Self-Consistent Modeling of Electrode Motion in a Model Circuit Breaker


  • R. Fuchs HSR University of Applied Sciences Rapperswil



circuit breaker, electrical arc simulation, self-consistent, rigid body motion


Numerical simulations of low-voltage circuit breakers require a coupled solution of gas flow, electromagnetism, electrical circuit, and other aspects. Including electrode motion is challenging because the computational grid is deformed and data is to be exchanged among dedicated solvers. A central issue is to keep them synchronized. This is addressed with a single framework that allows for a continuously morphing grid and accounting for the cumulative effects of mechanics, Lorentz force, and gas pressure. It is shown that gas pressure has negligible effect.


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