小电流接地选线装置选线误判防范措施

分析了小电流接地系统中发生单相接地时的运行特点及工程应用中零序电流互感器、零序滤序器及装置误差因素所引起的选线误判，并提出在实际工程应用中选用配套合格的测量装置、二次接线及电缆接地线的安装等符合规范要求的方法，达到降低测量环节综合误差的目的，减少选线误判的发生。

Preventive Measures of Line Selection Device for Line Selecting Fault in Small Current Grounding Networks

The feature of single-phase grounding in Small Current Grounding Networks and the line selecting fault caused by the device error of zero-sequence current transformer and zero-sequence sequence filter in project is analyzed, and briefly it is introduced that in project the suitable measure device should be selected and the installation of the secondary loop and the ground wire of cable should accord with the criterion so as to reduce integrated errors of the course of measure and finally decrease the occurring of line selecting fault.