Small-current grounding fault accurate searching system

The embodiment of the invention provides a small-current grounding fault accurate searching system, which at least comprises a small-current grounding line selection terminal, a data service center and a fault diagnosis end, and is characterized in that the small-current grounding line selection terminal is at least installed at the head end and/or the tail end of a monitored end; a data acquisition device is arranged on the small current grounding line selection terminal and is used for acquiring current data and power data on the monitoring end and a specific time value of the ending end; the data service center is wirelessly connected with the small current grounding line selection terminal and the fault diagnosis terminal. 本申请实施例提供了一种小电流接地故障精确查找系统，至少包括：小电流接地选线终端，数据服务中心，故障诊断端，所述小电流接地选线终端至少被安装于被监测端的首端和/或末端上；所述小电流接地选线终端上设置有数据采集装置，用于采集所述监测端上的电流数据、功率数据和收尾端的特定时间值；所述数据服务中心无线连接所述小电流接地选线终端与故障诊断端。