Open-circuit and short-circuit tests on a 40-KVA, 2400/240-V, 50 Hz transformer gave the following results: Open-circuit test (with measurements done on the LV side): 240 V,2.7 A,125 W Short-circuit test (with measurements done on the HV side): 48 V,16.6667 A,610 W Record these values as you might need them in your subsequent calculations. a) Determine the parameters of the approximate equivalent circuit of the transformer referred to the HV side from the given test results. 1. Enter Re (in kOhms): (correct to 4 decimal places) ii. Enter Xm (in kOhms): (correct to 4 decimal places) iii. Enter Re1 (in Ohms): (correct to 4 decimal places) iv. Enter Xe1 (in Ohms): (correct to 4 decimal places) Record these values as you might need them in your subsequent calculations. b) Using the approximate equivalent circuit of the transformer referred to the HV side, determine the voltage regulation VR of the transformer operating at full load with the rated output voltage, 0.85 power factor lagging. Enter VR (in \%): (correct to 4 decimal places) Please scroll to the bottom of page for END of question. c) Using the test results only (i.e., not using the approximate equivalent circuit of the transformed, determine the efficiency n of the transformer operating at 90% of full load with the rated output voltage, 0.85 power factor lagging. Enter n (in \%) (coriect to 4 decimal places) d) Using the test results only, determine the KVA load at maximum efficiency. Enter KVAmax (in KVA): (correct to 4 decimal places) e) Using the test results only, determine the maximum efficiency 7lrax of the transformer at 0.85 power factor lagging. Enter n-ax (in \%) (connect to 4 decimal places)