Q1) A single phase transformer in a lab is subjected to both open and short circuit tests. The transformer is rated at 10 KVA, 2200/220 V and 60 Hz. During the tests the following results were recorded, Test Voltage (V) Current (A) Power (W) Open circuit 220 2.4 96 Short circuit 150 4.5 210 a) How much core losses does this transformer have? b) Draw the approximate equivalent circuit. Location High voltage is open circuited Low voltage side is shorted c) Determine the parameters of the equivalent circuit Re, Xm, Req and Zeq. d) Calculate the efficiency of this transformer at full load at 0.9 power factor lagging.