engineering recuitment GATE EE 2023-24 Test Series Electrical Machines Transformer Three Phase Transformer Basics
A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC = 110 PU and XM = 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.
Enter numerical value using the virtual keypad. Round off where necessary.