Lightning protection facilities include two parts: external lightning protection (direct lightning protection for buildings or facilities) and internal lightning protection (protection against lightning electromagnetic pulses):
The external lightning protection system is mainly used to protect the building itself from fire accidents and personal safety accidents caused by direct lightning strikes; The internal lightning protection system is designed to prevent damage caused by lightning wave invasion, lightning induced overvoltage, and system operation overvoltage invasion of equipment
Lightning protection devices mainly consist of lightning arresters (collectively referred to as lightning rods and lightning strips), down conductors, and grounding.
Especially when the grounding is buried underground, the down lead is often blown by rain and wind, and is prone to fracture and detachment due to corrosion over the years. As a result, the lightning energy received by the lightning arrester cannot be consumed by entering the ground through grounding, making it more likely to cause harm to buildings and personnel.
External lightning protection devices mainly consist of lightning rods, lightning strips, lightning grids, and lightning wires, among which lightning rods are common direct lightning protection devices
When a thunderstorm discharge approaches the ground, it causes distortion of the ground electric field, forming a space with concentrated local electric field strength at the top of the lightning rod, which affects the development direction of lightning lead discharge, guides lightning to discharge towards the lightning rod, and then introduces lightning current to the ground through grounding down conductors and grounding devices, thereby protecting the protected object from lightning damage
Function of testing report:
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1. Telephone communication and confirmation of requirements
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1. The testing industry is fully covered, meeting different testing needs
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