Calculate the 3-∅ power developed in the IM connected in star using the following data: Vp=7 V, IL=7 A, cosΦ=.6.(a) 88.5 W(b) 88.4 W(c) 88.8 W(d) 88.2 WThe question was asked in quiz.My enquiry is from Power Rating Determination of Electric Motors for Different Applications in division Rating and Heating of Motors of Electric Drives

Calculate the 3-∅ power developed in the IM connected in star using

1.	Calculate the 3-∅ power developed in the IM connected in star using the following data: Vp=7 V, IL=7 A, cosΦ=.6.(a) 88.5 W(b) 88.4 W(c) 88.8 W(d) 88.2 WThe question was asked in quiz.My enquiry is from Power Rating Determination of Electric Motors for Different Applications in division Rating and Heating of Motors of Electric Drives
Answer» CORRECT choice is (d) 88.2 W Easy explanation: The power developed in the IM is √3VLILcos∅. The power is INDEPENDENT of time and frequency. In STAR connection VL=√3Vp=12.12 V. P=√3VLILcos∅=3×20×5×.8=88.2 W.

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