10kV电容器组专用断路器控制回路优化设计

针对10kV电容器组断路器进行分合闸控制操作时经常发生断路器控制回路合闸线圈烧毁的问题,提出了一种断路器双合闸线圈控制回路的优化设计方案。该方案在原有的断路器合闸控制回路中增加了备用合闸控制回路,当主合闸线圈烧毁时,备用合闸线圈充电,合上断路器;备用合闸控制回路中串联了信号继电器,当主合闸线圈烧毁后信号继电器可发出故障信号,同时可保证备用合闸线圈端电压与主合闸线圈端电压保持一致。实际应用表明,该优化设计方案从根本上解决了断路器合闸线圈烧毁后不能及时合闸的问题,保证了电容器组的正常投退。

Optimal Design of Control Loop of Special Breaker of 10 kV Capacitor Bank

In view of problem that closing coil in control loop of breaker often happens burnout when breaker of 10 kV capacitor bank makes breaking-closing control operation,the paper proposed an optimal design scheme of double control loops of closing coil of breaker.The scheme adds standby closing control loop in original closing control loop of breaker.When main closing coil is burnout,standby closing coil is charged to close breaker.The standby closing control loop series signal relay which can send out fault signal after main closing coil is burnout and can ensure terminal voltage of standby closing coil is uniform with one of main closing coil.The actual application shows that the optimal design scheme solves problem that closing coil of breaker cannot close timely after it is burnout and ensures normal on/off of capacitor bank.