Title :
DC prebreakdown light in silicone-oil/polymer-film composite with sphere-sphere electrodes
Author :
Kadowaki, K. ; Kuwabara, K. ; Nishimoto, S. ; Kitani, I.
Author_Institution :
Dept. of Electr. & Electron. Eng., Ehime Univ., Matsuyama, Japan
Abstract :
This paper describes an experimental study on dc prebreakdown light in a silicone-oil/polymer-film composite with sphere-sphere electrodes using an optical system consisted of a 20 m-long image guide scope and a gated image intensifier. When the film was located on the positive-sphere, a film breakdown was caused by deposited charges on the film and then it induced a complete breakdown. When the film was located on the negative-sphere, a discharge channel in the oil often appeared at the initial stage and it extended over the gap within several nanoseconds. The breakdown processes for both the polarities are discussed on the basis of the photographs
Keywords :
composite insulating materials; electric breakdown; electrodes; insulating oils; insulation testing; polymer films; silicone insulation; 20 m; DC prebreakdown light; breakdown processes; gated image intensifier; image guide scope; insulation breakdown testing; oil discharge channel; optical system; silicone-oil/polymer-film composite; sphere-sphere electrodes; Breakdown voltage; Electric breakdown; Electrodes; Image intensifiers; Low voltage; Optical films; Optical polymers; Petroleum; Polymer films; Testing;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973818
