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A three phase squirrel cage induction motor has a starting current ofseven times the full-load current and full-load slip of 5%.881. If an auto-transformer is used for reduced voltage starting toprovide 1.5 per unit starting torque, the auto-transformer ratio(%) should be(a) 57.77% (b) 72.56% (c) 78.25% (d) 81.33%882. If a star-delta starter is used to start this induction motor, the perunit starting torque will be(a) 0.607 (b) 0.816 (c) 1.225 (d) 1.616883. If a starting torque of 0.5 per unit is required then theperstarting current should be(a) 4.65 (b) 3.75 (c) 3.16 (d) 2.13​

Answer» <html><body><p><strong>Answer:</strong></p><p>at.65.........+|*$*#8#<a class="__cf_email__" data-cfemail="d6ee96ee" href="/cdn-cgi/l/email-protection">[email protected]</a>@^^!<a href="https://interviewquestions.tuteehub.com/tag/5-319454" style="font-weight:bold;" target="_blank" title="Click to know more about 5">5</a>*@8$*$&amp;<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a>*jrkror</p></body></html>


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