PROTECTIVE EARTHING Russian patent published in 2022 - IPC H01R4/66 

FIELD: energy saving.

SUBSTANCE: invention relates to the field of energy saving in the system of electrochemical protection against corrosion of underground structures, electrically connected to the protective earthing system, and can be used, for example, in the oil and gas industry. The protective earthing conductor consists of metal elements buried in the ground, coated with electronegative metals, and additionally contains at least one non-metallic insert connecting the metal elements and containing a voltage drop unit electrically connected to the metal elements. The voltage drop assembly consists of electrical elements that provide a voltage drop of any kind and polarity, such as one or more pairs of semiconductor diodes connected back-to-back, as well as an electric capacitor to reduce the AC resistance of the earth electrode.

EFFECT: elimination of the negative impact exerted by protective grounding elements on the parameters of electrochemical protection of cathodic protected underground structures and directly on equipment, reducing electricity consumption by cathodic protection stations, increasing the service life of anode ground electrode systems, providing the necessary reserve of cathodic protection converters for current and power.

2 cl, 1 dwg