NDLI: Oil Gap dependence of partial discharge starting point in the oil/pressboard composite insulation system

Content Provider	IEEE Xplore Digital Library
Author	Umemoto, T. Kainaga, S. Tsurimoto, T. Muto, H. Ishikura, T. Sugitani, N. Morita, N. Kozako, M. Hikita, M.
Copyright Year	2012
Description	Author affiliation: Mitsubishi Electric Corporation, Japan (Umemoto, T.; Kainaga, S.; Tsurimoto, T.; Muto, H.; Ishikura, T.) \|\| Kyushu Institute of Technology, Japan (Sugitani, N.; Morita, N.; Kozako, M.; Hikita, M.)
Abstract	This paper deals with the impulse PD (partial discharge) characteristics in oil/pressboard composite insulation systems. We examined the PD starting point in test samples with the oil gap length varied from 1.6 mm to 9.6 mm, which simulated the oil duct in an oil-immersed transformer. Consequently, we found that when the oil gap length was below 4.8 mm, the PD starting point shifted from the oil gap to creepage of a spacer when the oil gap length increased. On the other hand, when the oil gap length was over 4.8 mm, the PD starting point shifted from creepage of a spacer to the oil gap as the oil gap length increased. These results of experiments can be explained by considering the volume effect of the transformer oil and assuming that the fibrous protrusions on the surface of the pressboard had an influence.
Starting Page	1
Ending Page	5
File Size	470743
Page Count	5
File Format	PDF
ISBN	9781467323277
e-ISBN	9784886860774
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-21
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	IEEJ Industry Applications Society
Subject Keyword	Partial discharges Electric fields Oil insulation Power transformer insulation Electrodes Partial Discharge Transformer oil Pressboard
Content Type	Text
Resource Type	Article

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