Analysis and Research of the Electric Field in the Vacuum Arc Interrupter of a 31.5 kV Vacuum Circuit Breaker

作者：Naming Zhang, Siying Yang, Yuan Feng, Zechen Bai, Shuhong Wang, Shuya Ning · 发表于：Energies · 年份：2025 · DOI：10.3390/en18246462 · 被引用次数：1 · 研究领域：Vacuum and Plasma Arcs、Advanced Sensor Technologies Research、Electrical Contact Performance and Analysis

The insulation performance of vacuum arc interrupters greatly affects the reliability of vacuum circuit breakers. Optimizing the electric field distribution of a vacuum arc interrupter can improve its insulation performance. Here, we establish a two-dimensional model of vacuum arc interrupter with a shield system and study the electric field distribution of the vacuum arc interrupter under different structures through finite element simulation. Research has shown that as the electrode gap, contact chamfer radius, and main shield radius increase, the maximum value of the electric field in the vacuum arc interrupter decreases. The conductive rod at the static end of this vacuum arc interrupter is thickened, and the structure of the moving and static ends is asymmetric, resulting in asymmetric distribution of electric fields at the moving and static ends, which is not conducive to uniform electric fields. Optimization can be achieved by adjusting the structure of the main shielding cover. The research results will provide a basis for optimizing the electric field distribution of vacuum arc interrupters.