3. : A 400 kVA, distribution transformer has full load iron loss of 2.5 kW and copper loss of 3.5 kW. During a day, its load cycle for 24 hours is, 6 hours 300 kW at 0.8 p.f. 10 hours 200 kW at 0.7 p.f. 4 hours 100 kW at 0.9 p.f. 4 hours No load Determine its all day efficiency.

3. : A 400 kVA, distribution transformer has full load iron loss of 2.5 kW and copper loss of 3.5 kW. During a day, its load cycle for 24 hours is, 6 hours 300 kW at 0.8 p.f. 10 hours 200 kW at 0.7 p.f. 4 hours 100 kW at 0.9 p.f. 4 hours No load Determine its all day efficiency.

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 3.15P: Rework Problem 3.14 if the transformer is delivering rated load at rated secondary voltage and at...

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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

3.
: A 400 kVA, distribution transformer has full load iron loss of 2.5 kW
and copper loss of 3.5 kW. During a day, its load cycle for 24 hours is,
6 hours 300 kW at 0.8 p.f.
10 hours 200 kW at 0.7 p.f.
4 hours 100 kW at 0.9 p.f.
4 hours No load
Determine its all day efficiency.

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