Investigation on three-dimensional magnetic field between axial magnetic contacts for revolving arc type vacuum circuit breaker

In the short current breaking process, the magnetic field distribution between the axial magnetic contacts of vacuum circuit breaker directly influence the arc form, arc variation, are blow velocity and so on. Thus, it plays an important part in dielectric recovery characteristic during the breaking process. In this paper, taking the actual current flow path in the contacts into consideration, the three-dimensional (3D) magnetic field distribution between the axial magnetic contacts of the revolving arc type vacuum circuit breaker has been calculated. The magnetic induction strength distributions on the different space profile including the contacts surface have been obtained and their graphics processing are figured out. The simulation results show that this axial magnetic field distribution is beneficial to the vacuum arc quenching.