Determine the base current and base impedance in a three-phase power system on the base of 50

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Determine the base current and base impedance in a three-phase power system on the base of 50 MVA3-ph and 11 kVLL, first using single-phase formulas and then using three-phase formulas, recognizing that both single-and three-phase formulas give the same base current and base impedance values per phase.

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