Grounding wire in power system: it is an important thing to protect operators when voltage is unexpectedly displayed on equipment and lines that have been cut off.
It is generally used for outdoor line and substation construction. Possible situations during maintenance:
1. Return current in the line
2. Electrostatic induction generated by nearby electrified bodies
3. Line electrification caused by incorrect switching on of the staff. At this time, the grounding wire connects the live line with the earth, and the travel is a closed loop to ensure the personal safety of the operator. Therefore, the grounding wire is also a safe return line.