1. A 230/1000V 50 Hz, single phase transformer has the following test data:
Open circuit test (L.V.)
Primary voltage = 230V
Primary current = 1.30 A
Input power = 115W
Short circuit test (H.V.)
Primary voltage = 50 V
Secondary current = 5.55A
Input power = 165 W
a) Determine and sketch the equivalent circuit for the transformer
b) Determine the efficiency of the transformer at full load current at a power factor of unity and 0.8 lagging
Find the percentage regulation at a power factor of unity and 0.8 lagging