Characteristics Analysis of Arc Temperature in SF6 Circuit Breaker

A method to process the arc spectrum data in a real SF6 circuit breaker was described and the arc temperature characteristics were analyzed. The arc spectrum data was corrected based on the principle of line broaden to correct noise and spectral shifts. Considering the fact that there were few sampling points for actual measurement in a real SF6 circuit breaker, the algorithm based on cubic spline interpolation with an accuracy of 0.85% was applied. The radial distribution of arc temperature was calculated with an accuracy of 8.54 %. The arc temperature after current zero, the arc temperature at different currents, positions and measuring time points were compared. The arc characteristics is analyzed. Temperatures in the arc center were in the range of 15000K-25000K while the arc circuit varied from 6kA-30kA.