The primary of a certain transformer takes 0.7 A at a power factor of 0.5 when it is connected across 200 V, 50 Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 10 A at a lagging power factor of 0.8 is now connected across the secondary. Calculate the primary current and power factor. Draw the phasor diagram.

The primary of a certain transformer takes 0.7 A at a power factor of 0.5 when it is connected across 200 V, 50 Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 10 A at a lagging power factor of 0.8 is now connected across the secondary. Calculate the primary current and power factor. Draw the phasor diagram.

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 3.5MCQ: For an ideal 2-winding transformer, an impedance Z2 connected across winding 2 (secondary) is...

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