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在检修地网时,将1千赫音频信号加在地网中心,临时接地线接在距地网中心3至5米处,如图1所示。在地面上用探测器沿地网线探查,地网线正常时,可由探测器听到1千赫信号,若有断线,在距断头2米左右,信号消失或减弱。用这种方法检查地网,可以准确找到断头位置,并且显著提高工作效率。
In the maintenance of the network, the 1 kHz audio signal is added to the center of the network, the temporary ground line connected to the center of the network 3 to 5 meters, as shown in Figure 1. On the ground with the detector along the ground line to explore, to the normal network cable, the detector can hear a 1 kHz signal, if broken, 2 meters away from the broken head, the signal disappears or weakened. Using this method to check the ground network, you can accurately find the decapitation position, and significantly improve work efficiency.