Why can lightning rod protect against direct lightning?
Because the lightning rod is connected with the grounding device through the lead wire. The lightning current strikes on the lightning rod, and its energy is quickly reached through the lead wire to the grounding device and eliminated in the ground so that the protection can not be damaged.
Lightning rod specifications must comply with the GB standard, each lightning protection category required lightning rod height specifications are different. When the thunder discharge close to the ground when it makes the ground electric field distortion. At the top of the lightning rod, the formation of local electric field concentration space, to influence the development direction of the lightning discharge, leading to the lightning arrester, the grounding wire and a grounding device of the lightning current into the earth, so that the protected object against lightning.
Lightning conductor, also known as lightning protection needle, is used to protect buildings, tall trees and other devices to avoid lightning strikes. A lightning arrester is installed at the top of the protected object and connected with the specification wire and the underground leakage net buried in the ground.
