NDLI: Experiments on paper insulation in a corona environment

Content Provider	IEEE Xplore Digital Library
Author	Lee, T.S. Fung, B.K. Zang Ming
Copyright Year	1972
Abstract	Insertion of an insulating paper between point-plane electrodes normally increases the total breakdown potential threshold, except when its position is next to the plane. A series of DC [both (+) and (-)] experiments was designed and conducted to examine this latter distinction. It was found that visual ionic spots on the paper surface are a dominant prebreakdown phenomenon. Local failure at one of such discrete spots ultimately brings about a streamer sparkover in air at a sufficiently high potential. This paper describes the variability and other characteristics of the pattern in a two-dimensional spot distribution. Related experiments reveal that, with double paper layers already in the barrier, the pattern of spots becomes less dense visually but the breakdown potential would increase for the case of (+) point but would decrease further for the case of (-) point if a third sheet is introduced. A sharply defined "dark" band on the double-layer side in which glow spots are absent was always observed to clearly bridge the separate domains of, respectively, single-layer and double-layer spot distributions. Also related were the mechanical agitations of the paper accompanying all phases of the different discharge activities.
Sponsorship	IEEE Industry Applications Society
Starting Page	772
Ending Page	777
Page Count	6
File Size	113892
File Format	PDF
ISSN	00939994
Volume Number	37
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Corona Electrodes Electric breakdown Dielectrics and electrical insulation Surface discharges Electrostatics Industry Applications Society Ionization Bridge circuits Composite materials
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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