Question 5 A 200 HP, 440 V, 1440 rpm, 50 Hz induction motor has a power factor of 0.85 lagging and an efficiency of 90% at full load. If started with rated voltage (DOL), the starting current is 6 times greater than the rated current of the motor. a. Determine the rated current and starting current of the motor with DOL start. ( b. Determine the starting current of the motor with star-delta. c. Determine the tap setting of an autotransformer if the starting curent needed to be the same as the star-delta start.

Question 5 A 200 HP, 440 V, 1440 rpm, 50 Hz induction motor has a power factor of 0.85 lagging and an efficiency of 90% at full load. If started with rated voltage (DOL), the starting current is 6 times greater than the rated current of the motor. a. Determine the rated current and starting current of the motor with DOL start. ( b. Determine the starting current of the motor with star-delta. c. Determine the tap setting of an autotransformer if the starting curent needed to be the same as the star-delta start.

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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Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

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