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A 55 hp, 440 V, 400 rpm DC shunt motor draws 107 A when operating at rated conditions. The motor has an armature-circuit resistance of 100 mW and a total field-circuit resistance of 55 W. (vii) What is the motor no-load speed if the no load induced voltage is 440.85V? 390 rpm 395 rpm 400 rpm 405 rpm 410 rpm  (viii)    What would be the starting line current if the motor was started at full-voltage? 4107 A 4255 A 4392 A

A 55 hp, 440 V, 400 rpm DC shunt motor draws 107 A when operating at rated conditions. The motor has an armature-circuit resistance of 100 mW and a total field-circuit resistance of 55 W. (vii) What is the motor no-load speed if the no load induced voltage is 440.85V? 390 rpm 395 rpm 400 rpm 405 rpm 410 rpm  (viii)    What would be the starting line current if the motor was started at full-voltage? 4107 A 4255 A 4392 A

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A 55 hp, 440 V, 400 rpm DC shunt motor draws 107 A when operating at rated conditions. The motor has an armature-circuit resistance of 100 mW and a total field-circuit resistance of 55 W.

(vii) What is the motor no-load speed if the no load induced voltage is 440.85V?

  • 390 rpm
  • 395 rpm
  • 400 rpm
  • 405 rpm
  • 410 rpm

 (viii)    What would be the starting line current if the motor was started at full-voltage?

  • 4107 A
  • 4255 A
  • 4392 A
  • 4400 A
  • 4408 A

(ix)       What is the motor full-voltage starting line current if a 1.9Ω starting resistor is connected in series with the armature?

  • 212 A
  • 220 A
  • 228 A
  • 6 A
  • 6 A
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