220kV气体绝缘金属封闭组合电器断路器SF_(6)低气压闭锁回路改进方案  

Improvement scheme of SF_(6) low pressure locking circuit of 220kV GIS circuit breaker

作　　者：何振宇 袁明哲 卿俊杰 刘鑫 邹经鑫 HE Zhenyu;YUAN Mingzhe;QING Junjie;LIU Xin;ZOU Jingxin(State Grid Sichuan Electric Power Chengdu Power Supply Company,Chengdu 610065)

机构地区：[1]国网成都供电公司,成都610065

出　　处：《电气技术》2021年第4期98-101,共4页Electrical Engineering

摘　　要：当气体绝缘金属封闭组合电器(GIS)断路器中SF_(6)气体压力过低时应通过密度继电器及其触点闭锁断路器分合闸操作。本文针对目前闭锁方案中未考虑密度继电器触点不可靠的问题,提出一种新的SF_(6)气压低闭锁回路改进方案,能简单有效地解决原闭锁回路中的隐患,且具有现场施工简便、改造难度小的优点,对生产运维具有一定实用价值。When the SF_(6) gas pressure in GIS circuit breaker is too low,the switch on and off operation of the circuit breaker should be blocked by density relay and its contact.Aiming at the problem that the density relay contacts are not reliable in the current blocking scheme,a new improvement scheme of SF_(6) air pressure low blocking circuit is proposed,which can solve the hidden danger in the original locking circuit simply and effectively.The utility model has the advantages of simple on-site construction and small transformation difficulty,and has certain practical value for production,operation and maintenance.

关 键 词：GIS 断路器 SF_(6) 密度继电器 低气压闭锁 

分 类 号：TM561[电气工程—电器] TM595