单芯电缆线路的接地方式，屏蔽一端直接接地，另一端通过护层保护接地。
One end of the shield is directly grounded and the other end is grounded by protective shield.
当线路长度大约在500~700m及以下时，屏蔽层可采用一端直接接地(电缆终端位置接地)，另一端通过护层保护器接地。
When the length of the line is about 500-700 m or less, the shielding layer can be grounded directly at one end (the cable terminal position) and grounded through the protective layer protector at the other end.
这种接地方式还须安装一条沿电缆线路平行敷设的回流线，回流线两端接地。
This kind of grounding method also needs to install a parallel laying of the return line along the cable line, and the two ends of the return line are grounded.
敷设回流线时应使它与中间一相电缆的距离为0.7s(s为相邻电缆间的距离)，并在线路一半处换位。
When laying the return line, the distance between the return line and the middle one-phase cable should be 0.7s (s is the distance between adjacent cables) and should be transposed at half of the line.