Lightning hazards can be broadly classified into direct lightning strikes, inductive lightning and lightning wave intrusion. The lightning rod can only prevent the direct lightning strike, but the inductive lightning caused by the strong electromagnetic field change caused by lightning and the overvoltage and overcurrent induced by the conductor is powerless. The magnitude of these induced voltages varies with the shape of the metal and the ground. The distance between the line and the size of the lightning strike varies. According to the standard, when a lightning strikes a building, even if a lightning rod is installed, about 50% of the lightning energy will be distributed to the power system. Inductive lightning along the antenna feeder, signal line, power line and other electrical conductors, enter the building's internal low-voltage distribution system in the weak electrical equipment, causing significant economic losses.
Elevator lightning protection status:
According to Article 3.1.1 of the Code for Lightning Protection of Buildings, all types of lightning protection buildings shall adopt measures to prevent direct lightning strikes and lightning protection.
At this stage, buildings generally require lightning protection measures on both the exterior and interior of the building. Lightning protection outside the building, including the installation of lightning rods (air receptors), laying lightning protection grounding grid, lightning protection inside the building, including grounding, equipotential bonding, shielding, and installation of surge protection devices (SPD).
This article tags: elevator, rainproof, lightning protection