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The resistance of plasma channel in transformer oil

Published online by Cambridge University Press:  26 February 2010

J. Kúdelčík
J. Kúdelčík*
Affiliation:
Department of Physics, The University of Žilina, Žilina, Slovakia
*
kudelcik@fyzika.uniza.sk
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Abstract

The initial state development of breakdown is explained on the basis of bubble theory. Application of dc voltage to electrodes immersed in oil results in the creation of small channels. In the next phase an arc channel between the electrodes is formed. Resistance of the plasma channel changes from a few ohms to a few hundreds mΩ due to Joule heating caused by high arc currents which flows through this channel. The dynamics of the arc current depends on the parameters of the outer circuit and is represented by the RLC circuit.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 50 , Issue 1: Focus on Electrical Contacts , April 2010 , 11002
Copyright
© EDP Sciences, 2010

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