Simulation-Based Comparative Assessment of Arc Interruption Performance

This study investigates the performance of Molded Case Circuit Breakers (MCCB) through computational simulations and experimental evaluations, focusing on the influence of grid configurations within the arc chamber. The simulations are based on fundamental equations governing fluid dynamics and electromagnetic fields, utilizing the Navier-Stokes equations for fluid flow modeling and Maxwell's equations for electromagnetic phenomena. The Lorentz force is incorporated to account for the interactions between charged particles and electric and magnetic fields during fault conditions. We assume Local Thermal Equilibrium (LTE) within the arc plasma to accurately represent thermal effects, including energy exchange and temperature distribution [1]. Experimental setups were designed to assess the MCCB under controlled conditions, systematically varying the number of grids to evaluate their impact on key performance metrics, such as voltage drop and arc length extension. Data collected from both simulations and experiments were analyzed to reveal the effects of grid configuration on cooling effectiveness and thermal response. The findings indicate significant differences in MCCB performance based on grid design, highlighting the importance of optimizing grid configurations for improved reliability and safety. This research contributes valuable insights into the intricate dynamics of arc plasma behavior and thermal management, ultimately guiding the design enhancements of MCCBs for various applications [2], [3].