When DC Circuit Breaker interrupts, the DC arc will appear on the contacts. Since DC arc has no natural zero-crossing point, it is more difficult to extinguish than AC arc. Therefore, it is necessary to study on the characteristics of DC arc. First, the Mayr arc model has been established in MATLAB/Simulink platform in this paper. Then the arc is simulated in the condition of resistive, inductive and capacitive currents. Next, the variation of arc waveform under different time constants and dissipative power is analyzed. Finally, the above research on arc characteristics can provide some references for the research of DC interruption arc in engineering.

Arc characteristics,arc parameters,arc modeling,DC arc,Mayr arc model