Measurement of Temperature at Anode Spot Affected by External Magnetic Field Just Before Re-strike in Magnetic Driven Arc

Magnetic driven arc is a technology used as a DC circuit breaker in the field of electric railroads. To elucidate the breakdown factor of magnetic driven arc, the research has been conducted the focusing on the high-temperature metal vapor that exists between the electrodes just before restrike. Few researchers have researched about the spectrum intensity that emits at the next restrike spot just before the restrike. Temperature at anode spot affected by external magnetic field just before re-strike in magnetic driven arc is measured by spectrometer. Specifically, Cu I emitted from anode spot is paid attention to, and multi-spot spectroscopic measurements were performed using a spectrometer and a high-speed video camera. The temperature was calculated using the Boltzmann plot method. This research elucidates temperature at anode spot affected by external magnetic field just before re-strike in magnetic driven arc.