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To address the impact of DC electrode polarity (anode/cathode configuration) on circuit-breaking performance during arc interruption, This study characterizes electrode-level interruption phenomena through an instrumented miniature circuit breaker (MCB) test platform. A magnetohydrodynamic (MHD) model was developed and experimentally validated. Results demonstrate strong alignment between simulated anode/cathode behaviors and observed arc dynamics, successfully replicating experimental phenomena with ≥ 80% model accuracy. Based on these findings, an optimized arc-extinguishing solution was developed to resolve MCB's polarity-dependent performance issues. Validation tests confirmed the design efficacy. Furthermore, anode/cathode behavior patterns were analyzed to determine optimal connection strategies for multistage products, providing actionable engineering design guidance.

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Modeling and Computational Methods for Dynamic Arc Root Transfer at Electrods

  • 会议论文

  • 发表日期：

    2026年

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  • Yinfang Huang,
  • Houwen Yang,
  • Zuoyong Gong

摘要

To address the impact of DC electrode polarity (anode/cathode configuration) on circuit-breaking performance during arc interruption, This study characterizes electrode-level interruption phenomena through an instrumented miniature circuit breaker (MCB) test platform. A magnetohydrodynamic (MHD) model was developed and experimentally validated. Results demonstrate strong alignment between simulated anode/cathode behaviors and observed arc dynamics, successfully replicating experimental phenomena with ≥ 80% model accuracy. Based on these findings, an optimized arc-extinguishing solution was developed to resolve MCB's polarity-dependent performance issues. Validation tests confirmed the design efficacy. Furthermore, anode/cathode behavior patterns were analyzed to determine optimal connection strategies for multistage products, providing actionable engineering design guidance.