NDLI: Surface charge accumulation on insulating plates in SF/sub 6/ and the effect on DC and AC breakdown voltage of electrode arrangements

Content Provider	IEEE Xplore Digital Library
Author	Winter, A. Kindersberger, J.
Copyright Year	2002
Description	Author affiliation: Inst. of High Voltage Eng. & Electr. Power Transmission, Technische Univ. Munchen, Germany (Winter, A.; Kindersberger, J.)
Abstract	Surface charge accumulation on insulating materials, which are located next to electrodes in electrical devices may lead to a change of the electrical field. In some cases the breakdown voltage of electrode arrangements could be exceeded. For the investigations an insulating plate made from PTFE was used. The test set-up allows to charge the specimen, to measure the charge density distribution and to verify the effect of charge on the breakdown voltage of an electrode arrangement. The test set-up was installed into a test vessel to study the effects under SF/sub 6/. As a result the formation of a bipolar electrical charge double layer with charge densities of up to -18 nC/cm/sup 2/ on the upper surface of the specimen and up to +15 nC/cm/sup 2/ on the opposite surface was determined. The formation of a bipolar electrical charge double layer could be simulated by numerical field calculation. Placing the charged specimen next to a rod-electrode arrangement causes a reduction of the AC and DC breakdown voltage up to more then 20%.
Starting Page	757
Ending Page	761
File Size	377432
Page Count	5
File Format	PDF
ISBN	0780375025
DOI	10.1109/CEIDP.2002.1048906
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-20
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Density measurement Current measurement Charge measurement Surface discharges Testing Probes Dielectrics and electrical insulation Surface charging Position measurement
Content Type	Text
Resource Type	Article

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