　　In the above equation:

　　ρ - measured soil resistivity of buried strata (Ω· m);

　　L - length of grounding module (m);

　　D - diameter of grounding module (m);

　　H - burial depth of grounding module (m);

　　a .B - Length and width of the flat grounding module;

　　K - the utilization coefficient of the module, with a value range of 0.55-0.85. The more modules there are, the smaller the value of K;

　　M - module grounding coefficient, 0.27 for flat panel modules and 0.25 for cylindrical modules;

　　N - Number of grounding modules;

　　Rd - Grounding resistance of a single grounding module (Ω);

　　Rn - Grounding resistance value of the grounding grid design (Ω);

　　Ln - natural logarithm.

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• Airport lightning protection grounding module