Simulation and experimental analysis of 100 kA pyro-breaker

The current contact in the pyro-breaker plays a critical role in enabling rapid circuit interruption and establishing short-term insulation, with its performance directly impacting the safety and reliability of the quench protection system. In this study, a comprehensive research approach combining multi-physics dynamic simulation and experimental validation is proposed to systematically model the dynamic propagation of explosion-induced shock waves and to conduct an in-depth analysis of the pressure distribution on the current contact under impact loading, as well as the breaking time characteristics under different breaks. To validate the accuracy of the numerical model, the first-ever international 100 kA-class load-breaking experiment of a pyro-breaker was designed and conducted. The experimental results show a high degree of consistency with the numerical simulations, thereby confirming the effectiveness and reliability of the proposed high-temperature circuit breaker design methodology. This study provides significant experimental evidence and theoretical insights to support further research and engineering applications in related fields.