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An electrical discharge of very short duration and high voltage between the cloud and the ground or inside a cloud, accompanied by a Flash of bright and usually also the Thunder. The question of protecting buildings from lightning is now more than ever. In addition to the fire and the destruction of the building, as well as human destruction, added risk of damage to electrical equipment. An internal surge protection devices allow you to keep electrical appliances unharmed, but does not exclude other undesirable effects of lightning. Only the simultaneous use of external and internal lightning protection will be assured of protection.
Active lightning protection system is the latest development. It allows you to provide security in a much larger area, and does not require constant maintenance and has a compact, unobtrusive appearance. The basis for the work of active lightning protection is based on the principle of air ionization located around the rod. In contrast to the external and internal lightning protection system provides for wiring a cascade system overvoltage limiters. Its main purpose is to protect the building from the effects of disturbances in power supply system and engineering and communication networks.