The vacuum circuit breaker is a kind of switch equipment which is used in the middle-voltage field in the power system, which undertakes double tasks of controlling and protecting.
真空断路器是电力系统中压领域的一种开关设备，它担负着控制和保护的双重任务。
2
In the paper, the mostly work is the study on Middle-voltage Circuit Breaker PMA, its principle, the static characteristic, the dynamic characteristic and the control system.
本文主要工作是对中压断路器永磁操动机构的原理、静态吸力、动态特性及控制系统进行了研究分析。
3
Through analyzing the reclosing of circuit breaker in middle of line-transformer strings, the existing problems were figured out and the modification measures were put forward.