3. A single phase motor draws 20 kVA at 0.70 lagging power factor from a 120 V source. ThePUD desires to improve the power factor to 0.9 lagging by connecting a shunt capacitor bankacross the terminals of the motor. Determine the size of the capacitor bank in VARS. Calculatethe following: [SO 1]а)What are the initial load current, real and reactive powers of the load?b)What are the real and reactive power after adding the capacitor bank?c)What is the KVA rating of the capacitor bank? (3)d) What is the load current?di) How is the load current affected by the load reactive power?

Load current, IL=SV×cos∅Active power, P=S×cos∅Reactive Power, Q=S×sin∅

3. A single phase motor draws 20 kVA at 0.70 lagging power factor from a 120 V source. The PUD desires to improve the power factor to 0.9 lagging by connecting a shunt capacitor bank across the terminals of the motor. Determine the size of the capacitor bank in VARS. Calculate the following: [SO 1] a) What are the initial load current, real and reactive powers of the load? What are the real and reactive power after adding the capacitor bank? c) b) What is the kVAr rating of the capacitor bank? (3) d) What is the load current? di) How is the load current affected by the load reactive power?

3. A single phase motor draws 20 kVA at 0.70 lagging power factor from a 120 V source. The PUD desires to improve the power factor to 0.9 lagging by connecting a shunt capacitor bank across the terminals of the motor. Determine the size of the capacitor bank in VARS. Calculate the following: [SO 1] a) What are the initial load current, real and reactive powers of the load? What are the real and reactive power after adding the capacitor bank? c) b) What is the kVAr rating of the capacitor bank? (3) d) What is the load current? di) How is the load current affected by the load reactive power?

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...

See similar textbooks

Similar questions

choose
pls find a and b
Draw the per-phase equivalent circuit of a three-phase squirrel-cage induction machine. List all of the elements in the equivalent circuit and briefly state their function
help
Q9
a syn A: A sylienfonotus generator of 100 MVA, 22 kV, and 0.25 pu transient reactance supplies a motor of 50 MVA, 22 kV, and 0.2 pu transient reactance. The motor is drawing 40 MW at 0.8 power factor leading and terminal voltage of 21.9 kV. The line connecting them has a reactance of 0.05 pu on a base of 100 MVA. Find the transient currents in the generator, the motor, and the fault when a 3-ph fault occurs at the motor terminals. Take SB = 100 MVA, VB = 22 kV, and use the internal voltages %3D %3D of the machines method.
3. One phase of a 3-phase alternator consist of 12 coils in series. Each coil has an rms voltage of 10V induced in it and the coils are arranged in slots so that there is a successive phase displacement of 10 electrical degrees between the emf in each coil an the next. Find by calculation the rms value of the total phase voltage developed by the winding. If the alternator has six pole and is driven at 100 rpm.
V1 = 170 V f1 = 100 Hz 1) A single-phase load has an active power of P = 2 kW at V1 V @f1Hz and the power factor is cosφ = 0.75. This motor iscompensated to cosφ = 0.85 using a parallel capacitor Find the reactive power difference between compensated and uncompensated status (which will give the capacitor power) and calculate XC and C using the power difference value?
V1 = 170 V f1 = 100 Hz 1) A single-phase load has an active power of P = 2 kW at V1 V @f1Hz and the power factor is cosφ = 0.75. This motor iscompensated to cosφ = 0.85 using a parallel capacitor Reactive power and apparent power after compensation?
and explain why
In Transformers: a. What is the relationship between the turns ratio and the primary to secondarycurrent ratio ? b. What is the relationship between the turns ratio and the primary and secondaryvoltage ratio? c. What can you conclude about the relationship in the values of primary andsecondary apparent power?