The distribution network shown in Figure below is to supply two factories A & B with load curves indicated in Fig. Assume that both factories have lagging power factor of 0.8. a) Select the required sizes of transformers for substation supplying both factories such that in the case of a failure in one transformer the overload on the remaining ones should not exceed 12% . b)Calculate the annual energy losses in the transformers. Assuming that transformers are in operation continuously c) Select the reauired sizes of fuses to be installed at both sides of

The distribution network shown in Figure below is to supply two factories A & B with load curves indicated in Fig. Assume that both factories have lagging power factor of 0.8. a) Select the required sizes of transformers for substation supplying both factories such that in the case of a failure in one transformer the overload on the remaining ones should not exceed 12% . b)Calculate the annual energy losses in the transformers. Assuming that transformers are in operation continuously c) Select the reauired sizes of fuses to be installed at both sides of

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

Compensation Techniques

The compensation techniques are the methods that are employed in the electrical control systems to enhance the performance of the system. The performance are generally affected by the factors like lag in the compensating devices, slow response of the system of the components like sensors used in the control system. The basic compensation technique involves lag compensation, lead compensation or the combination of the both.

Question

The distribution network shown in Figure below is to supply two factories
A & B with load curves indicated in Fig. Assume that both factories have
a lagging power factor of 0.8.
a) Select the required sizes of transformers for substation supplying
both factories such that in the case of a failure in one transformer
the overload on the remaining ones should not exceed 12%.
b)Calculate the annual energy losses in the transformers. Assuming
that transformers are in operation continuously
c) Select the required sizes of fuses to be installed at both sides of
transformers.
d)Select the required size of the 11 kV, XLPE cable for section S1, if
the cable is to be laid direct in ground with a maximum ground
temperature of 30° C.
e) Calculate the maximum expected voltage drop in section S1.
1
400V
11KV, XLPE Cable
Multi-Core Copper
S
A
4 Km
B
S (KVA)
S (KVA)
400
400
300
300
200
200
100
100
Time (hr)
24
Time (hr)
24
12
18
12
18
Load curve of Factory (A)
Load curve of Factory (B)

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