Author(s)

B. Jajac, D. Poljak & N. Kovač

Abstract

Boundary element modelling of the metalic post protection zone B. 3ajac1, D. poljak2 & N. ~0vai5' I Department of Electrical Engineering, University of Split, Croatia 2 Department of Electronics, University of Split, Croatia Abstract The boundary element analysis of the protection zone of a metallic post, as one of the most commonly used lightning protection devices is presented in the paper. The calculation of induced charge density is carried out via the potential coefficients approach. Some illustrative numerical results related to the various engineering applications are also presented. 1 Introduction Electromagnetic interferences (EMI) on electrical equipment are caused by a direct lightning strike or by an indirect discharge in a close proximity of the lightning channel [I]-[5]. Such lightning flash surges can produce adverse effects on electrical equipement. The key-point in the analysis of lightning protection devices is the determination of the protection zone. The protection zone is

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