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...
Related questions
Question
![3. A Three phase 440 volt motor operates with a powerfactor of 04.Two Wattnmeters 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 = V3 (W2-W1)/(W1+W2)
(1)
W2-W1 =
Solving equation (1) and (2
WI=
Watts
W2 =
Watts
States)
近](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F629a3078-dced-4e28-9b2a-b208510296bc%2F7ba7fe0f-1c01-44ad-a333-8ea0d7c1b179%2Fti4ogws_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3. A Three phase 440 volt motor operates with a powerfactor of 04.Two Wattnmeters 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 = V3 (W2-W1)/(W1+W2)
(1)
W2-W1 =
Solving equation (1) and (2
WI=
Watts
W2 =
Watts
States)
近
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