A 3-phase slip ring motor gives a reading of 35 V across slip rings on open circuit when atstandstill with normal stator voltage applied. The rotor is star-connected and hasimpedance of (0.7+j5) 2 per phase. Find the rotor current and p.f. when the machine is (i)at standstill with slip rings joined to a star connected starter with a phase impedance of(4+j3) 2 and (ii) when running normally with a 5% slip.

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3-phase slip ring motor gives a reading of 35 V across slip rings on open circuit when at candstill with normal stator voltage applied. The rotor is star-connected and has mpedance of (0.7+j5) 2 per phase. Find the rotor current and p.f. when the machine is (i) standstill with slip rings joined to a star connected starter with a phase impedance of +j3) Q and (ii) when running normally with a 5% slip.

3-phase slip ring motor gives a reading of 35 V across slip rings on open circuit when at candstill with normal stator voltage applied. The rotor is star-connected and has mpedance of (0.7+j5) 2 per phase. Find the rotor current and p.f. when the machine is (i) standstill with slip rings joined to a star connected starter with a phase impedance of +j3) Q and (ii) when running normally with a 5% slip.

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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