Assume that a three-phase 700KW, 50 Hz, 4200V (Line to Line) Wye-connected induction motor has a full-load efficiency (n) of 100% and a lagging power factor of 0.75 and is connected to a feeder. If it is desired to correct the power factor of the load to a lagging power factor of 0.9 by connecting three capacitors (capacitor bank) at the load as shown in the figure a VLL b VLL IL Motor PF Lagging KW CAPACITOR BANK If QC is rating of the capacitor bank in KVAR that should be connected in parallel with motor and if C is the capacitance of each unit if the capacitors are connected in delta, in microfarads Taking two digits after comma, then QC and C will be Select one: O a. QC = 475.12 KVAR &C = 12.63 Microfarad Ob. QC = 675.12 KVAR &C = 42.63 Microfarad O. QC = 775.12 KVAR & C = 42.63 Microfarad Od. QC = 575.12 KVAR &C = 32.63 Microfarad O e. QC = 375.12 KVAR & C = 22.63 Microfarad Of. None of these

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
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.21P: An industrial plant consisting primarily of induction motor loads absorbs 500 kW at 0.6 power factor...
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Assume that a three-phase 700KW, 50 Hz, 4200V (Line to Line) Wye-connected induction motor has a full-load efficiency (n) of 100% and a
lagging power factor of 0.75 and is connected to a feeder. If it is desired to correct the power factor of the load to a lagging power factor of
0.9 by connecting three capacitors (capacitor bank) at the load as shown in the figure
a
VLL
b
VLL
IL
Motor PF
KW
Lagging
CAPACITOR BANK
If QC is rating of the capacitor bank in KVAR that should be connected in parallel with motor and if C is the capacitance of each unit if the
capacitors are connected in delta, in microfarads
Taking two digits after comma, then QC and C will be
Select one:
O a. QC = 475.12 KVAR &C = 12.63 Microfarad
O b. QC = 675.12 KVAR &C = 42.63 Microfarad
O. QC = 775.12 KVAR & C = 42.63 Microfarad
Od. QC = 575.12 KVAR &C = 32.63 Microfarad
O e. QC = 375.12 KVAR & C = 22.63 Microfarad
Of.
None of these
Transcribed Image Text:Assume that a three-phase 700KW, 50 Hz, 4200V (Line to Line) Wye-connected induction motor has a full-load efficiency (n) of 100% and a lagging power factor of 0.75 and is connected to a feeder. If it is desired to correct the power factor of the load to a lagging power factor of 0.9 by connecting three capacitors (capacitor bank) at the load as shown in the figure a VLL b VLL IL Motor PF KW Lagging CAPACITOR BANK If QC is rating of the capacitor bank in KVAR that should be connected in parallel with motor and if C is the capacitance of each unit if the capacitors are connected in delta, in microfarads Taking two digits after comma, then QC and C will be Select one: O a. QC = 475.12 KVAR &C = 12.63 Microfarad O b. QC = 675.12 KVAR &C = 42.63 Microfarad O. QC = 775.12 KVAR & C = 42.63 Microfarad Od. QC = 575.12 KVAR &C = 32.63 Microfarad O e. QC = 375.12 KVAR & C = 22.63 Microfarad Of. None of these
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