FIELD: electricity.
SUBSTANCE: method consists in single phase earth fault current limitation by the variable active resistance with the nonlinear volt-ampere characteristic which has sufficient value for current limitation at the phase voltage of high voltage power transmission line and low value at the atmospheric overvoltage. The resistance is series connected to the grounding device circuit on each support.
EFFECT: improvement of reliability and safety of operation of overhead power transmission lines.
2 dwg
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