The substation power factor is found from the total reactive and real powers of the various loads that are connected. Based on the given data and figure, Taking three digits after comma for PF, the total apparent power S and the total power factor PF of loads at substation will be:

The substation power factor is found from the total reactive and real powers of the various loads that are connected. Based on the given data and figure, Taking three digits after comma for PF, the total apparent power S and the total power factor PF of loads at substation will be:

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

Assume that a substation supplies three different kinds of loads, mainly, S1=100KVA incandescent lights with PF1=1, S2=300KVA induction
motors with PF2=0.7 lagging, and S3=100KVA synchronous motors with PF3=0.6 Leading, as shown in figure.
Substation
Eincandescent
lights
Elnduction motor
loads
ESynchronous motor
loads
The substation power factor is found from the total reactive and real powers of the various loads that are connected. Based on the given data
and figure, Taking three digits after comma for PF, the total apparent power S and the total power factor PF of loads at substation will be:
Select one:
O a. S=394KVA & PF = 0.940
Ob. S-294KVA & PF = 1
O. S-394KVA & PF = 0.995
Od. None of these
Oe. S-494KVA & PF = 0.995
Of. S=494KVA & PF = 0.940

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