Generally, the grounding resistance of the lightning protection system should be less than 10Ω, and multiple grounding wires can be connected in parallel to connect to the ground. The minimum distance between each earth wire is 5 meters. When measuring, use a megger to connect one of the ground wires, extend it to 25 meters, measure the resistance and record it. Then connect another ground wire in parallel and measure the ground resistance in the same way (the measuring line is perpendicular to the ground wire connection wire).
It is necessary to go through administrative approval procedures for lightning protection. Wind towers are tall buildings that are easily affected by lightning. Lightning is a common natural phenomenon that can have a devastating impact on buildings and equipment. Therefore, in order to protect thes wind towers from lightning damage, it is necessary to go through this. administrative approval procedures for lightning protection and carry out the design and construction of lightning protection.