FIELD: electricity.
SUBSTANCE: installation includes a drain circuit of a series-connected fuse, a switch, a shunt with a measuring device and a power switch, a reference electrode, and a control unit, while it is equipped with two converters, a power storage unit, three switches, wherein the underground structure is connected to the drain circuit through the first switch, a converter and the second switch, the power storage unit is connected to the output of the first converter, the input of the second converter is connected via the third switch with the power storage unit, one output of the second converter is connected via the second switch to the drainage circuit, the inputs of the control unit are connected to the underground structure and the reference electrode, the signals from the control unit are fed to three switches, the second converter and the power switch.
EFFECT: providing the possibility of accumulating electrical energy to maintain the protective potential of the underground structure in the protection range, as well as the lack of the need to install an additional DC power source.
1 dwg
