Under an electrode line one understands the line connection from the static inverter plant of a high voltage direct current transmission from to the grounding electrode (cathode or anode). The grounding electrode is for the prevention of electro-chemical corrosion and for the avoidance of electromagnetic influence always some kilometers away from the static inverter station, so for this a separate line connection is necessary. This can be implemented depending upon situation of the electrode (ashore or in the sea) as ground cables as overhead line or as combination of ground cable and overhead line. The electrode line is mostly laid out for an operating voltage by approx. 10-20kV (medium voltage range).