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Decay Modes of Anode Surface Temperature After Current Zero in Vacuum Arcs-Part I: Experimental Study.
- Source :
-
IEEE Transactions on Plasma Science . Apr2014 Part 2, Vol. 42 Issue 5, p1464-1473. 10p. - Publication Year :
- 2014
-
Abstract
- Anode surface temperature has a significant impact on the interruption capacity of a vacuum circuit breaker. The objective of this paper is to experimentally understand the decay process of anode surface temperature after extinguishing a high-vacuum arc with a large contact gap. The anode surface temperature after current zero was measured by a two-color pyrometer and arc modes observation was recorded by a highspeed charge-coupled device. A pair of asymmetric butt type contacts (contact materials: CuCr25 and CuCr50) was subjected to an axial magnetic field in a demountable vacuum chamber. The experimental result shows that there are two modes in decay processes of anode surface temperature: Mode I and Mode II. Mode I describes the anode surface decay process after diffuse low-current extinction and Mode II corresponds to high current extinction. In addition, the decay time of anode surface temperature will last longer, if the proportion of chromium rises from 25% to 50% in anode material. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00933813
- Volume :
- 42
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Plasma Science
- Publication Type :
- Academic Journal
- Accession number :
- 95969803
- Full Text :
- https://doi.org/10.1109/TPS.2014.2316131