How can a pole be struck by lightning?
The general high voltage line or a high-voltage wire tower has a special lightning line, lightning arrester are equipped with high voltage line, low voltage wire rod are generally not set up special lightning protection devices, but in the end there are equipment arresters as lightning protection device.
Lightning: there are many forms, take in the building, tied reinforced to breakpoint lightning reinforced column and beam welding up until the top, and in a layer of a monitoring point, the use of the power distribution system of contact left in the total distribution room room on the roof of the parapet wall or lining ring link and, as a lightning rod link on the roof of a lightning rod device to high equipment and building lightning protection network link. Both are similar. They are all for one purposeLightning is mainly thermal damage, the current is too large
Lightning line: high-voltage transmission line tower on top of two line is lightning line, the principle is that when lightning strikes when the most rapid decomposition and release of lightning surge protection, power grid and tower, mainly to release lightning current into the earth. In substation, transformer lightning protection construction, use angle iron and other conductor buried in the ground and extend 10-20 meters, if the resistance is too high, also need to spray sodium chloride buried.
