615 Numerical Analysis of Flow in Gas Circuit Breaker Chamber with Ablation
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This paper describes a new method of numerical analysis in SF_6 gas circuit breaker. Ablation of the nozzle material and the electrode material has been studied in this method. This computational fluid dynamics calculation is based on a model for electrical arc, which takes into account Joule heating, radiation and real-gas effects. In this calculation, the fixed arc contact is treated as moving instead of the moving arc contact in real condition. The calculated pressures are compared with the measured pressures in the puffer chamber of gas circuit breaker. The coincidence of the calculated pressures and the measured pressures is good except for the end travel zone.
