TY  - CHAP
A1  - Zischank, Wolfgang J.
A1  - Heidler, Fridolin
A1  - Kern, Alexander
A1  - Metwally, I. A.
A1  - Wiesinger, J.
A1  - Seevers, M.
T1  - Laboratory simulation of direct lightning strokes to a modelled building - measurement of magnetic fields and induced voltages
N2  - In IEC 61312-2 equations for the assessment of the magnetic fields inside structures due to a direct lightning strike are given. These equations are based on computer simulations for shields consisting of a single-layer steel grid of a given mesh width. Real constructions, however, contain at least two layers of reinforcement steel grids. The objective of this study was to experimentally determine the additional shielding effectiveness of a second reinforcement layer compared to a single-layer grid. To this end, simulated structures were set up in the high current laboratory. The structures consisted of cubic cages of 2 m side length with one or with two reinforcement grids, respectively. The structures were exposed to direct lightning currents representing the variety of anticipated lightning current waveforms. The magnetic fields and their derivatives at several positions inside the structure as well as the voltage between “floor” and “roof” in the center were determined for different current injection points. From these data the improvement of the shielding caused by a second reinforcement layer is derived.
KW  - Direkter Blitzschlag
KW  - Elektromagnetischer Schutzschild
KW  - Magnetische Felder
KW  - Induzierte Spannungen
KW  - Stahlbetonkonstruktion
KW  - Lightning
KW  - electromagnetic shielding
KW  - magnetic field
KW  - reinforced concrete
KW  - induced voltage
Y1  - 2002
ER  - 
TY  - CHAP
A1  - Birkl, Josef
A1  - Diendorfer, Gerhard
A1  - Kern, Alexander
A1  - Thern, Stephan
T1  - Extremely high lightning peak currents
T2  - 34th International Conference on Ligntning Protection, 02-07 September 2018
Y1  - 2018
SN  - 978-1-5386-6635-7
ER  - 
TY  - CHAP
A1  - Kern, Alexander
T1  - Optimierung des Blitzschutzes bei Biogasanlagen
T1  - Improvement of lightning protection for biogas plants
T2  - 12. VDE/ABB-Blitzschutztagung : Beiträge der 12. VDE/ABB-Fachtagung, 12.-13. Oktober 2017, Aschaffenburg
Y1  - 2017
SN  - 978-3-8007-4459-6
SP  - 48
EP  - 56
ER  - 
TY  - CHAP
A1  - Kern, Alexander
A1  - Brocke, Ralph
T1  - Planung von Fangeinrichtungen mit dem dynamischen elektro-geometrischen Modell - Mögliche praktische Anwendungen
T1  - Design of air-terminations using the dynamic electro-geometrical model - Possible practical applications
T2  - 12. VDE/ABB-Blitzschutztagung : Beiträge der 12. VDE/ABB-Fachtagung, 12.-13. Oktober 2017, Aschaffenburg
Y1  - 2017
SN  - 978-3-8007-4459-6
SP  - 75
EP  - 82
ER  - 
TY  - CHAP
A1  - Birkl, Josef
A1  - Diendorfer, Gerhard
A1  - Kern, Alexander
A1  - Thern, Stephan
T1  - Extrem hohe Blitzströme
T1  - Extremly high lightning currents
T2  - 12. VDE/ABB-Blitzschutztagung : Beiträge der 12. VDE/ABB-Fachtagung, 12.-13. Oktober 2017, Aschaffenburg
Y1  - 2017
SN  - 978-3-8007-4459-6
SP  - 146
EP  - 152
ER  - 
TY  - CHAP
A1  - Kern, Alexander
A1  - Imani Vashiani, Anahita
A1  - Timmermanns, Tobias
T1  - Threat for human beings due to touch voltages and body currents caused by direct lightning strikes in case of non-isolated lightning protection systems using natural components
T2  - 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA)
N2  - For typical cases of non-isolated lightning
protection systems (LPS) the impulse currents are investigated which may flow through a human body directly touching a structural part of the LPS. Based on a basic LPS model with conventional down-conductors especially the cases of external and internal steel columns and metal façades are considered and compared. Numerical simulations of the line quantities voltages and currents in the time domain are performed with an equivalent circuit of the entire LPS.
As a result it can be stated that by increasing the number of conventional down-conductors and external steel columns the threat for a human being can indeed be reduced, but not down to an acceptable limit. In case of internal steel columns used as natural down-conductors the threat can be reduced sufficiently, depending on the low-resistive connection of the steel columns to the lightning equipotential bonding or the earth termination system, resp. If a metal façade is used the threat for human beings touching is usually very low, if the façade is sufficiently interconnected and multiply connected to the lightning equipotential bonding or the earth termination system, resp.
KW  - Lightning protection system
KW  - down-conductor
KW  - steel columns
KW  - metal façade
KW  - touch voltage
Y1  - 2021
SN  - 978-1-6654-2346-5
U6  - http://dx.doi.org/10.1109/ICLPandSIPDA54065.2021.9627465
N1  - 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA), 20-26 Sept. 2021, Colombo, Sri Lanka
PB  - IEEE
ER  -