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Characteristics of fulgurite-like structures under HV conditions: effects on electrical earthing systems


Citation

Burhanuddin, Zulkifli and Gomes, Chandima and Gomes, Ashen and Ab Kadir, Mohd Zainal Abidin and Wan Ahmad, Wan Fatinhamamah and Azis, Norhafiz (2016) Characteristics of fulgurite-like structures under HV conditions: effects on electrical earthing systems. In: 2016 33rd International Conference on Lightning Protection (ICLP), 25-30 Sept. 2016, Estoril, Portugal. .

Abstract / Synopsis

Fulgurites are natural tubes of glass formed by the fusion of silica sand or rock from a lightning strike. The fulgurites have been produced artificially in HV conditions in the past. Recent studies have found that fulguritic structures can be formed in some other materials, such as bentonite and cement, as well. These fulgurites can change the overall physical and electrical properties of the original materials. Thus, formation of fulgurites can modify the performance of electrical earthing systems, both ordinary and those improvised with backfill materials. This study investigates the fulgurite formation under alternating, direct and impulse current application. Bentonite and sand were tested under high voltage conditions. The type of fulgurites and their effects on electrical earthing systems were studied by analyzing the resistivity and permittivity of original materials and fulgurites. It has been found that fulgurites formation has a severe effect on the earth resistance of grounding systems.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1109/ICLP.2016.7791435
Publisher: IEEE
Keywords: Bentonite; Fulgurites; High voltage; Impulse current introduction; Resistivity
Depositing User: Nabilah Mustapa
Date Deposited: 30 Jun 2017 17:56
Last Modified: 30 Jun 2017 17:56
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/ICLP.2016.7791435
URI: http://psasir.upm.edu.my/id/eprint/55942
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