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On the Characterisations of the Impulse Breakdown in High Resistivity Soils by Field Testing

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  • Abdul Wali Abdul Ali

    (Faculty of Engineering, Multimedia University, Cyberjaya 63100, Selangor, Malaysia)

  • Normiza Mohamad Nor

    (Faculty of Engineering, Multimedia University, Cyberjaya 63100, Selangor, Malaysia)

Abstract

This paper presents experimental results of high-current impulse tests on six ground electrode configurations. A high impulse current generator is employed to inject different magnitudes of current into these rod electrodes, under both positive and negative impulse polarities. The effect of increasing the number of rod electrodes, hence the resistance at DC or steady-state (RDC), on the impulse response of ground electrodes is analysed. From the analysis of the results, it was found that the larger the size of rod electrodes, the less current-dependent Z impulse becomes. The percentage of reduction of impulse impedance, Z impulse from its steady state, and R DC values are found to be independent of impulse polarity. However, as the voltage magnitudes were increased, an occurrence of breakdown was seen, with higher breakdown voltage seen in negative impulse polarity in comparison to positive impulse polarity. Relatively, the higher the breakdown voltage is, seen in the ground electrodes subjected to negative polarity, the faster the time to breakdown is.

Suggested Citation

  • Abdul Wali Abdul Ali & Normiza Mohamad Nor, 2021. "On the Characterisations of the Impulse Breakdown in High Resistivity Soils by Field Testing," Energies, MDPI, vol. 14(9), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2401-:d:542004
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    References listed on IDEAS

    as
    1. Abdul Wali Abdul Ali & Nurul Nadia Ahmad & Normiza Mohamad Nor & Muhd Shahirad Reffin & Syarifah Amanina Syed Abdullah, 2019. "Investigations on the Performance of a New Grounding Device with Spike Rods under High Magnitude Current Conditions," Energies, MDPI, vol. 12(6), pages 1-18, March.
    2. Muhd Shahirad Reffin & Normiza Mohamad Nor & Nurul Nadia Ahmad & Syarifah Abdullah, 2018. "Performance of Practical Grounding Systems under High Impulse Conditions," Energies, MDPI, vol. 11(11), pages 1-16, November.
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    Cited by:

    1. Hanis Hamizah Hizamul-Din & Normiza Mohamad Nor, 2021. "Analysis of Zinc Oxide (ZnO) Surge Arrester Connected to Various Ground Electrodes," Energies, MDPI, vol. 14(12), pages 1-19, June.
    2. Muhd Shahirad Reffin & Normiza Mohamad Nor & Nurul Azlina Abdul Rahman & Noradlina Abdullah & Norhasliza Hatta & Mohd Pauzi Yahaya, 2022. "Effectiveness of Large Soil Grain Sizes in Studying Impulse Characteristics of Soil," Energies, MDPI, vol. 15(4), pages 1-17, February.
    3. Normiza Mohamad Nor, 2023. "Review: Factors Affecting the Performance of Ground Electrodes under High Impulse Currents," Energies, MDPI, vol. 16(10), pages 1-13, May.

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