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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

  • 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.

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Metadaten
Author:Alexander Kern, Anahita Imani Vashiani, Tobias Timmermanns
DOI:https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627465
ISBN:978-1-6654-2346-5
Parent Title (English):35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA)
Publisher:IEEE
Document Type:Conference Proceeding
Language:English
Year of Completion:2021
Date of the Publication (Server):2022/01/06
Tag:Lightning protection system; down-conductor; metal façade; steel columns; touch voltage
Length:8 Seiten
Note:
35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA), 20-26 Sept. 2021, Colombo, Sri Lanka
Link:10.1109/ICLPandSIPDA54065.2021.9627465
Zugriffsart:campus
Institutes:FH Aachen / Fachbereich Energietechnik
FH Aachen / Freshman Institute