一起12kV户外柱上真空断路器事故分析  

An Accident Analysis on 12 kV Outdoor Post-mounted Vacuum Circuit Breakers

作　　者：李久红 王森 菅永锋 李良书 

机构地区：[1]陕西电力科学研究,陕西西安710014

出　　处：《陕西电力》2011年第12期80-82,共3页Shanxi Electric Power

摘　　要：12 kV户外柱上真空断路器作为分布式的保护设备,在农网和城网的户外10 kV配电系统得到了广泛应用。介绍某供电局发生的1起12 kV户外柱上真空断路器跳闸及拒合事故,进行了检查及分析,发现该断路器存在手动分闸拉杆卡滞及过流脱扣器整定值不合理等缺陷,提出了针对该型断路器的过流脱扣器整定值、现场使用、质量控制等方面的建议。12 kV outdoor post-mounted vacuum circuit breakers,as a distributed protection equipment, have been widely used in 10 kV outdoor power distribution systems for rural and urban power grid. This paper introduces an tripping operation and failing to close occurred in the 12 kV outdoor post-mounted vacuum circuit breaker in a Power Supply Bureau , analyzes the failure cause, based on which points out that the clamping stagnation occurs in manual break-brake operation and the setting value of over-current trip relay is unreasonable. Finally, the paper proposes several corresponding suggestions.

关 键 词：12kV户外柱上真空断路器 弹簧操动机构 过流脱扣器 拒合 跳闸 

分 类 号：TM561.2[电气工程—电器]