On the Mineral and Vegetal Oils Used as Electroinsulation in Transformers

Due to the relatively large availability and reduced price, the mineral transformer oils are widely used as electrical insulating liquids. However, mineral oil drastically degrades over time in service. New efforts were made to improve mineral oils characteristics, and other types of liquids like ve...

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Bibliographic Details
Published inEmerging Trends in Technological Innovation pp. 435 - 442
Main Authors Şerban, Mariana, Sângeorzan, Livia, Helerea, Elena
Format Book Chapter
LanguageEnglish
Published Berlin, Heidelberg Springer Berlin Heidelberg 2010
SeriesIFIP Advances in Information and Communication Technology
Subjects
electrical breakdown testing
electrode effect
Mineral oil
statistic processing
vegetal oil
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Summary:Due to the relatively large availability and reduced price, the mineral transformer oils are widely used as electrical insulating liquids. However, mineral oil drastically degrades over time in service. New efforts were made to improve mineral oils characteristics, and other types of liquids like vegetal oils are proposed. This paper deals with new comparative tests on mineral and vegetal oils using as indicator the electric strength. The samples of non-additive mineral oil type TR 30 and vegetal oils of rape, sunflower and corn have been tested with increasing voltage of 60 Hz using different electrodes. The obtained data have been statistical processed. The analyze shows different average values of electrical strength for the different type of sample. New method of testing through electrical breakdown is proposed. Experimental data confirms that it is possible to use as electroinsulation organic vegetal oils in power transformers.
ISBN:9783642116278
3642116272
ISSN:1868-4238
1868-422X
DOI:10.1007/978-3-642-11628-5_48