A 400 V, 3-phase, 4 wire system is has balanced loads and is fed from a 11kV/400 V, 3-phase transformer as shown in fig.3.The impedance of section oa and ab is consider as 0.05 + j0.04 and 0.1 + j0.05 Q respectively. Determine the following: a. the total voltage drop of the system; b. Total active power per phase; c. Total reactive power per phase; d. the total (3-phase) kVA output of transformer and its load power factor 11kV 400V 60 A 50 A 0.9 lag 0.8 lag Fig.3 (a) 32.45 V (b) 31.714 kW (c) 42.973 KVAR (d) 95.88 kVA, 0.95 lagging (a) 12.45 V (b) 21.714 kW (c) 12.973 KVAR (d) 75.88 kVA, 0.86 lagging (a) 22.45 V (b) 31.714 kW (c) 22.973 KVAR (d) 85.88 kVA, 0.96 lagging None of these

A 400 V, 3-phase, 4 wire system is has balanced loads and is fed from a 11kV/400 V, 3-phase transformer as shown in fig.3.The impedance of section oa and ab is consider as 0.05 + j0.04 and 0.1 + j0.05 Q respectively. Determine the following: a. the total voltage drop of the system; b. Total active power per phase; c. Total reactive power per phase; d. the total (3-phase) kVA output of transformer and its load power factor 11kV 400V 60 A 50 A 0.9 lag 0.8 lag Fig.3 (a) 32.45 V (b) 31.714 kW (c) 42.973 KVAR (d) 95.88 kVA, 0.95 lagging (a) 12.45 V (b) 21.714 kW (c) 12.973 KVAR (d) 75.88 kVA, 0.86 lagging (a) 22.45 V (b) 31.714 kW (c) 22.973 KVAR (d) 85.88 kVA, 0.96 lagging None of these

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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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

A 400 V, 3-phase, 4 wire system is has balanced loads and is fed from a 11kV/400 V, 3-phase transformer as shown in fig.3.The impedance of section oa and ab is consider as 0.05 + j0.04 S
and 0.1 + j0.05 respectively. Determine the following:
a. the total voltage drop of the system;
b. Total active power per phase;
c. Total reactive power per phase;
d. the total (3-phase) kVA output of transformer and its load power factor
11kV
400V
60 A
50 A
0.9 lag 0.8 lag
Fig.3
(a) 32.45 V
(b) 31.714 kW (c) 42.973 KVAR (d) 95.88 kVA, 0.95 lagging
(a) 12.45 V
(b) 21.714 kW
(c) 12.973 KVAR (d) 75.88 kVA, 0.86 lagging
O (a) 22.45 V
(b) 31.714 kW (c) 22.973 KVAR (d) 85.88 kVA, 0.96 lagging
None of these

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