A 460V, 25 HP, 60Hz, four-pole, Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1=0.641 ohms R2=0.332 ohms X1=1.106 ohms X2=0.464 ohms Xm=26.3 ohms The total rotational losses are 1100W and are assumed to be constant. The core loss is lumped in with the rotational losses. Assume a rotor slip of 2.2 percent at the rated voltage and rated frequency Synchronous speed, Nsync=1800 RPM Synchronous speed, Nsync=3600 RPM motor speed, Nm-1760 RPM motor speed, Nm=3660 RPM Equivalent impedance seen by the source (per phase), Z=21.48<43.6° A Equivalent impedance seen by the source (per phase), Z=14.07<33.6° A Stator current, 11-44.67<-12.6° A Stator current, 11=18.88<-33.6° A PF= 0.833 lagging PF= 0.933 lagging Input power, Pin=12530W Input power, Pin-34530W Stator copper loss, Pscl=685W Air-gap Power, Pag-11845W Developed power, Pdev=11585W Output power, Pout=10485W Load torque-63.9 N.m Load torque=56.9 N.m efficiency=97.7% efficiency=83.7%