Impulse and DC breakdown tracks of air in point-plane gaps

Impulse and DC breakdown tracks of 4 and 30 cm point-plane air gaps were investigated. For smaller gap in both voltage types, the positive-voltage breakdown tracks were found to wander further away from the axis than for negative voltage. For 30 cm point-plane gap the results are inverted, the traje...

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Bibliographic Details
Published inProceedings of 1995 International Symposium on Electrical Insulating Materials pp. 113 - 116
Main Authors Chavarria, P.A.C., Araujo, W.F.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1995
Subjects
Air gaps
Breakdown voltage
Dielectric breakdown
Electric breakdown
Electrodes
Impulse testing
Laboratories
Scattering
Sea level
Trajectory
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Summary:Impulse and DC breakdown tracks of 4 and 30 cm point-plane air gaps were investigated. For smaller gap in both voltage types, the positive-voltage breakdown tracks were found to wander further away from the axis than for negative voltage. For 30 cm point-plane gap the results are inverted, the trajectories of the electrical discharges for negative polarities, as a general rule, may travel more outward from the axis than for positive polarities. This shows that the electrical breakdown trajectories depends on the various discharge modes, so that simple models like that proposed by Watson are unsuited for explaining breakdown tracks.
ISBN:4886860478
9784886860477
DOI:10.1109/ISEIM.1995.496521