Lightning Overvoltage between Building and Individual Groundings

Abstract

When a lightning strikes a building, potential difference may occur between different class grounding electrodes. Due to the potential difference, electrical equipment inside the building might break down or malfunction. Therefore, it is important to estimate the level of lightning overvoltage as accurately as possible and establish protection methodologies. In this paper, lightning overvoltage between grounding of a building and an individual grounding is discussed by experiments using a 1/10 reduced-scale model and the FDTD (Finite Difference Time Domain) method.