(c)Q.2(a) (i) Briefly explain TWO major power losses in a power transformer.(ii) Suggest one method to reduce each power losses in Q.2(a)(i).(b) A single-phase transformer, 30 kVA, 1000 V/ 415 V, 50 Hz has the followingtest results:Open-circuit test: 1000 V, 1 A, 800 W (measured at the high voltage side)Short-circuit test: 120 V, 20 A, 1200 W (measured at the high voltage side)(i) By referring all parameters to the high voltage side, calculate the equivalentwinding resistance Reqi, equivalent winding reactance Xeql, the coreinternal resistance, R. and magnetizing reactance, Xm value.(ii) A full load with a 0.9 lagging power factor is connected to the transformer.Calculate the transformer's voltage regulation and efficiency.(iii) Determine the transformer's maximum efficiency when the load is at 0.9power factor lagging.Figure Q.2(c) shows the Y-A configuration of a three-phase power transformer.Give two reasons why this configuration is preferred as a step-up transformer.bFigure Q.2(c)b

Since you have posted the multiple questions with multiple support. so we are supposed to answer 1st…

2 (a) (i) Briefly explain TWO major power losses in a power (ii) Suggest one method to reduce each power losses in Q.2(a)(i). (b) A single-phase transformer, 30 kVA, 1000 V/ 415 V, 50 Hz has the following test results: side)

2 (a) (i) Briefly explain TWO major power losses in a power (ii) Suggest one method to reduce each power losses in Q.2(a)(i). (b) A single-phase transformer, 30 kVA, 1000 V/ 415 V, 50 Hz has the following test results: side)

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Sen 2.5 2.5 A 16,25 kVA, 220/440 V, 60 Hz transformer gave the following test results. Open circuit test (440 V side open): 220 V, 9.5 A, 650 W Short-circuit test (220 V side shorted): 37.5 V, 55 A, 950 W (a) Derive the approximate equivalent circuit in per-unit values. (b) Determine the voltage regulation at full load, 0.8 PF lagging. (c) Draw the phasor diagram for condition (b).
the subject is : Transformers
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