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DOI: https://doi.org/10.15407/techned2016.03.018


Journal Tekhnichna elektrodynamika
Publisher Institute of Electrodynamics National Academy of Science of Ukraine
ISSN 1607-7970 (print), 2218-1903 (online)
Issue № 3, 2016 (May/June)
Pages 18 – 24


A.V. Bezprozvannych1, A.G. Kessaev1, M.A. Shcherba2*
1 – National Technical University "Kharkov Polytechnical Institute",
St. Bagaleia, 21, Kharkov, 61002, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
2 – National Technical University of Ukraine "Kyiv Polytechnical Institute",
pr. Peremohy, 21, Kyiv, 03056, Ukraine,
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ORCID ID: * http://orcid.org/0000-0001-6616-4567



It is shown that application of the high-frequency relaxation spectroscopy is expedient at the analysis of processes of appearance of free moisture in the polymeric insulation of power cables. The calculated and experimental frequency dependences of dielectric loss tangent on the degree of humidification of cable insulation are given. It is revealed that at prolonged moistening of insulation the peaks of relaxation losses are displaced into area of higher frequencies and there are the additional maxima corresponding to dispersion of energy dissipation in the new elements of insulation. The range of change of frequency of relaxation losses depends on concentration of free moisture in insulation and its electro-physical and morphological properties. References 19, figures 5, table 1.


Key words: polyethylene insulation, equivalent circuit, dielectric loss tangent, water micro-inclusions, treeing, dielectric spec-troscopy, relaxation processes.


Received:    21.12.2015
Accepted:     11.02.2016
Published:   25.04.2016



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