3. A Three-phase 440 volt motor operates with a powerfactor of 0.4.Two Wattmeters are connected to measure the input power, and the total power from the mains is 30KW Find the readings of each Wattmeter [Lecture and Refer-1.9 and Discussion] Hint: Power factor coso= 0.4 Total input power = 30KW · Therefore W1+W2 = 30KW- tano = 13 (W2-W1)/(W1+W2) (1) %3D W2-W1 = Solving equation (1) and (2 W13= Watts W2 = Watts

3. A Three-phase 440 volt motor operates with a powerfactor of 0.4.Two Wattmeters are connected to measure the input power, and the total power from the mains is 30KW Find the readings of each Wattmeter [Lecture and Refer-1.9 and Discussion] Hint: Power factor coso= 0.4 Total input power = 30KW · Therefore W1+W2 = 30KW- tano = 13 (W2-W1)/(W1+W2) (1) %3D W2-W1 = Solving equation (1) and (2 W13= Watts W2 = Watts

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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