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Magnetic Fields and Induced Voltages in case of a Direct Strike - Comparison of Results obtained from Measurements at a Scaled Building to those of IEC 62305-4

  • In the paper the results obtained from experiments at a modelled reinforced building in case of a direct lightning strike are compared with calculations. The comparison includes peak values of the magnetic field Hmax, its derivative (dH/dt)max and of induced voltages umax in typical cable routings. The experiments are performed at a 1:6 scaled building and the results are extrapolated using the similarity relations theory. The calculations are based on the approximate formulae given in IEC 62305-4 and have to be supplemented by a rough estimation of the additional shielding effect of a second reinforcement layer. The comparison shows, that the measured peak values of the magnetic field and its derivative are mostly lower than the calculated. The induced voltages are in good agreement. Hence, calculations of the induced voltages based on IEC 62305-4 are a good method for lightning protection studies of buildings, where the reinforcement is used as a grid-like electromagnetic shield.
  • Auswirkungen eines direkten Blitzeinschlages auf ein Gebäude, Vergleich von experimentellen Ergebnissen und Berechnungen basierend auf einer Formel aus der IEC 62305-4

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Author:Alexander Kern, Fridolin Heidler, M. Seevers, Wolfgang J. Zischank
Document Type:Conference Proceeding
Year of Completion:2004
Publishing Institution:Fachhochschule Aachen
Contributing Corporation:International Conference on Lightning Protection <27, 2004, Avignon>
Date of the Publication (Server):2005/06/07
Tag:Direkter Blitzschlag; Elektromagnetischer Schutzschild; Induzierte Spannungen; Kalkulation; Magnetische Felder
Direct lightning strike; calculations; electromagnetic shield; induced voltages; magnetic fields
GND Keyword:Blitz
Journal of electrostatics: Beitr. auf S. 379 - 385. doi:10.1016/j.elstat.2006.09.004
Source:Selected papers from the 27th International Conference on Lightning Protection : Avignon, France, 13 - 16 September 2004 / ed. by V. Cooray. In: Journal of electrostatics ; 65.2007,5/6, IV S., S. 281 - 400
Institutes:FH Aachen / Fachbereich Energietechnik
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie