文档介绍：电力设备接地引下线导通测试方法的探讨
曹小龙
(甘肃省天水供电公司, 甘肃天水741020)
摘要:测量接地引下线与接地网及相邻设备间的导通电阻,不仅可以发现设备接地引下线电气接触不良也可发现接地网的局部缺陷,类工频法是目前测试导通电阻主要方法,其他方法可作为参考。导通电阻测试需注意参考点(基准点)选择、接触电阻及现场干扰的影响。要解决这些问题,应根据现场条件,在实践中积累经验,逐步完善。
关键词: 接地引下线;导通电阻;测试;类工频法
Power equipment ground connection causes time line to lead investigation and discussion knowing the testing method
Cao Xiao-long
(Power Supply Co. of Tian shui city,Gansu Province. Tianshui city Gansu province,741020)
Abstract: Measure ground connection attracting time line and the ground and border equipment room on-resistance, not only being able to discover equipment ground connection causing time line electricity bad contact to may discover the ground part defect also, being similar to labor frequency law is to test main method of on-resistance at present , method may be a reference other. On-resistance tests the effect needing paying attention to reference point (datum mark) choice , contact resistance , affects as well as the scene disturbs. Need to resolve these problems , respond to according to scene condition, accumulate experience , improve and perfect step by step in practice .
Key words:Ground connection attracts time line; On-resistance; Test; Be similar to labor frequency law;
0 引言
接地引下线是电力设备应接地的部位与地下接地极之间的金属导体,起着电气设备所需接地部分与接地网联通的作用。它的连接可靠与否是短路电流和雷击电流能否顺利地通过引下线泄进大地的重要保证,并且引下线的质量直接关系着电气设备是否失地运行和人身安全。
在电力设备的长时间运行过程中,接地引下线连接处有可能因受潮等因