Title :
Discharge characteristics in an asymmetrically-perturbed SF6 gap
Author :
Fréchette, M.F. ; Côté, M. ; Larocque, R.Y.
Author_Institution :
Cables et Isolants, Technol. et IREQ, Varennes, Que., Canada
Abstract :
Conditions for the generation of true corona in a plane/point/plane SF6 gap are discussed. For quasi-uniform field conditions, it is shown that corona currents can be sustained only in the low-pressure range. As the gas pressure was increased, these currents were totally quenched. In pressurized gas conditions, UV (ultraviolet)-assisted charge-integrated currents were recorded. It was hypothesized that their observed growth with applied voltage was too weak to bring about a self-sustained current over an extended voltage range beyond corona threshold
Keywords :
SF6 insulation; corona; radiation effects; SF6; UV-assisted charge integrated currents; applied voltage; asymmetrically-perturbed SF6 gap; corona; corona currents; corona threshold; low-pressure range; plane/point/plane SF6 gap; pressurized gas conditions; quasi-uniform field conditions; Breakdown voltage; Corona; Electrodes; Engineering management; Geometry; Quality management; Reproducibility of results; Shape; Sulfur hexafluoride; Threshold voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1993. Annual Report., Conference on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-0966-9
DOI :
10.1109/CEIDP.1993.378943
