Field tests: Performances of practical earthing systems under lightning impulses

Mohamad Nor, N. and Abdullah, S. and Rajab, R. and Ramar, K. (2013) Field tests: Performances of practical earthing systems under lightning impulses. International Journal of Electrical Power & Energy Systems, 45 (1). pp. 223-228. ISSN 01420615

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Official URL: http://dx.doi.org/10.1016/j.ijepes.2012.08.077

Abstract

In this paper, experimental test set and test results on the performance of practical earthing systems under high impulse currents are presented where the earthing systems consist of 3 earthing systems configurations, 2, 3 and 4 rod electrodes. Calibration tests using linear test load in order to validate the transducers adopted for this study are also discussed in this paper. This paper also presents the selection of the remote earth and some data from previously published work of the same site and earthing systems configurations under low magnitude currents and at power frequency. Soil ionisation characteristics on the real earthing systems were investigated. The performance of earthing systems are investigated based on its voltage and current shapes, earth pre- and post-ionisation resistance values and time delays. It was found that under impulse conditions, earthing systems behave differently where the earth resistance was found to be non-linear which are due to thermal and ionisation processes. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.

Item Type: Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 13 May 2013 04:51
Last Modified: 18 Feb 2014 06:48
URI: http://shdl.mmu.edu.my/id/eprint/3845

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