Answer to Question #25996 in Electric Circuits for Ken Cunningham

Question #25996
1.A utility 4.16 kV three-phase distribution feeder has a three-phase short circuit MVA of 36 MVA with an x/r ratio of 2:1, the single-phase line-to-ground fault current is 2750 A with an x/r ratio of 1:1. Determine the equivalent system impedance in ohms referred to the low side of 4.16 kV-480Y/277 V transformer 2.Determine the short circuit at the terminals of a 500kVa, 4160-480Y/277V, three phase transformer having an impedance of 5.75% and an x/r ratio of 4:1. Neglect system impedance
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