Danger of a lightning rod connected to a wire line?
Lightning is a very complex problem, can not rely on one or two kinds of advanced mine equipment and lightning protection measures can completely eliminate the influence of lightning overvoltage and the induced overvoltage, according to lightning invasion routes, the exclusion of all kinds of factors may produce lightning, adopt comprehensive prevention of lightning, equalizing, shielding, grounding and shunt (protection), lightning can be reduced to a minimum.
Modern lightning protection includes external lightning protection (lightning protection of buildings or facilities) and internal lightning protection (lightning electromagnetic pulse protection) two parts, external lightning protection system is mainly to protect buildings from direct lightning caused fire accidents and safety accidents, and internal lightning protection system is to prevent the intrusion of lightning wave, voltage and system the lightning induced overvoltage damage caused by invasiveequipment. This is the external lightning protection system can not be guaranteed.
To counter the phenomenon of lightning usually refers to the metal body of direct lightning stroke (including flash grounding device, grounding and grounding), in a flash and the earth exists between a high voltage, this voltage discharge occurs on other metal objects and the earth connection (also called the phenomenon is called back flashover). In addition, when lightning strikes trees, there is a counterattack between the high voltage on the trees and the houses and metal objects around it. In order to eliminate the counterattack phenomenon, usually take two measures: one is the equipotential connection, with metal conductor connecting two metal conductors, the lightning is equal to the potential; two is to maintain a certain distance between the two.
