The University of Dublin | Trinity College -- Ollscoil Átha Cliath | Coláiste na Tríonóide
Trinity's Access to Research Archive
Home :: Log In :: Submit :: Alerts ::

TARA >
PEER Project >
PEER Publications >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/65619

Title: Investigation on creeping discharges propagating over epoxy resin and glass insulators in the presence of different gases and mixtures
Keywords: Physical Sciences
Issue Date: 1-Dec-2011
14-Nov-2011
Publisher: EDP Sciences
Abstract: Abstract This paper deals with the experimental characterization of discharges propagating over insulators of epoxy and glass, immersed in a gas or a gaseous mixture, under lightning impulse voltages (1.2/50 μs), using a point-plane electrode arrangement. The gases and mixtures we considered are SF6, N2, CO2, SF6-N2 and SF6-CO2. The morphology of creeping discharges and their final lengths are investigated versus the kind of insulator material, the amplitude and polarity of the voltage, the type of the gas (resp. mixture) and its pressure. It is shown that the shape of discharges and their final (stopping) lengths Lf depend significantly on the solid insulator and the type of gas. For given solid and gas, Lf increases quasi-linearly with the voltage and decreases when the gas pressure increases. The discharges do not always present a radial structure as reported in the literature. For given voltage and pressure, Lf is longer when the point electrode is positive than when it is negative while the initiation voltage of discharges is higher with a negative point than with a positive one; and Lf is longer with glass than with epoxy. Lf is shorter in SF6 than in CO2 or N2. On the other hand, the increase of SF6 content in SF6-CO2 mixture leads to a significant decrease of Lf. Therefore, the addition of small concentration of SF6 in a given gas mixture improves the dielectric strength of insulating structure.
URI: http://hdl.handle.net/2262/65619
ISSN: 1286-0042 (pISSN)
1286-0050 (eISSN)
1286-0042 (ISSN)
DOI: 10.1051/epjap/2011110122
Rights: © EDP Sciences, 2011
EDP Sciences, 2011
Affiliation: 36 avenue Guy de Collongue - 69134 - Écully - FRANCE (Beroual, A.)
Riyadh - (Beroual, A.)
129, avenue de Paris - 91300 - Massy - FRANCE (Coulibaly, M.L.)
130, rue Léon Blum - 69611 - Villeurbanne Cedex - FRANCE (Aitken, O.)
130, rue Léon Blum - 69611 - Villeurbanne Cedex - FRANCE (Girodet, A.)
Appears in Collections:PEER Publications

Files in This Item:

File Description SizeFormat
PEER_stage2_10.1051%2Fepjap%2F2011110122.pdf7.21 MBAdobe PDFView/Open


This item is protected by original copyright


Please note: There is a known bug in some browsers that causes an error when a user tries to view large pdf file within the browser window. If you receive the message "The file is damaged and could not be repaired", please try one of the solutions linked below based on the browser you are using.

Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback