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Characteristics of vacuum arc seriously influence the interruption ability of vacuum switches. In many cases (especially in commercial electrode systems), vacuum arcs are not completely axial symmetrical configuration. So, three-dimensional simulation of vacuum arc is needed. On the other hand, when the interruption current is very high, the anode will be in active state and becomes another source...
Electrode material seriously influences the characteristics of vacuum arc and further affects the performance of switches. In this paper, thermal processes of six kinds of metal anodes (including pure metal and alloy anodes) are simulated and researched. Two kinds of temperature calculation methods are used. Simulation results show that W and Mo anodes have the higher temperature than Cu, Cr, CuCr25...
In this paper, a one-dimensional (1-D) particle in cell-Monte Carlo collisions (PIC-MCC) model is developed to study the process of post-arc sheath expansion. In this model, both electrons and ions are treated as particles with their thermal velocities obeying the Maxwell-Boltzmann velocity distribution. The model takes the collision effects of ion-neutral (charge exchange collision and momentum exchange...
Based on a steady 3D Magneto-Hydro-Dynamic (MHD) model, the high-current vacuum arc (HCVA) under combined effect of actual magnetic field (MF) and external transverse magnetic field (ETMF) is simulated. The actual MF is generated by cup-type AMF contact system. The ETMF may cause the deflection of arc column which is the main reason of the contact deflected erosion. According to some experimental...
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