Thermal characteristics of high-current vacuum arcs of the axial magnetic field contacts

Hwang, J.–H.; Lee, J.-C.; Choi, M.–J.; Kwon, J.–R.; Kim, Y.–J.

dc.contributor.author	Hwang, J.–H.
dc.contributor.author	Lee, J.-C.
dc.contributor.author	Choi, M.–J.
dc.contributor.author	Kwon, J.–R.
dc.contributor.author	Kim, Y.–J.
dc.date.accessioned	2014-11-21T06:06:38Z
dc.date.available	2014-11-21T06:06:38Z
dc.date.issued	2007
dc.description.abstract	Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007.	en_US
dc.description.abstract	The capabilities and advantages of vacuum interrupters (VIs) have been widely recognized on switching and controlling the fault currents in medium voltage level. Due to its environmental friendliness, there were various research and developments for using VIs in transmission and distribution lines. An axial magnetic field (AMF) electrode has more advantages of the switching capability than other contact designs such as reducing the arc voltage, securing higher current value for transferring from the constriction arc to the diffused arc and regulating the arc current distribution. The arc constriction should increase the heat flux and the local temperature on the electrodes and result in the surface melting, which has undesirable influences on the characteristics of vacuum arc and surroundings. In the present study, we considered two different types of AMF electrodes used widely in industries, one is coil type and the other is cup type, to investigate the effective arc area and the thermal characteristics by high-current vacuum arcs through three-dimensional FEM analysis. Calculated results were compared with the results by a commercial package, MAXWELL 3D, which is a reliable analysis tool for the electro-magnetic fields, to validate the present calculation.	en_US
dc.description.librarian	cs2014	en_US
dc.format.extent	5 pages	en_US
dc.format.medium	PDF	en_US
dc.identifier.citation	Hwang, J-H, Lee, J-C, Choi, M–J, Kwon, J–R & Kim, Y–J 2007, Thermal characteristics of high-current vacuum arcs of the axial magnetic field contacts, Paper presented to the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July 2007.	en_US
dc.identifier.isbn	9781868546435
dc.identifier.uri	http://hdl.handle.net/2263/42687
dc.language.iso	en	en_US
dc.publisher	International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics	en_US
dc.relation.ispartof	HEFAT 2007
dc.rights	University of Pretoria	en_US
dc.rights.uri	University of Pretoria	en_US
dc.subject	Vacuum interrupters	en_US
dc.subject	Transmission and distribution lines	en_US
dc.subject	Axial magnetic field	en_US
dc.subject	Regulating the arc current distribution	en_US
dc.subject	Surface melting	en_US
dc.subject	Vacuum arc	en_US
dc.subject	Electro-magnetic fields	en_US
dc.title	Thermal characteristics of high-current vacuum arcs of the axial magnetic field contacts	en_US
dc.type	Presentation	en_US