12kV开关柜用接地开关动热稳定性分析与改进  

Analysis and Improvement of Dynamic and Thermal Stability of Earthing Switch for 12 kV Switchgear

作　　者：李军浩 高钰 张继平 马琰 LI Jun-hao;GAO Yu;ZHANG Ji-ping;MA Yan(Pinggao Group Co.,Ltd,Pingdingshan 467000,China;Henan Jiuyu-Pinggao Technology Development Co.,Ltd,Zhengzhou 450007,China)

机构地区：[1]平高集团有限公司,河南平顶山467000 [2]河南九域平高科技发展有限公司,河南郑州450007

出　　处：《电工电气》2021年第12期53-56,共4页Electrotechnics Electric

摘　　要：12kV开关柜用接地开关动热稳定性,是接地开关最重要的性能之一。从导体及汇流铜管的截面积、动静触头接触面积及压紧力、分合闸弹簧规格、接地回路电流方向等方面分析了影响动热稳定性的主要因素,提出12kV开关柜用接地开关改进方案,装配制造1台样机按照动热稳定试验标准进行验证,试验后接地开关无明显损坏、变形、熔焊等现象,能够正常操作。The dynamic and thermal stability of earthing switch for 12kV switchgear is related to the personal safety of power equipment and operation inspection personnel.It is a crucial function of the earthing switch.The influential factors to its dynamic and thermal stability are the cross-sectional area of conductor and collector copper pipe,the contact area and pressing force of dynamic and static contacts,the specification of opening and closing spring,the current direction of earthing circuit,etc.This paper proposed a improvement scheme of earthing switch for 12 kV switchgear.A sample machine to be verified by the standards of the dynamic and thermal stability of conventional earthing switches experiment.The result shows that it operates well and does not have problems,such as breakdown,deformation,and fusion welding.

关 键 词：12kV开关柜 接地开关 动热稳定性 峰值耐受电流 短时耐受电流 

分 类 号：TM564[电气工程—电器] TM591