No-load test
cosϕo=3∗208∗221200=0.151⟹ϕo=cos−10.151=81.290
Iw=Ioccosϕo=22∗0.151=3.33A
Iμ=Iocsinϕo=22∗sin81.29=21.746A
Rc=IwVoc(ph)=3∗3.33208=36.053Ω
Xm=IμVocph=3∗21.746208=5.22Ω
Locked rotor test
Zeq=IscVscph=3∗64.524.6=0.22Ω
Req=3∗64.522200=0.176Ω
Xeq=Zeq2−Req2=0.222−0.1762=0.131Ω
X1=X2′=20.131=0.0655Ω
Tsh=2πNs60∗Shaftpoweroutput=2π∗144060∗42.536∗1000=282.07Nm
d. Total power output = 42.536 kW
Total power input = 3vpmIscosϕs=3(230.94)(73.137)cos22.06W=46.961kW
Efficiency=46.96142.536∗100=90.577%
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