Title:	Environmental impact and aging properties of natural and synthetic transformer oils under electrical stress conditions
Authors:	Kurzweil, Peter Schell, Christian Haller, Rainer Trnka, Pavel Hornak, Jaroslav
Citation:	KURZWEIL, P. SCHELL, CH. HALLER, R. TRNKA, P. HORNAK, J. Environmental impact and aging properties of natural and synthetic transformer oils under electrical stress conditions. Advanced Sustainable Systems, 2021, roč. 5, č. 8, s. 1-10. ISSN: 2366-7486
Issue Date:	2021
Publisher:	Wiley
Document type:	článek article
URI:	2-s2.0-85106208929 http://hdl.handle.net/11025/45603
ISSN:	2366-7486
Keywords in different language:	breakdown voltage;decomposition products;ecotoxicity;power transformer oils;vegetable oils
Abstract in different language:	Against the background of environmental compatibility and unrestricted technical usability, synthetic, and natural transformer oils are critically compared in long-term tests under high voltage using electrical and instrumental analytical methods. Synthetic alkyl esters of pentaerythrol appear to be sustainable and sometimes superior substitutes for mineral oils in terms of chemical stability, viscosity, permittivity, and heat transport. Natural esters of unsaturated fatty acids are found to be unsuitable for equipment exposed to moist air. Adsorbed water appears to be a general problem in transformer oils. The aging mechanisms and molecular changes during long-term operation include radical reactions, and the formation, isomerization and cleavage of CC bonds. Extensive material data are provided.
Rights:	© authors
Appears in Collections:	Články / Articles (RICE) Články / Articles (KET) Články / Articles (KEE) OBD

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