Abstract
Based on the positions of classical and quantum electrodynamics, this paper shows that when a direct, alternating or pulsed current of high density (100 A/mm2 or more) flows in emergency situations through metal electrical pathways of power electrical equipment, such electrical pathways in areas of their narrow “hot” longitudinal sections may experience intense local heating. It was found that Joule heating temperatures, which occur in this situation on the “hot” longitudinal sections of the electrical pathways due to periodic localization of electrons on them, are higher by up to 3.5 times than the corresponding temperatures on their adjacent “cold” sections and may lead to electrothermal destruction of these electrical pathways. Experiments confirmed the main results of calculations.
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Original Russian Text © M.I. Baranov, 2014, published in Elektrotekhnika, 2014, No. 6, pp. 13–17.
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Baranov, M.I. Local heating of electrical pathways of power electrical equipment under emergency conditions and overcurrents. Russ. Electr. Engin. 85, 354–357 (2014). https://doi.org/10.3103/S1068371214060030
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DOI: https://doi.org/10.3103/S1068371214060030