Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v14.i3.60
pages 271-284

CATHODE SPOT EMERGENCE ON COPPER AND CHROMIUM ALLOY USED IN VACUUM BREAKERS

L. Andre
Laboratoire Arc Electrique et Plasmas Thermiques - Clermont Université - CNRS, Université Blaise Pascal, Bât. Physique 5 - 24 Avenue des Landais - F63170 AUBIERE Cedex, France
A. M'hammed
Laboratoire Arc Electrique et Plasmas Thermiques - Clermont Université - CNRS, Université Blaise Pascal, Bât. Physique 5 - 24 Avenue des Landais - F63170 AUBIERE Cedex, France
C. Stephane
Laboratoire de Mathématiques pour l'Industrie et la Physique - CNRS - Université Paul Sabatier Toulouse 3 - 118 route de Narbonne - F31062 TOULOUSE Cedex, France

ABSTRACT

For copper and chromium, used in alloy component electrodes of vacuum circuit breakers, the cathode spots are initiated on micron meter spikes above the surface of the electrode, they are considered as cylinders with a height equivalent. After spraying of these peaks the cathode spot reaches the surface of the electrode on which it will expand according to a proposed model. The two studied materials have quite different thermophysical properties, but they lead to comparable results. In both cases the erosion of cylindrical spikes is due to the flow of energy provided by the cathode spot, the mechanism is different from those found for the molten bridge or for fuses where the Joule effect is the only factor to take into account.


Articles with similar content:

DETERMINATION OF OPTICAL, ELASTIC, AND ACOUSTICAL PROPERTIES OF POROUS SILICON AS A FUNCTION OF ANODIZATION CURRENT DENSITY
Special Topics & Reviews in Porous Media: An International Journal, Vol.5, 2014, issue 1
V. Lakshmipriya, J. Pandiarajan, S. Jothi, N. Jeyakumaran, N. Prithivikumaran, B. Natarajan
LARGE AMPLITUDE OSCILLATIONS IN ELECTRIC ARCS SUSTAINED ON HETEROGENEOUS ELECTRODES IN GASEOUS ATMOSPHERE
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.2, 1998, issue 1
J. L. Doremieux, R. Haug
Heat Transfer across a Confined Thin Film with Structural or Mass Disorder: a Molecular Dynamics Study
International Heat Transfer Conference 15, Vol.33, 2014, issue
Cheng Shao, Hua Bao
Experimental determination of the thermal contact resistance and the local heat partition coefficient at the interface of two solids in dry friction
International Heat Transfer Conference 12, Vol.45, 2002, issue
Jean-Gabriel Bauzin, Najib Laraqi
EXPERIMENTAL OBSERVATION OF THE INTERACTION BETWEEN A MICROSCOPIC CATHODE TIP AND ELECTRICAL ARC
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.12, 2008, issue 1-2
E. Bourillot, J. Rossignol, Ph. Teste, B. de Fonseca