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A 3-phase, 2200-V, delta-connected, 12-pole 60-Hz induction motor runs at no load with rated voltage and frequency impressed and draws a line current of 20 Amp. and an input power of 14 Kw. The stator is Y-connected, and its resistance per phase is 0.4 Ohm. The rotor resistance r2 ’ is 0.2 Ohm per phase. Also, x1+x2'=2.0 Ω per phase. The motor runs at a slip of 2% when it is delivering power to a load. For this condition, determine a) The developed torque. b) The input line current and power factor.

A 3-phase, 2200-V, delta-connected, 12-pole 60-Hz induction motor runs at no load with rated voltage and frequency impressed and draws a line current of 20 Amp. and an input power of 14 Kw. The stator is Y-connected, and its resistance per phase is 0.4 Ohm. The rotor resistance r2 ’ is 0.2 Ohm per phase. Also, x1+x2'=2.0 Ω per phase. The motor runs at a slip of 2% when it is delivering power to a load. For this condition, determine a) The developed torque. b) The input line current and power factor.

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 3-phase, 2200-V, delta-connected, 12-pole 60-Hz induction motor runs at no load with
rated voltage and frequency impressed and draws a line current of 20 Amp. and an input
power of 14 Kw. The stator is Y-connected, and its resistance per phase is 0.4 Ohm. The rotor
resistance r2
’ is 0.2 Ohm per phase. Also, x1+x2'=2.0 Ω per phase. The motor runs at a slip of
2% when it is delivering power to a load. For this condition, determine
a) The developed torque.
b) The input line current and power factor.

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