Journal ArticleDOI
Anomalous Breakdown in Uniform Field Gaps in SF6
TLDR
In this paper, a generalized quantitative criterion suitable for computer calculations of breakdown voltages in known fields in SF6 and other strongly electronegative gases is described, and it is shown that the anomaly in the uniform field gap breakdown voltage can be satisfactorily accounted for.Abstract:
Experiments showing anomalously low breakdown voltages in uniform field gaps in SF6 are discussed. A generalized quantitative criterion suitable for computer calculations of breakdown voltages in known fields in SF6 and other strongly electronegative gases is described, and it is shown that the anomaly in the uniform field gap breakdown voltages can be satisfactorily accounted for. Similar anomalies can occur in other field geometries and in other gases; it is shown how to avoid such breakdowns.read more
Citations
More filters
Journal ArticleDOI
On the electrical breakdown of gaseous dielectrics-an engineering approach
TL;DR: In this paper, the Townsend breakdown criterion is derived for nonuniform fields and a reformulation of the streamer criterion is undertaken, which leads to applicable criteria for the onset of breakdown in air as well as in strongly electronegative gases.
Journal ArticleDOI
Breakdown Mechanisms in Sulphur-Hexafluoride
Nazar H. Malik,A. H. Qureshi +1 more
TL;DR: In this article, the well known breakdown theories, Townsend's generation mechanism and the streamer mechanism, are reviewed and applied to the results of breakdown in the strongly electronegative gas, sulphur-hexafluoride.
Journal ArticleDOI
Electric fields and electrical insulation
TL;DR: In this article, the adoption of a field-theoretical approach to problems arising in the framework of electrical insulation is discussed with reference to six main topics, which have been addressed over the last 30 years.
Journal ArticleDOI
Anomalous Paschen effect
Predrag Osmokrovic,A. Vasic +1 more
TL;DR: The anomalous Paschen effect is the result of the breakdown in a nonhomogenous electric field (edge electrode lines) as mentioned in this paper, which occurs due to the breakdown of a non-homogeneous electric field.
Proceedings ArticleDOI
On the electrical breakdown of gaseous dielectrics-an engineering approach
TL;DR: In this paper, the authors derived quantitative criteria for the onset of breakdown in atmospheric air and similar weakly electronegative gases, such as SF/sub 6, using Paschen curve data.
References
More filters
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
Criteria for Spark Breakdown in Sulfur Hexafluoride
TL;DR: 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.
Journal ArticleDOI
Measurement of ionisation and attachment coefficients in SF6
H.A. Boyd,G.C. Crichton +1 more
TL;DR: In this article, measurements of pre-breakdown ionisation currents in SF6 at pressures of up to 400 torr have been carried out over a range of E/p (E being electric field strength, and p the gas pressure referred to 20°C) for 115 ⩽ E /p ⊽ 200 V/cm torr and values of the primary ionisation α, secondary ionisation γ and attachment η coefficients obtained within the acccuracy with which the values are known.
Journal ArticleDOI
Inherent Limitations in Uniform Field Discharge Data for SF6
P. W. Karlsson,A. Pedersen +1 more
TL;DR: In this paper, it was shown that uniform field discharge data for SF6 may be subject to errors caused by the effect of the inherent nonuniformity of the test gap.