3. A 500/250 V, 1-phase transformer has constant losses of 150 W. When delivering an output of 8 kW to a load, the transformer takes 21 A at a p.f. of 0-8 lagging from 500 V supply. Calculate the variable losses of the transformer at this load.

3. A 500/250 V, 1-phase transformer has constant losses of 150 W. When delivering an output of 8 kW to a load, the transformer takes 21 A at a p.f. of 0-8 lagging from 500 V supply. Calculate the variable losses of the transformer at this 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 3.63P: A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a...

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3. A 500/250 V, 1-phase transformer has constant losses of 150 W. When delivering an output of 8 kW to
a load, the transformer takes 21 A at a p.f. of 0-8 lagging from 500 V supply. Calculate the variable losses
of the transformer at this load.

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