DocumentCode :
21360
Title :
A Novel Vacuum Interrupter Contact Design for Improved High Current Interruption Performance Based on a Double-TMF Arc Control System
Author :
Lamara, Tarek ; Hencken, Kai ; Gentsch, Dietmar
Author_Institution :
Secheron SA, Satigny, Switzerland
Volume :
43
Issue :
5
fYear :
2015
fDate :
May-15
Firstpage :
1798
Lastpage :
1805
Abstract :
A new two-contact system with double-transversal magnetic field (TMF) structure is investigated regarding its potential for high current interruption. It consists of two concentric TMF contacts, in which the inner contact has a disk-shaped structure (spiral contact) and the outer contact a cup-shaped structure. This contact assembly gives several advantages over the use of single-TMF contacts, as the constricted high-current arc might either split between both inner and outer contacts or commute from the inner to the outer contact and continue its rotation. In both scenarios, we expect a better distribution of the arc energy over a larger contact surface. B-field simulation and Lorentz force calculation are carried out to investigate whether two constricted arcs, with one burning on the inner contact and the other on the outer contact, can coexist given their mutual attraction. Single-phase high current interruption tests were carried out to compare the performance of this new double-TMF contact system with that of a standard spiral-type single-TMF one. These tests have revealed superior performance of the new double-TMF contact system, which could interrupt current amplitude at least 20% higher than the one interrupted by the single-TMF contact system.
Keywords :
magnetic fields; vacuum arcs; vacuum interrupters; B-field simulation; Lorentz force calculation; arc energy distribution; double-TMF arc control system; double-TMF contact system; double-transversal magnetic field structure; high current interruption performance; vacuum interrupter contact design; Force; Geometry; Interrupters; Mathematical model; Spirals; Standards; Vacuum arcs; Transverse magnetic field; vacuum arc; vacuum circuit breaker; vacuum interrupter (VI); vacuum interrupter (VI).;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2015.2416517
Filename :
7084126
Link To Document :
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