4-24- A three-phase, 335-hp, 2000-V, six-pole, 60-Hz, Y-connected scuirrel-cage induction motor has the followingparameters per phase that are applicable at normal slips:ri = 0.2 Qŕ2 = 0.203 NXI == 0.707 Nre = 450 2Xạ = 77 2%3D%3DThe rotational losses are 4100 W . Using the approximateequivalent circuit, compute for the slip of 1.5%:a)line power factor and current.b)devloped current.c)efficincy.

As we have given: Q=335 hpV=2000 VP=6f=60 Hzr1=0.2 Ωr2'=0.203 Ωre=450 Ωx1=0.707 Ωx2=0.707 Ωxϕ=77…

4-24- A three-phase, 335-hp, 2000-V, six-pole, 60-Hz, Y- connected scuirrel-cage induction motor has the following parameters per phase that are applicable at normal slips: Ti = 0.2 2 ń = 0.203 N Xi = X'2 = 0.707 N re = 450 2 %3D Xp = 77 2 The rotational losses are 4100 W . Using the approximate equivalent circuit, compute for the slip of 1.5%: a)line power factor and current. b)devloped current. c)efficincy.

4-24- A three-phase, 335-hp, 2000-V, six-pole, 60-Hz, Y- connected scuirrel-cage induction motor has the following parameters per phase that are applicable at normal slips: Ti = 0.2 2 ń = 0.203 N Xi = X'2 = 0.707 N re = 450 2 %3D Xp = 77 2 The rotational losses are 4100 W . Using the approximate equivalent circuit, compute for the slip of 1.5%: a)line power factor and current. b)devloped current. c)efficincy.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter8: Basic Electric Motors

Section: Chapter Questions

Problem 28RQ: What are the advantages and disadvantages of using the following types of motors? shaded-pole...

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