Electrical_Power_Drivers-_ET3026WB-Chapt14_example_questions

Electrical_Power_Drivers-_ET3026WB-Chapt14_example_questions...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Most questions are of increased difficulty 14.10 A standard squirrel cage induction motor rated at 50hp, 440V, 60Hz, 1150r/min is connected to a 208V, 3 phase line. By how much are the breakdown torque and locked rotor torque altered? a) 47%. b) 22%. c) 212%. d) 448%. 14.11 (1) A 3 phase squirrel cage induction motor having a rated voltage of 575V, is connected to a 520V line. What is the change in the locked rotor current? 14.11 (2) A 3 phase squirrel cage induction motor having a rated voltage of 575V, is connected to a 520V line. What is the change in the locked rotor torque? 14.14 (1) A 300hp, 2300V, 3 phase, 60Hz squirrel cage induction motor turns at a full load speed of 590r/min. What is the approximate value of the rotor I 2 R losses? a) 3.8kW. b) 223kW. c) 227kW.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
d) 300kW.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern