eq eq m A 120kVA, 4800/480V Y-Y transformer has per phase R=392, X=49, R=X=200k refer to...

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eq eq m A 120kVA, 4800/480V Y-Y transformer has per phase R=392, X=49, R=X=200k refer to high voltage side: 1. Using per unit system, find the full-load voltage regulation when PF=0.85 Lagging. 2. Calculate the efficiency at the same load. 3. If a single phase of this transformer is connected as a step-up Autotransformer, find the maximum VA rating. 4. Draw the mechanical characteristics of Differentially Compound dc motor. 5. Draw how the following characteristics of separately excited dc motor becomes if the main flux Halved and V. remains constant (Draw on the same axis) eq eq m A 120kVA, 4800/480V Y-Y transformer has per phase R=392, X=49, R=X=200k refer to high voltage side: 1. Using per unit system, find the full-load voltage regulation when PF=0.85 Lagging. 2. Calculate the efficiency at the same load. 3. If a single phase of this transformer is connected as a step-up Autotransformer, find the maximum VA rating. 4. Draw the mechanical characteristics of Differentially Compound dc motor. 5. Draw how the following characteristics of separately excited dc motor becomes if the main flux Halved and V. remains constant (Draw on the same axis)