Journal ArticleDOI
A New Approach to Compute Uniform Field Breakdown of Gases
TLDR
In this paper, it has been shown that the ac or dc voltage breakdown can be described by the following equation: U=G x dO x t where 6 is the gas density, d the gap length and G, o, t are constants.Abstract:
This paper presents a direct method for computing the uniform field breakdown of gases. It has been found that the ac or dc voltage breakdown can be described by the following equation: U=G x dO x t Where 6 is the gas density, d the gap length and G, o, t are constants. The equation has been verified for many usual gases (air, N2, CO2, SF6...) andfor a wide range of pressures and voitageg. The data obtained show a good agreement with the results of many authors including I.E.C. Standard 52.read more
Citations
More filters
Journal ArticleDOI
Common parametrizations of electron transport, collision cross section, and dielectric strength data for binary gas mixtures
TL;DR: In this article, a new method of fitting experimental data on dielectric strength for binary electronegative gas mixtures is proposed based upon the principal assumption that the electron kinetic energy distributions in the gas are Maxwellian.
Journal ArticleDOI
Empirical analysis of high pressure SF 6 gas breakdown strength in a spark gap switch
TL;DR: In this article, the breakdown field strength of high pressure SF6 filled spark gap switch in a wide range of pd (pressure times distance) and field enhancement factor (FEF) was estimated.
Journal ArticleDOI
Acoustic Theory Applied to the Physics of Electrical Breakdown in Dielectrics
TL;DR: In this paper, the authors discuss the remarkable correlation between acoustic theory and the physics of electrical breakdown in dielectrics, including the relative electrical strength of gases and mixtures, streamer initiation in liquid hydrocarbons, and the incubation period before treeing or breakdown own occurs within solid dielectric.
Journal ArticleDOI
Dielectric Strength of N 2 -He Mixtures and Comparison with N 2 -SF 6 and CO 2 -SF 6 Mixtures
TL;DR: In this article, the N2-He gas mixture has been studied in order to validate and extend Olivier' s5 equation to gas mixtures, and normalized curves were drawn and have permitted us to check the independance of the relation betwen the breakdown voltage U and the gas ratio n 1/n from the test conditions for the N 2-He, SF6-N2 and SF6 CO2 gas mixture.
Journal Article
Breakdown characteristics of gases in non-uniform fields
TL;DR: In this paper, the breakdown strength of CO2, N2, SF6 and air in non-uniform field were experimentally studied and the experimental results have shown that the breakdown voltages of SF6 in the practical range of pressure (100-200 kPa) are always higher than those of other gases.
References
More filters
Journal ArticleDOI
Electrical breakdown for uniform fields in compressed gases
TL;DR: The breakdown and pre-breakdown characteristics of uniform fields in compressed gases are described in this article, and the failure of the Townsend and streamer mechanisms of low-pressure breakdown is discussed, and a summary is made of the many suggested breakdown mechanisms for compressed gases.
Journal ArticleDOI
Electrical Breakdown of Long Gaps in Sulfur Hexafluoride
T. Nitta,Y. Shibuya +1 more
TL;DR: In this article, the electrical discharge characteristics of SF6 are discussed theoretically in relation to the field dependence of the ionization coefficient a and the electron attachment coefficient, and a simple theoretical formulation of breakdown or corona inception voltages of gaps in SF6 is derived.
Journal ArticleDOI
Breakdown Studies in Compressed Gases
TL;DR: In this article, the superior dielectric strength of compressed gases, their low dielectrics loss, low-dielectric constant, low cost, and the fact that they are self-healing make them very promising insulating media.
Journal ArticleDOI
Gaseous insulation for high-voltage transformers
TL;DR: SULFUR HEXAFLUORIDE in high-voltage apparatus fulfills these requirements of a gaseous dielectric: 1. temperature of condensation should be equal to or lower than that at which the apparatus is operated; 2. gas itself and its products of decomposition should not be toxic or of readily controllable toxicity; 3. the gas should be chemically inert and thermally stable; 4. it should have a high heat transfer coefficient as mentioned in this paper.