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1. A 3-phase induction motor at standstill has a circuit. The rotor winding is star-connected resistance of 0-2 92 per phase. Find the rotor cu 2. A 3-phase induction motor with a star-connect rings at standstill on open-circuit. The resistan 2-32 per phase respectively. Calculate the rote external resistance of 2 2 per phase.

1. A 3-phase induction motor at standstill has a circuit. The rotor winding is star-connected resistance of 0-2 92 per phase. Find the rotor cu 2. A 3-phase induction motor with a star-connect rings at standstill on open-circuit. The resistan 2-32 per phase respectively. Calculate the rote external resistance of 2 2 per phase.

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
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1. A 3-phase induction motor at standstill has a rotor voltage of 120 V between the slip rings on open- circuit. The rotor winding is star-connected and has reactance of 12 per phase at standstill and a resistance of 0-2 2 per phase. Find the rotor current per phase and power factor at start. [13-6 A; 0-98 lag] the slip 2. A 3-phase induction motor with a star-connected rotor has an induced e.m.f. of 80 V between rings at standstill on open-circuit. The resistance and standstill reactance of the rotor are 0-35 2 and 114 A; 02:32 per phase respectively. Calculate the rotor current per phase and the power factor at start 0-71 lag] with an external resistance of 22 per phase.
Transcribed Image Text:1. A 3-phase induction motor at standstill has a rotor voltage of 120 V between the slip rings on open- circuit. The rotor winding is star-connected and has reactance of 12 per phase at standstill and a resistance of 0-2 2 per phase. Find the rotor current per phase and power factor at start. [13-6 A; 0-98 lag] the slip 2. A 3-phase induction motor with a star-connected rotor has an induced e.m.f. of 80 V between rings at standstill on open-circuit. The resistance and standstill reactance of the rotor are 0-35 2 and 114 A; 02:32 per phase respectively. Calculate the rotor current per phase and the power factor at start 0-71 lag] with an external resistance of 22 per phase.
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