A high-rise building needs some measures for lightning protection. With these lightning protection measures, the safety of this high-rise building can be guaranteed, but are you aware of these lightning protection and grounding projects? There are many interesting things in life, If you are good at understanding, you will find a world that you do not know about, such as the lightning protection project here. With the continuous development of science and technology, people have evolved from simple lightning rods to various forms of lightning protection devices, starting with the prevention of direct lightning strikes and the development of an integrated lightning protection system that prevents both direct lightning and inductive lightning. These all mark the progress of human civilization. Do you understand the calculation of these lightning protection grounding quantities ? For example, what is the calculation of the grounding electrode installation and installation, what amount of grounding bus will be calculated, what is the installation of lightning rods, etc. These lightning protection grounding calculations will have specific units, if you are interested please See below.
Lightning grounding manufacturer
A: Beijing Yitonghui Mine Technology Co., Ltd.
Address: No. 2, Jinguang South Street, Liangxiang Industrial Park, Fangshan, Beijing
B: Beijing Xing Tian Tong Lei Technology Co., Ltd.
Address: Building 5, No.7, Lianbao Road, Haidian District, Beijing, 2007
C: Beijing Huatenda Lightning Protection Technology Co., Ltd.
Address: 103A, Block A, 43 Dongfang Road, Xiji Town, Tongzhou District, Beijing
Lightning protection grounding device
1) Lightning receiving device: Metal rods (lightning receptors) that directly or indirectly accept lightning, such as lightning rods, lightning protection strips (nets), overhead grounding wires, and surge arresters.
2) Downlead: Conductor used to conduct lightning current from the lightning receptor to the grounding device.
3) Grounding wire: Metal conductors that do not carry current under normal conditions for connection between the grounding terminal of the electrical equipment and the tower and the grounding body or neutral wire.
4) Grounding body (pole): A metal conductor buried in earth and in direct contact with the ground is called a grounding body. Divided into vertical grounding body and horizontal grounding body.
Lightning grounding installation plan
Lightning grounding, first of all to detect the surrounding landforms, to understand the project overview, and then the preparation of materials, utensils and personnel, if it is used indoors, indoor mainly used in the power equipment and then connected to ground, wire clamp with a flat spiral Type, grounding method using grounding clamp (connected to the busbar and copper row). Low-voltage grounding wire is divided into two types: indoor equipment grounding wire and outdoor wire grounding wire. Generally, the low-voltage wire adopts three-phase four-wire system. If it is used outdoors, the outdoor lines are mostly double-spring type. The grounding method is adopted in the way of entering the ground. It is installed at the highest point of the house, buried and deflected down, the connection of the down conductor must be secure, the grounding line should be as vertical as possible, and the grounding should be as far as possible. Deep in the rice, in the scattered salt, backfill the soil.
Grounding precautions
According to the area, height of the protected building, the thunderstorm day and the correction coefficient of the buried environment, the nature of the use of the building, etc., and the height of the pole of the lightning protection object should be determined. When the installation is completed, the components must be connected reliably. After the installation is completed, the joints or metal surfaces of the metal coating are damaged. Anti-rust treatment should be performed. The lightning protection equipment shall be connected to the lightning protection belt or the ground network on the daughter's wall through the deflector and the grounding resistance value shall not exceed 10 ohms. In areas with high soil resistivity, the requirement for grounding resistance can be appropriately relaxed. After the arrester is put into use, it is necessary to periodically check whether the connection of each part is firm and whether the down conductor and the grounding system are connected reliably.
Lightning grounding acceptance specification
According to GB50057-94 (2000 edition) "Building lightning protection design specifications," Chapter III, the building's lightning protection measures; Section II, the first type of lightning protection building lightning protection measures.
Article 3.2.1: The grounding device for lightning protection should be shared with the grounding device of the electrical equipment, and the ground frequency resistance of the power frequency should not exceed 10Ω. The requirements for lightning protection measures for the third section and the second type of lightning protection structures
Article 3.3.4: The grounding resistance of each down conductor is not less than 10Ω, and the direct grounding lightning protection device should be a common grounding device such as lightning protection, electrical equipment, and information system.
Lightning protection grounding calculation
1, lightning rod in its processing and production are installed with "root" calculations, but the independent installation of lightning rod is based on "base" as a unit, so the next time you encounter a lightning rod should be renamed as a few basic lightning rod .
2. The production and installation of the grounding electrode is the same as that used in the production of lightning rods. It uses the “root†as the unit. The length is 2.5m when the manufacturer does not have special specifications.
3. The laying of grounding busbars and the laying of lightning conductors are all calculated in units of a length of 10m. Its length will be 3.9% longer than the required length due to other special conditions. For example, when cornering and avoiding obstacles.
4, like the ground jumper here is a "place" as a unit, each span once you need to be in accordance with the "one" calculation, there are outdoor power distribution device architecture are grounded, here is also in accordance with "a "Calculation.
5, the semiconductor long needle lightning protection device is a "set" as the unit when installing, it will perform the relevant project according to the required installation height.
6. The installation of the main ribs ground lead in the building is based on the unit of 10m, which needs its integer. There are two main bars in each column. If more than two are needed, this will require you to readjust.
7. The production and installation of disconnected clips are done using "sets" as a unit.
8. The lay-out of the pressure equalizing ring is considered in the form of equalizing ring ground connection using the main reinforcement in the ring beam, and is calculated in 10m.
9, steel, aluminum window grounding is calculated in two places.
10. The resistance reducing agent is buried in kg
Editor's summary: Projects of the project need to be careful not to have the slightest sloppy, and sometimes because of a small mistake that triggers painful consequences, so I believe that these project calculations above, if you are an engineer, you will be memorized in Heart's.
House Renovation Precautions Home Renovation Precautions Decoration Precautions House Renovation Precautions Handover Precautions Lightning Protection Groundwork Calculation
Solar Street Light,Led Street Light,Led Street Garden Lamp,High Power Led Street Light
JIANGMEN MOSCOT OPTOELECTRONIC TECHNOLOGY CO.,LTD. , https://www.sensorsled.com