Summary

International Symposium on Electromagnetic Compatibility

2009

Session Number:24S3

Session:

Number:24S3-3

Lightning Current Distributions in LPS of a Building with a Radio Base Station on the Roof

R. Markowska,  

pp.845-847

Publication Date:2009/7/20

Online ISSN:2188-5079

DOI:10.34385/proc.14.24S3-3

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Summary:
The paper presents results of numerical calculations of lightning current distributions during direct strike to the antenna mast of a radio base station located on a building roof. The calculation results include current flows in the LPS (Lightning Protection System) of the building and in PE (Protective Earth) conductor of the supplying a.c. power line. It concentrates mainly on the effect of location of the struck antenna mast on the current distributions. The calculations have been performed using software based on electromagnetic field theory and method of moments, taking into account buried conductors and soil parameters. Lightning current distributions in buildings LPS have been studied so far extensively, however without the presence of RBS, its equipment and installations on the roofs. It is shown in the paper that the presence of the RBS on the building roof as well as the location of the struck antenna mast significantly affect the current distribution between the down conductors of the building LPS. The RBS presence causes this current distribution much more uniform. Neither the presence of the RBS nor the location of the struck mast influences the current which flows out via the PE conductor of the supplying a.c. power line.