3. Find the all-day efficiency of 600 kVA distribution transformer whose Cu loss andiron loss at full-load is 5.5 kW and 4.5 kW, respectively. During a day of 24 hours, it isloaded under:No. of Hours8610Loading in kW550400450Power Factor0.80.700.84. Transformer is 7 kVA, 220/110 V transformer with Res= 0.7 ohm and Xes=0.8 ohm.It is connected in parallel with transformer 2 which is 10 kVA, 220/110 V transformerwith Res= 0.4 ohm and Xes=0.5 ohm. The common load is an inductive load thatneeds 150 A at a lagging power factor of 0.8.a.) Solve for the current supplied by transformer 1.b.) At what percent rating is transformer working?c.) Determine the power factor of transformer 1

Answered: Image /qna-images/answer/ddd0fbe4-9f10-4e3c-a944-7ebfb4d725b9.jpg

3. Find the all-day efficiency of 600 kVA distribution transformer whose Cu loss and iron loss at full-load is 5.5 kW and 4.5 kW, respectively. During a day of 24 hours, it is loaded under: No. of Hours 8 6 10 Loading in kW 550 400 450 Power Factor 0.8 0.70 0.8

3. Find the all-day efficiency of 600 kVA distribution transformer whose Cu loss and iron loss at full-load is 5.5 kW and 4.5 kW, respectively. During a day of 24 hours, it is loaded under: No. of Hours 8 6 10 Loading in kW 550 400 450 Power Factor 0.8 0.70 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 3.55P: A single-phase l0-kVA,2300/230-volt,60-Hz two-winding distribution transformer is connected as an...

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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. Find the all-day efficiency of 600 kVA distribution transformer whose Cu loss and
iron loss at full-load is 5.5 kW and 4.5 kW, respectively. During a day of 24 hours, it is
loaded under:
No. of Hours
8
6
10
Loading in kW
550
400
450
Power Factor
0.8
0.70
0.8
4. Transformer is 7 kVA, 220/110 V transformer with Res= 0.7 ohm and Xes=0.8 ohm.
It is connected in parallel with transformer 2 which is 10 kVA, 220/110 V transformer
with Res= 0.4 ohm and Xes=0.5 ohm. The common load is an inductive load that
needs 150 A at a lagging power factor of 0.8.
a.) Solve for the current supplied by transformer 1.
b.) At what percent rating is transformer working?
c.) Determine the power factor of transformer 1

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