NDLI: Investigations on cavities inside liquid-immersed paper and pressboard insulation materials and their influence on the electrical behavior

Content Provider	IEEE Xplore Digital Library
Author	Wasserberg, V. Krins, M. Borsi, H. Gockenbach, E.
Copyright Year	2000
Description	Author affiliation: Scherring-Inst. of High Voltage Tech. & Eng., Hannover Univ., Germany (Wasserberg, V.)
Abstract	Although the process of impregnating cellulosic materials with liquid insulants is well known and has been in use for many decades sometimes problems with gas-filled cavities inside the impregnated material still arise. Therefore extensive experimental investigations on the effects of gas-filled cavities inside an impregnated pressboard, like they appear after an imperfect impregnation, have been performed. The filling of hidden voids with surrounding insulation liquid during and after impregnation process was examined and the results are presented in this contribution. Using defined failures inside a transformerboard also the influence of these defects on the electrical behavior of the insulation in a semi-uniform field was simulated.
Starting Page	422
Ending Page	425
File Size	442301
Page Count	4
File Format	PDF
ISBN	0780359313
ISSN	1089084X
DOI	10.1109/ELINSL.2000.845539
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-04-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectric liquids Power transformer insulation Dielectrics and electrical insulation Gas insulation Power transformers Oil insulation Manufacturing Partial discharges Filling Petroleum
Content Type	Text
Resource Type	Article

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