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.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.28P: For the system shown in Figure 3.34. draw an impedance diagram in per unit by choosing 100 kVA to be...

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