I have a question about the contribution of motor in short circuit current. For a simple circuit of a 1500kW 13.8kV generator, which feeds a 1000kVA 13.8kV/480V transformer, and the transformer feeds a 480V 250HP motor. We have to calculate the short circuit current at the primary terminals of the transformer. If the full load current of the motor is 270A and the impedance of the transformer is 5.75%, then which formulas should be used to calculate that how much short circuit current this motor will produce, and how much of this short circuit current (produced by motor) will pass through from the secondary to the primary of the transformer? Thanks for help!
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