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Per-Unit equivalent impedance of 5000-kVA autotransformer (connecting 110-kV system with 138-kV system) is 0.00091 + j0.00727...

Per-Unit equivalent impedance of 5000-kVA autotransformer (connecting 110-kV system with 138-kV system) is 0.00091 + j0.00727 pu. What will be the value of Per-Unit equivalent impedance if the windings are connected in a conventional manner (separate windings)? *

problem is related to Transformers

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