ZRCT-NSL-14 小电流接地选线
ZRCT-NSL-14 Line Selection for Low Current Grounding
功能：当小电流接地系统发生单相接地故障时，本装置具有自动报警并准确寻找故障线路的功能。
Functions: When the single-phase grounding fault occurs in the small current grounding system, the device has the function of automatic alarm and accurate fault line finding.
适用范围：适用于35kV及以下电压等级的中性点不接地(经消弧线圈接地、经电阻接地)的电力系统。
Scope of application: It is suitable for power system with 35 kV and below voltage grade neutral point not grounded (grounded by arc suppression coil, grounded by resistance).
工作原理：装置上电后，监视系统的 PT开口三角电压。发生接地故障时，接地线路的母线 PT开口三角电压3U0超过设定的启动值，装置立即转入采样零序电流3I0并迅速进行信号分析及处理，输出选线结果，同时装置仍保持循环监视状态。
Working principle: After the device is powered on, the PT open delta voltage of the monitoring system is monitored. When a ground fault occurs,the PT open delta voltage 3U0 of the grounding line exceeds the set starting value. The device immediately transfers to the sampled zero sequence current 3I0 and carries out signal analysis and processing rapidly. The result of line selection is output, while the device remains in the state of cyclic monitoring.
外形和开孔尺寸Shape and hole size
外形尺寸:162mm(w)x184mm(h)x150mm(d)
开孔尺寸:160mm(w)x151mm(h)
Dimension: 162mm (w) x184mm (h) x150mm (d)
Hole size: 160mm (w) x 151mm (h)
