Development of 126 kV Single-break Vacuum Circuit Breaker

摘要

,respectively. The maximum value of phase shift time of these three geometries region were 1.18, 1.57, and 0.48 ms, respectively. Two vacuum arcs columns with self-balance process was observed for horseshoe type electrode. 3/4 coil type electrode presented one arc column. Besides, vacuum interrupter with 3/4 coil type electrode met temperature-rise requirement at current of 2500 A according to simulation and experiment. Vacuum interrupter with slotted horseshoe type was suitable for normal current of 3150 A according to simulation. Finally, a 126 kV single-break vacuum circuit breaker with 3/4 coil type electrode was developed. It has passed type test according to standard ICE 62270-100.