Title :
The inception and structure of prebreakdown streamers in perfluorinated polyethers
Author :
Fenimore, C. ; Stricklett, K.L. ; Yamashita, H. ; Kawai, H. ; Forster, E.O. ; Pompili, M.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
Electrical measurements of perfluorinated polyethers were performed to determine the suitability of this class of material as a liquid dielectric. Measures of the breakdown strength and streamer inception voltage are obtained under electrical impulse stress. The breakdown strength is nearly independent of polarity. Under high magnification photography the cathode-originated streamers are seen to have a subsonic mode of growth. The transition to fast growth occurs on time and spatial scales shorter than those found in liquid hydrocarbons. The gas-phase electrical properties and the high heat of vaporization of this material are considered as mechanisms for this behavior
Keywords :
dielectric materials; electric breakdown of liquids; electric strength; organic insulating materials; polymers; breakdown strength; cathode-originated streamers; electrical impulse stress; electrical measurements; gas-phase electrical properties; heat of vaporization; liquid dielectric; perfluorinated polyethers; prebreakdown streamers; streamer inception voltage; Breakdown voltage; Dielectric liquids; Dielectric materials; Dielectric measurements; Electric breakdown; Electric variables measurement; Hydrocarbons; Performance evaluation; Photography; Stress measurement;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on
Conference_Location :
Grenoble
DOI :
10.1109/ICDL.1990.202938
