DC pre-breakdown phenomena and breakdown characteristics in the presence of conducting particles in liquid nitrogen

M. Hara, J. Suehiro, H. Maeda, H. Nakashima

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19 Citations (Scopus)

Abstract

dc pre-breakdown phenomena and breakdown characteristics in the presence of free conducting particles in liquid nitrogen are studied experimentally. The results show that a microdischarge occurs when a charged particle is approaching an oppositely charged electrode. An intense microdischarge can trigger a complete breakdown of the gap. The breakdown voltage of a uniform field gap with a free metallic particle of mm size might be reduced well below that of a point-to-plane gap without a particle in liquid nitrogen. Heavy contamination by a metallic powder produces a large reduction in the breakdown voltage, with a horizontal spacer surface. However carbon powder is less hazardous compared to metallic powder.

Original languageEnglish
Pages (from-to)23-30
Number of pages8
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume9
Issue number1
DOIs
Publication statusPublished - Feb 1 2002

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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