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.
出处
《陕西电力》
2011年第12期80-82,共3页
Shanxi Electric Power
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
12 kV outdoor post-mounted vacuum circuit breaker
motor spring operating mechanism
over-current relay
failing to close
tripping
