Journal ArticleDOI
Criteria for Spark Breakdown in Sulfur Hexafluoride
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In this paper, the mechanisms of spark breakdown in SF6 and other electronegative gases are discussed, and quantitative criteria are derived for the Townsend type and the streamer type of breakdown in nonuniform fields.Abstract:
Possible mechanisms of spark breakdown in SF6 and other electronegative gases are discussed, and quantitative criteria are derived for the Townsend type and the streamer type of breakdown in nonuniform fields. The Townsend criterion is of considerable physical interest but difficult to apply to engineering problems, whereas the semi-empirical streamer criterion, which holds for impulse breakdown, can be applied to any gap geometry of known field distribution.read more
Citations
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Journal ArticleDOI
Analysis of Paschen Curves for air, N2 and SF6 Using the Townsend Breakdown Equation
E. Husain,R. S. Nema +1 more
TL;DR: In this article, it has been shown that it is possible to extend the validity of the Townsend breakdown criterion for evaluating the breakdown voltages in the complete pd range in which Paschen curves are available.
Journal ArticleDOI
A method for prediction of gaseous discharge threshold voltage in the presence of a conducting particle
Masanori Hara,Masanori Akazaki +1 more
TL;DR: In this article, the breakdown mechanisms in a non-uniform field gap with a free conducting sphere can be classified into four kinds with regard to the particle movement and the occurring position of breakdown.
Journal ArticleDOI
Mechanism of electrical breakdown of gases for pressures from 10−9 to 1 bar and inter-electrode gaps from 0.1 to 0.5 mm
TL;DR: In this article, the mechanisms of gas breakdown at low values of pressure and inter-electrode gap, i.e. in the vicinity of the Paschen minimum, were discussed.
Journal ArticleDOI
Corona and Insulation
M. Goldman,R. S. Sigmond +1 more
TL;DR: In this article, a review of the present knowledge of the physics of electrical coronas and their interaction with surfaces is presented, with some emphasis on phenomena which seem of importance for high voltage insulation.
Journal ArticleDOI
Factors Controlling Surface Flashover in SF6 Gas Insulated Systems
TL;DR: In this article, various factors controlling flashover of solid insulators in pressurized SF6, are reviewed and their influences in gas insulated systems are discussed from a practical point of view.
References
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Book
Electrical breakdown of gases
John M. Meek,J. D. Craggs +1 more
TL;DR: In this paper, a collection of individual works on electrical discharges is presented, including fundamental processes in the electrical breakdown of gases, vacuum breakdown, spark breakdown in uniform fields, corona discharge, and burst in non-uniform fields.
Journal ArticleDOI
Measurement of Ionization and Attachment Coefficients in Sulphur Hexafluoride in Uniform Fields
M S Bhalla,J D Craggs +1 more
TL;DR: In this paper, the growth of pre-breakdown currents in uniform field conditions in sulphur hexafluoride at different pressures for values of E/p in the range of 90 to 160 v cm-1 mmHg-1 (5-200 mm Hg pressure) indicates very large electron attachment.
Journal ArticleDOI
A Condition on Uniform Field Breakdown in Electron-Attaching Gases
Ronald Geballe,Marvin L. Reeves +1 more
TL;DR: In this paper, a study of the steady-state current in electron-attaching gases suggests that this equation is nearly that for which the ionization and attachment coefficients are equal.