19. Two watt-meter method is applied to a 3-phase motor running at full-load. The two wattmeter indicate 85.5kW and 34.7 kW. What is the operating p.f. of the motor?c. 80.69%d. 94.76%а. 87.45%b. 89.49%20. A 3-phase feeder carries two lagging balance loads. The power observed by each is measured by twowattmeter method, giving the following reading1s* load: Wi = 160 kW W2 = 96 kW2nd load: W, = 90 kW W2 = 48 kWWhat is the combined kVA load on the feeder?а. 434.68C. 462.35b. 504.24d. 420.12

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19. Two watt-meter method is applied to a 3-phase motor running at full-load. The two wattmeter indicate 85.5 kW and 34.7 kW. What is the operating p.f. of the motor? a. 87.45% c. 80.69% d. 94.76% b. 89.49%

19. Two watt-meter method is applied to a 3-phase motor running at full-load. The two wattmeter indicate 85.5 kW and 34.7 kW. What is the operating p.f. of the motor? a. 87.45% c. 80.69% d. 94.76% b. 89.49%

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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Concept explainers

Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

19. Two watt-meter method is applied to a 3-phase motor running at full-load. The two wattmeter indicate 85.5
kW and 34.7 kW. What is the operating p.f. of the motor?
c. 80.69%
d. 94.76%
а. 87.45%
b. 89.49%
20. A 3-phase feeder carries two lagging balance loads. The power observed by each is measured by two
wattmeter method, giving the following reading
1s* load: Wi = 160 kW W2 = 96 kW
2nd load: W, = 90 kW W2 = 48 kW
What is the combined kVA load on the feeder?
а. 434.68
C. 462.35
b. 504.24
d. 420.12

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