The total series resistance and leakage reactance of a single-phase 132-kV/11-kV transformer referred to the primary side are 0.8 Ω and 10 Ω, respectively. This transformer supplies a load of 50 MW at 0.8 pf lagging and 10 kV on its low voltage (secondary) side. Solve each of the parts below using per-unit quantities with a base power of 100 MVA.
a) Calculate the current and voltage on the high voltage side of this transformer (provide values in both per-unit form and in SI units).
b) Calculate the active power, reactive power, apparent power, and power factor on the primary side of this transformer (provide values in both per-unit form and in SI units). What is the efficiency of this transformer?