Ambiguity of grounding specifications: IEC 62305 revisited

Grounding issues related to lightning currents have been addressed giving special attention to recommended practices in IEC 62305 (2010). Unambiguous recommendations are needed for the requirement of type A system or type B system or both systems for a given installation. Specifications of the lengt...

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Main Authors: Siow, Chun Lim, Ab Kadir, Mohd Zainal Abidin, Gomes, Chandima, Jasni, Jasronita
Format: Conference or Workshop Item
Language:English
Published: IEEE 2012
Online Access:http://psasir.upm.edu.my/id/eprint/39617/1/Ambiguity%20of%20grounding%20specifications%20IEC%2062305%20revisited.pdf
http://psasir.upm.edu.my/id/eprint/39617/
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Institution: Universiti Putra Malaysia
Language: English
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spelling my.upm.eprints.396172019-11-20T04:20:42Z http://psasir.upm.edu.my/id/eprint/39617/ Ambiguity of grounding specifications: IEC 62305 revisited Siow, Chun Lim Ab Kadir, Mohd Zainal Abidin Gomes, Chandima Jasni, Jasronita Grounding issues related to lightning currents have been addressed giving special attention to recommended practices in IEC 62305 (2010). Unambiguous recommendations are needed for the requirement of type A system or type B system or both systems for a given installation. Specifications of the length of conductors, based on the level of protection, were critically analyzed emphasizing the human risk related issues. Calculations reveal that at Level III and IV, the specified lengths of type A conductors may give step potentials, especially in highly resistive soils that may drive currents through human beings in the vicinity, exceeding lethal energy. Furthermore, specification of the limiting value of resistance for transient grounding systems may lead to hazardous situations as the difference between frequency dependent impedance and low frequency resistance may increase to very high values at Mega Hertz range where lightning energy spectrum has significant amplitude. Covering of a sizable surface area surrounding the grounding conductors with insulation material, is recommended as a practical solution to this issue. IEEE 2012 Conference or Workshop Item NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/39617/1/Ambiguity%20of%20grounding%20specifications%20IEC%2062305%20revisited.pdf Siow, Chun Lim and Ab Kadir, Mohd Zainal Abidin and Gomes, Chandima and Jasni, Jasronita (2012) Ambiguity of grounding specifications: IEC 62305 revisited. In: International Conference on Lightning Protection (ICLP), 2-7 Sept. 2012, Vienna, Austria. . 10.1109/ICLP.2012.6344293
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Grounding issues related to lightning currents have been addressed giving special attention to recommended practices in IEC 62305 (2010). Unambiguous recommendations are needed for the requirement of type A system or type B system or both systems for a given installation. Specifications of the length of conductors, based on the level of protection, were critically analyzed emphasizing the human risk related issues. Calculations reveal that at Level III and IV, the specified lengths of type A conductors may give step potentials, especially in highly resistive soils that may drive currents through human beings in the vicinity, exceeding lethal energy. Furthermore, specification of the limiting value of resistance for transient grounding systems may lead to hazardous situations as the difference between frequency dependent impedance and low frequency resistance may increase to very high values at Mega Hertz range where lightning energy spectrum has significant amplitude. Covering of a sizable surface area surrounding the grounding conductors with insulation material, is recommended as a practical solution to this issue.
format Conference or Workshop Item
author Siow, Chun Lim
Ab Kadir, Mohd Zainal Abidin
Gomes, Chandima
Jasni, Jasronita
spellingShingle Siow, Chun Lim
Ab Kadir, Mohd Zainal Abidin
Gomes, Chandima
Jasni, Jasronita
Ambiguity of grounding specifications: IEC 62305 revisited
author_facet Siow, Chun Lim
Ab Kadir, Mohd Zainal Abidin
Gomes, Chandima
Jasni, Jasronita
author_sort Siow, Chun Lim
title Ambiguity of grounding specifications: IEC 62305 revisited
title_short Ambiguity of grounding specifications: IEC 62305 revisited
title_full Ambiguity of grounding specifications: IEC 62305 revisited
title_fullStr Ambiguity of grounding specifications: IEC 62305 revisited
title_full_unstemmed Ambiguity of grounding specifications: IEC 62305 revisited
title_sort ambiguity of grounding specifications: iec 62305 revisited
publisher IEEE
publishDate 2012
url http://psasir.upm.edu.my/id/eprint/39617/1/Ambiguity%20of%20grounding%20specifications%20IEC%2062305%20revisited.pdf
http://psasir.upm.edu.my/id/eprint/39617/
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