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...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
IEEE
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/39617/1/Ambiguity%20of%20grounding%20specifications%20IEC%2062305%20revisited.pdf |
| _version_ | 1825949443551133696 |
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| author | Siow, Chun Lim Ab Kadir, Mohd Zainal Abidin Gomes, Chandima Jasni, Jasronita |
| author_facet | Siow, Chun Lim Ab Kadir, Mohd Zainal Abidin Gomes, Chandima Jasni, Jasronita |
| author_sort | Siow, Chun Lim |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T08:44:39Z |
| format | Conference or Workshop Item |
| id | upm.eprints-39617 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:44:39Z |
| publishDate | 2012 |
| publisher | IEEE |
| record_format | dspace |
| spelling | 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 |
| spellingShingle | Siow, Chun Lim Ab Kadir, Mohd Zainal Abidin Gomes, Chandima Jasni, Jasronita Ambiguity of grounding specifications: IEC 62305 revisited |
| title | 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_short | Ambiguity of grounding specifications: IEC 62305 revisited |
| title_sort | ambiguity of grounding specifications iec 62305 revisited |
| url | http://psasir.upm.edu.my/id/eprint/39617/1/Ambiguity%20of%20grounding%20specifications%20IEC%2062305%20revisited.pdf |
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