If the per unit reactance of a power system up to the fault point is 0.2pu and base power (VA) is 10 MVA. then the fault level (VA, is02 MVAO 500 MVAO 100 MVAO 50 MVA One disadvantage of low power factor isO Increases the voltage drop in the systemO Reduces electricity billsO Reduces conductor sizesO Reduces copper losses

Falut mva = base mva /perunit reactance Fault mva = 10/0.2 = 50mva

Answered: One disadvantage of low power factor is…

One disadvantage of low power factor is O Increases the voltage drop in the system O Reduces electricity bills O Reduces conductor sizes O Reduces copper losses

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.4MCQ

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

Question

If the per unit reactance of a power system up to the fault point is 0.2pu and base power (VA) is 10 MVA. then the fault level (VA, is
02 MVA
O 500 MVA
O 100 MVA
O 50 MVA

One disadvantage of low power factor is
O Increases the voltage drop in the system
O Reduces electricity bills
O Reduces conductor sizes
O Reduces copper losses

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