Sét là một hiện tượng thiên nhiên thường xuất hiện vào những mùa giông bão. Nguồn điện từ tia sét có công suất cực kỳ lớn và có khả năng gây hại đến sức khỏe, tính mạng con người cũng như các vật dụng, các công trình…
In order to avoid the risks caused by lightning, many households, many investors, and construction sites have installed lightning protection columns to protect the safety of buildings, equipment, and people.
Lightning poles play an important role in the lightning protection system, including:
– Lightning needle
– Lightning conductor
– Ground rod and ground wire
– Other supplies (needle base and post, anchor wire, etc.)
These parts are welded together, ensuring the transmission of the entire lightning current from the lightning rod to the ground, which has the effect of protecting buildings, houses, etc. When struck by lightning, the lightning protection system is effective. Immediately transfer the current from the lightning rod to the ground without destroying the structure, or causing danger to people.
Lightning is both thermal and negative, and the intensity of each lightning bolt is difficult to predict. Therefore, to protect electrical equipment and family members before, during, and after the stormy season, it is advisable to install a standard system of fuses and an aptomat to avoid fire, short-circuit, and damage to items and equipment. When there is a thunderstorm, it is advisable to turn off and unplug equipment (including antennas and equipment connecting the pan) to avoid lightning from entering the electrical system, causing damage and complete paralysis of electrical machinery (electronic ; avoid standing near doors, walls, wet areas, ponds, etc.
Lightning poles are usually placed on the roof at a high position and are led directly to the grounding system by the lightning conductor.
To make a lightning arrester, it is necessary to pay attention to the following points:
– Lightning arrrester needs to be installed in a high position to increase the protection range. However, it should not be installed too high because it may be tilted or overturned by storm winds, losing the effect and bearing capacity of the column.
– Bases and poles supporting lightning rods are usually made of zinc-coated clay with a diameter of 60mm and a length of more than 2m.
– Dây dẫn sét nối từ cột chống sét xuống đất được làm từ dây đồng trần hay các loại cáp thoát sét chống nhiễu (Cáp ERICORE của hãng ERICO).
Depending on the conditions and characteristics of each building and house, there is a specific calculation, design, and installation to ensure optimal safety for the building and its users.