The lightning protection grounding grid is really so heavy or how to do it.

In the field of lightning protection systems, we are faced with a common thing in the field of weak lightning protection, lightning protection, lightning protection, lightning protection, grounding, and grounding. Net, and many lightning protection experts repeatedly, and then emphasize the importance of the ground network, the landless network project is the castle in the air, the lightning protection project of the groundless network is more dangerous than not doing lightning protection, the land is not up to standard The net may also lead to the upper body at all times. So, what is this ground net? Is it really so heavy? What kind of ground network can be truly achieved?

The ground net is actually buried under the earth. The simple ground net is connected by the vertical grounding body and the horizontal grounding body. There are star-shaped, M-shaped, and some simpler, which is a straight line or square. , round and so on. The artificial vertical grounding body buried in the soil should be hot-dip galvanized angle steel, steel pipe or round steel; the artificial horizontal grounding body buried in the soil should be hot-dip galvanized flat steel or round steel. The ground wire should be the same as the cross section of the horizontal grounding body. The buried depth of the artificial grounding body in the soil should not be less than 0.5 m, and should be laid below the frozen ground layer, which should not be less than 1 m from the wall or foundation. The grounding body should be kept away from the place where the soil resistivity is increased due to high temperature effects such as kiln and flue. The length of the artificial steel vertical grounding body should be 2.5m. The spacing and the spacing of the artificial horizontal grounding body are preferably 5 m, which can be appropriately reduced when limited by the place.

Complex ground network is the use of a variety of lightning protection grounding materials, such as lightning protection grounding module, resistance reducer, copper-clad steel ground rod, ion ground rod, flat copper, etc., these are in many soils resistivity is relatively large When the resistance is not lowered, the auxiliary network is used to make the ground network reach the small state of Zui. Of course, this introduction is only a general introduction. There are many other types, such as simply using the original steel bars of the building. structure.

The ground network is the core thing in a lightning protection project. Whether it is only a direct lightning strike, or only an induction lightning, or not doing it, it may be indispensable for the existence of the ground network, because he is the core part of all electrical conductors. It is a medium in which all electric conductors discharge lightning current or lightning waves and static electricity into the earth. Without him, basically all lightning protection facilities are in vain. If the current inside the electric conductor cannot be released through the medium, it will cause more The ground potential counterattacks and the like, so the importance of the ground network is self-evident.

In fact, the area or length of the ground network is really not mentioned in the national standard. It is only said how much the grounding resistance of the grounding grid should be. Generally speaking, the grounding net of the direct lightning strike must be below ten ohms. The network must be below four ohms, and the joint grounding network must reach less than one ohm. As for the large ground network to be used, it depends on the situation on the site. It has a perimeter of 80 meters and a hundred meters. Even two hundred meters of different, many times the construction is to make a circle around the building, but the ground network can not be too small, too small, if the lightning current is too large, the small network can not be discharged, but instead It causes the ground potential to counterattack and directly flows back from the bottom to the top along the ground net. This is very dangerous. It will not only burn out the indoor electrical equipment, but also cause people to step voltage and the like, which will cause life safety problems.

With the development of scientific research, many of our lightning protection companies have said that they have developed new products, saying that they can be protected against lightning without grounding. This is not feasible in the national standard for lightning protection, and it is not logical in normal terms. It’s not a good idea to explain here, maybe it’s just a gimmick, maybe it’s really developing advanced things at home and abroad, but we don’t know it. Of course, we don’t necessarily follow the rules, we must implement it according to the national standard. If you cross this solid line, you have really developed a lightning protection product that does not require the ground net. It is also a great progress for us human beings. In the future, lightning protection construction is much simpler. After all, the construction of the ground net is very labor-intensive.

Ok, I hope that after reading the netizens, I can really realize the importance of the network. If I encounter related engineering projects in the future, I will remember to do the work well. Don’t lose it because of the small, for the convenience of the moment. , lost important things. Because in our daily life, we really encounter this phenomenon is not a decimal, many people do not understand, or in order to save money, often ignore this most important thing, waiting for an accident can only make people I am sorry, I regret it.

More lightning protection technology issues, details consultation: Shenzhen Guoan Times Lightning Technology Co., Ltd.