Title :
3-D finite element analysis of repulsion forces on contact systems in low voltage circuit breakers
Author :
Ito, Shokichi ; Kawase, Yoshihiro ; Mori, Hiroyuki
Author_Institution :
Dpet. of Electron., Fukuoka Inst. of Technol., Japan
fDate :
5/1/1996 12:00:00 AM
Abstract :
Low voltage circuit breakers which interrupt fault currents rapidly are widely used in power distribution systems. It is necessary, for the optimum design of circuit breakers, to analyze electromagnetic forces on the contact systems equipped with arc rupturing parts. In this paper, the forces generated by currents and flux densities are obtained by using the 3-D finite element method taking into account current constriction and variations in arc diameter. It is shown that the 3-D analysis is capable of evaluating new designs of LV circuit breaker contact systems
Keywords :
circuit breakers; circuit-breaking arcs; distribution networks; electrical contacts; electromagnetic forces; finite element analysis; magnetic flux; power system protection; 3-D finite element analysis; arc diameter variations; arc rupturing parts; contact systems; current constriction; electromagnetic forces; fault current interruption; flux densities; low voltage circuit breakers; power distribution systems; repulsion forces; Circuit analysis; Circuit breakers; Conductivity; Conductors; Electromagnetic analysis; Electromagnetic forces; Equations; Fault currents; Finite element methods; Low voltage; Power distribution; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
