How much does it cost to install a lightning rod?

The price of lightning rods is about one or two hundred yuan each. The price of lightning rod is influenced by brand, category, specification and market. The key is to learn how to choose. 1, the calculation method of reasonable selection of lightning rod protection range. The calculation methods of lightning rod protection range mainly include broken line method and rolling ball method. The main characteristics of "broken line method" are intuitive design, simple calculation and saving investment, but it is not suitable for buildings with a height greater than 20m; The main feature of "rolling ball method" is that it can calculate the protection range of lightning rod or lightning belt combined with power grid, but the calculation is relatively complicated and the investment cost calculated by this method is large. Among the two calculation methods, the "broken line method" is a mature method, which is also called "regulation method" in power system, that is, the protection range of a single lightning rod is a broken line cone with the lightning rod as the axis. DL/T620-997 "Overvoltage Protection and Insulation Coordination of AC Electrical Devices" stipulates the protection range of a single lightning rod. "Rolling ball method" is one of the methods recommended by the International Electrotechnical Commission (IEC) to calculate the protection range of lightning arrester. China's building lightning protection code GB50057- 1994Z also adopts "rolling ball method" as a method to calculate the protection range of lightning rod. The rolling ball method is that a sphere with a radius of hR rolls along the part that needs lightning protection. When the sphere only contacts the lightning receptor (including the metal used as the lightning receptor) or only contacts the lightning receptor and the ground (including the metal that contacts the ground and can withstand lightning strikes), this part will be protected by the lightning receptor. In recent years, the "rolling ball method" stipulated in the national standard has also begun to be recognized by the industry, but in practical application, the "rolling ball method" has also encountered some problems, especially when calculating the protection range of lightning rods. Generally speaking, these two algorithms have their own characteristics, and the "rolling ball method" is more commonly used in high-rise buildings. 2. Is it foolproof to use a lightning rod that discharges in advance? In fact, any lightning protection equipment is not foolproof. It is not that there is no lightning strike within the protection range, but that the energy of lightning strike is small. From an economic point of view, it would be a waste to be foolproof. Therefore, the Code for Lightning Protection Design of Buildings and other design codes and standards require "reducing" lightning strikes. Therefore, the lightning protection safety of lightning protection devices designed according to national and international standards is not 100%. In addition to direct lightning, high-rise buildings may also be affected by side lightning and induced lightning. Early discharge lightning rod has two main advantages. First, it can discharge in advance, which has better lightning attracting performance than ordinary lightning rods. Secondly, conversion of time the early discharge into the early discharge distance, which is equivalent to increasing the height of the lightning rod, thus increasing the protection radius. But there is still no way to prevent side lightning and induction lightning. 3. It is very important to ensure the discharge ability of lightning rod. Various lightning protection codes require the lightning rod to have an independent down lead, which can ensure the lightning current to leak into the earth quickly. Never listen to the advice of some informal manufacturers when buying, and connect the lightning rod to the grounding system of the building itself to save costs. 4. It is very important to choose a regular lightning protection manufacturer. Lightning rod is actually a lightning rod, so lightning protection engineering needs rigorous scientific calculation, and a little carelessness may lead to lightning strike. Therefore, when selecting the supplier of lightning rod, it is necessary to examine whether it has the design qualification and construction qualification of lightning protection engineering. The domestic lightning rod market is mixed, and some dealers who represent foreign brands advertise that their products meet foreign advanced standards, among which it is difficult to distinguish between true and false. It is recommended to inspect the products according to national standards and IEC standards when purchasing. Want to know more information and price of lightning rod, you can consult Henan Ziqing Electrical Equipment Co., Ltd., thank you!