The outer protection range formed by the three equal height lightning rods is determined by the calculation method of the two equal height lightning rods. If the minimum width bx ≥ 0 on the side of the protective range between the three lightning rods inside the adjacent lightning rods, the entire area is protected. A quadrilateral or polygon composed of four or more lightning rods of the same height can be divided into two or more triangles, and then three protective rods of the same height are used to calculate and determine the protection scope.
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