An ideal single-phase 1 kVA, 480/220 V step-down transformer have the open- and short-test circuit tests performed, and the result is the following: Open-circuit test (OCT) [Secondary side] Voc = 220 V Loc=0.5 A Pa = 35 W Short-circuit test (SCT) [Secondary side] V = 18 V 1 =4.5 A P = 65 W Find the equivalent circuit with all the parameters referred to the primary. (Note: R=0.87 (2) A 100 kVA, 440/2200 V Single-phase transformer has the following parameters R = 0.0122, R = 0.2792 X = 0.0592, X = 192 R47692, Xm1 =1542 The shunt-branch parameters are given with reference to the primary side. The transformer is supplying a load of 95 KVA at 2200V and 0.8 pf lagging. Com- pute the primary side voltage and current for the equivalent circuits of the following figure. Also, compute the voltage regulation in each case.