二次滤波器组操作断路器的额定电压选取

Slection of Voltage Rating for Operating Circuit Breaker of Secondary Filter Bank

针对二次滤波器组在开断时断口恢复电压过高而易发生重击穿的问题，根据ＩＥＣ５６和ＧＢ７６７５关于断路器开断电容器的有关规定，提出了选用比系统电压等级更高的断路器作为其操作断路器，并提出了选用断路器额定电压等级的原则。

In view of the frequent occurrence of restrikng of contacts in the circuit breaker of the secondary filter bank due to excess of recovery voltage during breaking operation, the selection of a circuit breaker with higher voltage grade than that of the system for the filter bank is recommended according to the requirement for open/close of the capacitor bank of the circuit breaker in IEC 56 and GB 7675, and the selection principle of the rating voltage for the circuit breaker is also suggested.