ANALYSIS OF POSITIVE STATIC CORONA-STABILIZED BREAKDOWN VOLTAGE OF SF₆ - 1. RISING VOLTAGE - PRESSURE CHARACTERISTICS.

Compressed SF//6 is now commonly used in hv equipment; however, the theoretical analysis of how the positive static corona-stabilized breakdown voltage changes with pressure has not yet been determined. This paper is devoted to such analysis at pressure values below that corresponding to the maximum breakdown voltage. A simple criterion is developed for this purpose. This criterion showed good agreement with experiment, whatever the degree of uniformity of the applied field. Corona stabilization of the applied field is quantitatively analyzed and proved to be responsible for the anomalous increase of breakdown voltage over that for corona onset.