Rolling Sphere Method Calculator (2024)

: The tool instantly shows that at 19 m separation, the top 0.8 m of the arrester remains exposed. You then add a second mast, and the overlapping spheres create full protection up to 28 m separation.

Introduction

: Using the formula, the maximum distance is ≈ 18.7 m. rolling sphere method calculator

: How far can the arrester be from the mast? : The tool instantly shows that at 19

[ d \leq \sqrtr^2 - (h - r)^2 - \sqrtr^2 - (H - r)^2 ] : How far can the arrester be from the mast

For decades, the protection of structures against direct lightning strikes has relied on a few key geometric models. Among them, the stands out as the most intuitive and physically accurate representation of how lightning intercepts a structure. Unlike the older "cone of protection" method, RSM accounts for the actual striking distance of lightning, making it indispensable for protecting complex or sensitive facilities like substations, data centers, petrochemical plants, and tall buildings.