高压断路器压力低闭锁回路存在问题的分析与改进  

Analysis and Improvement for Low Pressure Block Loop Problems of High Voltage Circuit Breaker

作　　者：陈晓彬[1] 黄祖伟[1] 屠黎明[2] 

机构地区：[1]广东电网公司揭阳供电局,广东省揭阳市522000 [2]北京四方继保自动化股份有限公司,北京市100085

出　　处：《电力系统自动化》2012年第24期89-92,共4页Automation of Electric Power Systems

摘　　要：针对目前SF6断路器的气体压力低闭锁回路由于使用了中间继电器,有可能因中间继电器故障而无法闭锁分合闸回路或不能及时发闭锁信号的问题,文中通过分析几种典型的断路器设备厂家在压力低闭锁回路设计方案上存在的利弊,提出了将中间继电器闭锁回路的单动断触点改为双动断触点串联,以及将发信回路的单动合触点改为双动合触点并联等改进方法,简单、有效地解决了压力低闭锁及发信回路存在的可靠性低问题。Due to use of the intermediate relay in existing SF6 circuit breakers＇ gas low pressure block loop, there may not block the closes opening and closing loop caused by fault of intermediate relay or can not send out block signal immediately. In view of this problem, by comparing several typical circuit breaker manufacturers＇ design advantages and disadvantages in the low pressure block loop, some improved methods are introduced, such as changing the block loop＇s single normally-closed contact of intermediate relays to two normally-closed contacts, changing the block signal＇ s single normally-open contact to parallel two normally-open contacts, etc. The low pressure block and low reliability of signal-sending loop have been simply and effectively solved.

关 键 词：压力低闭锁回路 高压断路器 分合闸闭锁 可靠性 

分 类 号：TM561[电气工程—电器]