There are many kinds of modern lightning protection products, which can be roughly divided into these categories

Lightning arrester

The lightning rod is the earliest lightning arrester and the most mature lightning protection device recognized in the world. Lightning strip, lightning network and lightning wire are the deformation of lightning rod, and their lightning receiving principles are consistent. The understanding of lightning receiving principle of lightning rod has a development process. The theory of rolling ball method comprehensively explains various phenomena that lightning arrester attracts lightning, which is adopted by domestic and foreign standards.

Lightning eliminator

Lightning eliminator is a lightning protection product with great influence in China in recent years. It is hoped to change the material and shape of the lightning arrester to generate the charge in the current integrated lightning cloud, so that the lightning cloud cannot establish the field strength required for lightning protection within the protection range of the lightning eliminator, so as to achieve the purpose of lightning elimination. Because the claimed effect of lightning eliminator completely meets the lightning protection effect that people want, lightning eliminator has been popular in the domestic market for a period of time.

Grounding device

Grounding is the foundation of lightning protection. The grounding method specified in the standard is to lay horizontal or vertical grounding electrodes with metal profiles. In areas with strong corrosion, the method of galvanizing and increasing the cross-sectional area of metal profiles can be used to resist corrosion, or non-metallic conductors can be used as grounding electrodes, such as graphite grounding electrodes and Portland cement grounding electrodes.

Downlead

When the lightning arrester receives lightning, a large amount of lightning current enters the ground through the downlead, which will produce inductive lightning in the surrounding conductor, so the downlead with shielding effect is pushed out. It must be pointed out that the inductive lightning is mainly caused by the electrostatic induction of the thundercloud. Only shielding the downlead has little effect, but the shielding effect of all wires must be strengthened to weaken the inductive lightning.