KS C IEC 60909-3-2020 Short-circuit currents in three-phase AC systems —Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth
2020KS C IEC 60909-3-2020 Short-circuit currents in three-phase AC systems —Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth