Interruption phenomenon of various electrode materials in vacuum

It is important to comprehend the interruption phenomenon of contact materials for aiming at adaptation to high voltage of vacuum circuit breakers. Then, we carried out measurement of arc energy and anode surface temperature and observation of vacuum arc by using the vacuum chamber. Moreover, we made prototype of new contact materials that was based on these tests result. And these contact materials were made for adaptation to high voltage of vacuum circuit breakers. Additionally, we carried out above tests and interruption test about these contact materials.