(b) An 18.75 kVA, distribution transformer has a maximum efficiency of 98% at a 15 kVA and unity power factor. Determine the all- day efficiency for the following load cycle of 24 hrs. No. of hours Loading in kW Power factor 12 2 0.5 12 No-load 0.8

(b) An 18.75 kVA, distribution transformer has a maximum efficiency of 98% at a 15 kVA and unity power factor. Determine the all- day efficiency for the following load cycle of 24 hrs. No. of hours Loading in kW Power factor 12 2 0.5 12 No-load 0.8

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 3.65P: Reconsider Problem 3.64 with the change that now Tb includes both a transformer of the same turns...

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

(b) An 18.75 kVA, distribution transformer has a maximum efficiency of 98% at a 15 kVA and
unity power factor. Determine the all- day efficiency for the following load cycle of 24 hrs.
No. of hours
Loading in kW
Power factor
12
0.5
12
0.8
6
No-load

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