Answered: A substation rated 1250 kVA is…

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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Question

A substation rated 1250 kVA is operating at full-load at 0.8 pf lagging and to carry an
additional load of 170 kW at 0.85 pf lagging. With the mentioned power factor, the
substation is experiencing inefficient electrical system: high power losses, high voltage
drops in the electrical equipment, and high electricity bill. To reduce power losses and to
reduce the electricity bill, power factor correction is to be of high importance and
consideration.

With this condition, the substation is considering of two alternatives namely:
Alternative A: To increase the capacity of the substation
Alternative B: To add shunt power capacitor

In this regard, the owner requested to prepare a summary report consisting of the
following details:
1. A rightful power phasor diagram.

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