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Three non-reactive loads are connected in delta across a three-phase, three-wire 400 V supply in the following way: ⚫10 kW between the red and yellow lines; • 6 kW between the yellow and blue lines; and • 4 kW between the blue and red lines. Two wattmeters are available to measure the total power drawn by the three-phase load. If the current coil of one of the wattmeter (W₁) is connected in the red line, and its voltage coil connected across the red and yellow lines, calculate: i. The power measured by wattmeter, W₁. ii. The power that would be measured by the other wattmeter (W2) if it was correctly connected. iii. The overall power factor of the three-phase load.

Three non-reactive loads are connected in delta across a three-phase, three-wire 400 V supply in the following way: ⚫10 kW between the red and yellow lines; • 6 kW between the yellow and blue lines; and • 4 kW between the blue and red lines. Two wattmeters are available to measure the total power drawn by the three-phase load. If the current coil of one of the wattmeter (W₁) is connected in the red line, and its voltage coil connected across the red and yellow lines, calculate: i. The power measured by wattmeter, W₁. ii. The power that would be measured by the other wattmeter (W2) if it was correctly connected. iii. The overall power factor of the three-phase load.

Introductory Circuit Analysis (13th Edition)
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 non-reactive loads are connected in delta across a three-phase, three-wire 400 V supply in the following way: ⚫10 kW between the red and yellow lines; • 6 kW between the yellow and blue lines; and • 4 kW between the blue and red lines. Two wattmeters are available to measure the total power drawn by the three-phase load. If the current coil of one of the wattmeter (W₁) is connected in the red line, and its voltage coil connected across the red and yellow lines, calculate: i. The power measured by wattmeter, W₁. ii. The power that would be measured by the other wattmeter (W2) if it was correctly connected. iii. The overall power factor of the three-phase load.
Transcribed Image Text:Three non-reactive loads are connected in delta across a three-phase, three-wire 400 V supply in the following way: ⚫10 kW between the red and yellow lines; • 6 kW between the yellow and blue lines; and • 4 kW between the blue and red lines. Two wattmeters are available to measure the total power drawn by the three-phase load. If the current coil of one of the wattmeter (W₁) is connected in the red line, and its voltage coil connected across the red and yellow lines, calculate: i. The power measured by wattmeter, W₁. ii. The power that would be measured by the other wattmeter (W2) if it was correctly connected. iii. The overall power factor of the three-phase load.
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