Title :
DC pre-breakdown phenomena and breakdown characteristics in the presence of metallic particle in liquid nitrogen
Author :
Hara, M. ; Suehiro, J. ; Maeda, H. ; Nakashima, H.
Author_Institution :
Dept. of Electr. & Electron. Syst. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
DC pre-breakdown phenomena and breakdown characteristics in the presence of free metallic particle in liquid nitrogen are studied experimentally. The results show that microdischarge occurs when a charged particle is approaching oppositely charged electrodes and intense microdischarge can trigger the complete breakdown of the tested gap. The breakdown voltage of uniform field gap with the free particle might severely fall below that of a point-to-plane gap without particle in liquid nitrogen
Keywords :
dielectric liquids; electric breakdown; insulating oils; nitrogen; DC pre-breakdown phenomena; N2; breakdown characteristics; breakdown voltage; charged particle; free metallic particle; free particle; intense microdischarge; liquid N2; metallic particle; microdischarge; point-to-plane gap; uniform field gap; Contamination; Current measurement; Electric breakdown; Electrical resistance measurement; Electrodes; Glass; Needles; Nitrogen; Pollution measurement; System testing;
Conference_Titel :
Dielectric Liquids, 1999. (ICDL '99) Proceedings of the 1999 IEEE 13th International Conference on
Conference_Location :
Nara
Print_ISBN :
0-7803-4759-5
DOI :
10.1109/ICDL.1999.798971
