Worked example
A 2 kVA, 50 Hz, power transformer has the equivalent-circuit parameter values referred to the primary:
$R_e = 0.682 \Omega$, $x_e = 0.173 \Omega$, $R_c = 1080 \Omega$,
$X_m = 657 \Omega$, $N_2 / N_1 = 0.472$.
If the primary is connected to 230 V 50 Hz supply,
and a load impedance $(6.0 + j2.5) \Omega$ is connected to the secondary,
determine:
(a) the secondary current magnitude,
(b) the secondary terminal voltage magnitude,
(c) the primary current magnitude,
(d) the efficiency of the transformer.
