Factors affecting the price of lightning rod:
1 material
The main material cost of lightning rod is higher, which leads to the higher price of lightning rod, but its performance will be improved.
2. Quality
The price of lightning rod is also related to the quality. Simply put, if manufacturers cut corners to produce lightning rods, the price will be cheap, but relatively speaking, such products have defects in both quality and performance. Although the lightning rod produced by high-quality lightning rod materials is expensive, its quality and performance are good and guaranteed.
3. Type and model
Different types and models of lightning rods have different prices. This is because different types of lightning rods have different costs and production processes, resulting in different prices. Don't consider the price when buying a lightning rod, choose a lightning rod according to your own needs, and finally consider the price while ensuring the quality.
Extended data:
Precautions for purchase:
1, calculation method for reasonable selection of lightning rod protection range
The calculation methods of protection range of lightning rod (only referring to single needle here) 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 of more than 20 m.
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.
3. It is very important to ensure the discharge ability of lightning rod.
All kinds of lightning protection specifications require that the lightning rod has an independent down lead grounding, 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.