3. Find all-day efficiency of a transformer having a maximum efficiency of 98% at 15 kVA at unity power factor and loaded as follows: 12 hours: 2 kW at 0-5 p.f. lag 6 hours : 12 kW at 0.8 p.f. lag 6 hours: at no load 195-3%

3. Find all-day efficiency of a transformer having a maximum efficiency of 98% at 15 kVA at unity power factor and loaded as follows: 12 hours: 2 kW at 0-5 p.f. lag 6 hours : 12 kW at 0.8 p.f. lag 6 hours: at no load 195-3%

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 3.4MCQ: An ideal transformer has no real or reactive power loss. (a) True (b) False

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3. Find all-day efficiency of a transformer having a maximum efficiency of 98% at 15 kVA at unity power
factor and loaded as follows:
12 hours:
2 kW at 0-5 p.f. lag
6 hours :
12 kW at 0-8 p.f. lag
6 hours:
at no load
195-3%

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