Q2/A/ What are the conditions for satisfying parallel operation of single phase transformer?Deduce an expression for the load shared by the two transformers in parallel when thetransformers have equal voltage ratio? Prove your answer.B/ A 50 KVA, 2300/230 V, 60 11z transformer has a high voltage winding resistance of0.650 and a low-voltage winding resistance of 0.0065 2. Laboratory tests showed thefollowing results:Open circuit test: V == 230 V, I =5.7A, P = 190 WShort circuit test: V-41.5 V, I-21.7 A, P-No wattmeter was used.18(2) Compute the value of primary voltage needed to give rated secondary voltage when thetransformer is connected as a step-up one and is delivering 50 KVA at a power factor of 0.8lagging. (b) Compute the efficiency under conditions of part (a).

Answered: 02/A/ What are the conditions for…

02/A/ What are the conditions for satisfying parallel operation of single phase transformer? Deduce an expression for the load shared by the two transformers in parallel when the Transfor

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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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

Q2/A/ What are the conditions for satisfying parallel operation of single phase transformer?
Deduce an expression for the load shared by the two transformers in parallel when the
transformers have equal voltage ratio? Prove your answer.
B/ A 50 KVA, 2300/230 V, 60 11z transformer has a high voltage winding resistance of
0.650 and a low-voltage winding resistance of 0.0065 2. Laboratory tests showed the
following results:
Open circuit test: V =
= 230 V, I =5.7A, P = 190 W
Short circuit test: V-41.5 V, I-21.7 A, P-No wattmeter was used.
18
(2) Compute the value of primary voltage needed to give rated secondary voltage when the
transformer is connected as a step-up one and is delivering 50 KVA at a power factor of 0.8
lagging. (b) Compute the efficiency under conditions of part (a).

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