220kV断路器压力闭锁回路分析应用

220 kV断路器要求有两组独立的操作回路,这就要求与之配合的断路器SF6压力闭锁、液压操作机构压力闭锁回路也应有两组独立的才行,但由于一些早期断路器只能提供一组相关压力闭锁接点,这就要求怎样将一组接点转换成两组接点供两组操作回路用而又能互相不受影响;对于新期投运的断路器,断路器自身就有两组闭锁回路分别供两组操作回路用,但如何正确接线,才能保证其真正的独立性。对此,文章根据目前的断路器现状进行了分析,提出了相关注意事项,防止了错误接线的产生。

Analysis on pressure blocking circiut in 220 kV switch

Two independent operating circuits are required in 220 kV switch. As a result, two independent operating circuits are required in pressure blocking circiut of SF6 and hydraulic pressure operation machine. Because there is only one pressure blocking point in the early switch, the point was transformed into two independent circuit. In order to ensure the independence of the new switch, the situation of switch is analyzed.