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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v9.i4.70
pages 573-582

HOT SF6 BREAKDOWN CALCULATIONS APPLIED TO HIGH VOLTAGE CIRCUIT BREAKER

Mohammed Yousfi
LAPLACE, Universite Paul Sabatier de Toulouse, Centre National de la Recherche Scientifique, Institut National Polytechnique de Toulouse, 118 Route de Narbonne, Toulouse, France
Ph. Robin-Jouan
Centre de Recherche de la Transmission d'Energie AREVA T&D, 130 rue Leon Blum 69611 Villeurbanne Cedex, France
Z. Kanzari
Universitó Paul Sabatier, CPAT-UMR 5002 CNRS, 118 Route De Narbonne, 31062 Toulouse Cedex 9, France

ABSTRACT

This paper is devoted to the breakdown electric field strength calculations of hot SF6 under the conditions of the usual dielectric recovery phase in a high voltage circuit breaker. This means that calculations are undertaken for a large temperature range (300 K up to 3000 K) and different gas pressures (1 up to 7 atmospheres). Calculations are based on a rigorous multi-term Boltzmann equation solution using improved cross section sets for the interactions between the electrons and the various SF6 dissociation products. The present breakdown electric fields show an interesting agreement with the sparse literature results. Then our results are used as input data in hydrodynamics simulation codes. This allows thus to correctly predicting the circuit breaker behaviours observed in the case of a successful breaking test and a failure one.


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