Physical and theoretical aspects of a new vacuum arc control technology-self arc diffusion by electrode: SADE

Our new vacuum arc control technology: SADE doubles the high current interruption capability of our conventional AMF technology. First, we describe the vacuum arc motion behavior recorded by a high speed CCD video camera. This arc behavior is closely related to axial magnetic field intensity. In particular, it depends on the profile of the externally generated axial magnetic field. The anode spot is likely to move to the highest magnetic field intensity. Second, we describe analytical results for concentration of vacuum arc at the anode side contact surface. This analysis implies the possibility of an ideal vacuum arc control magnetic field profile and intensity. Finally, we describe experimental results for vacuum arc control compared with the above physical and theoretical results, and we show a practical electrode configuration for vacuum interrupters and its application in a high current interruption experiment