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 language | English |
|---|---|
| Pages (from-to) | 23-30 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Feb 2002 |
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering