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

fYear

1990

fDate

10-14 Sep 1990

Firstpage

430

Lastpage

435

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on

Conference_Location

Grenoble

Type

conf

DOI

10.1109/ICDL.1990.202938

Filename

202938