Calculate the all-day efficiency of a 100-kVA transformer operating under the following conditions: 6 hours on a load of 50 kW at 0.73 power factor; 3 hours on a load of 90 kW at 0.82 power factor; 15 hours with no load on secondary. The iron loss is 1,000 Watts and the full-load copper loss is 1, 060 Watts.

Calculate the all-day efficiency of a 100-kVA transformer operating under the following conditions: 6 hours on a load of 50 kW at 0.73 power factor; 3 hours on a load of 90 kW at 0.82 power factor; 15 hours with no load on secondary. The iron loss is 1,000 Watts and the full-load copper loss is 1, 060 Watts.

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 3.33P: Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage...

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