3 phase induction motor, rated 6.9 kw connected in star (Y)
type voltage 220 V, 60 Hz, 6-pole, impedance value per phase in
the stator circuit is as follows: $R_1 = 0.294 \Omega$, $jX_1 = 0.503 \Omega$
$R_2 = 0.144 \Omega$, $jX_2 = 0.209 \Omega$ and $jXm = 13.25 \Omega$
when providing Rotational losses with a constant value of 130 W
and including losses in the core, there is a slip value equal to 2%
at rated voltage and frequency Calculate the following values
A) Rotational speed, voltage and current in the stator circuit
B) Power Factor, $P_{in}$, $P_{conv}$ and $P_{out}$
C) Efficiency value at rated load
