A 2.4 kVA, 2400/240-V, 50Hz, step down transformer has the following parameters:
R1=1.5 ohms
R2= .02 ohms
X1= 2.5 ohms
X2=.03 ohms
Rc1=6000 ohms
Xm1=8000ohms
It is operating at 50% of its rated load at a power factor of .5 leading, compute efficiency using both exact and approximate equivalent circuits as referred to the primary side. Tabulate the percent errors in the currents, voltages, powers, and efficiency caused by approximation