Exercises on Symmetrical Components1. The line currents in a 3-ph 4 –wire system are l, = 100<30; I, = 50<300"; I, = 30<180°.Find the symmetrical components and the neutral current.2. The sequencec component voltages of phasc voltages of a 3-ph system arc:Van = 100 <0° v; Va = 223.6 <-26.6" V: V = 100 <180" V. Detemine the phasevoltages.3. The two seq. components and the corresponding phase voltage of a 3-ph system areV,0 =1<-60° V; V,-2<0"V ; & Va = 3 <0°V. Determine the other phase voltages.4. Determine the sequence components if I, =10<60° A; I, =10<-60° A; Ic = 10<180° A.5. The line b of a 3-ph line feeding a balanced Y-load with neutral grounded is openresulting in line currents: I, = 10-0" A & I, = 10<120° A. Determine the sequence currentcomponents.6. One conductor of a 3-ph line feeding a balanced delta-load is open. Assuming that line cis open, if current in line a is 10<0" A, determine the sequence components of the linecurrents7. Given Va S253°, V= 72-164°, V.= 7210s°, find the symmetrical components. Thephase components are shown in the phasor form belowVa105164Unbalanced condition8. Given Vo -3,5 4 122", Vi- 5.0 2-10", V2- 1.9 292°, find the phase sequencecomponentsII

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Answered: 1. The line currents in a 3-ph 4 -wire…

1. The line currents in a 3-ph 4 -wire system are I, = 100<30°; I, = 50<300"; I. = 30<180°. Find the symmetrical components and the neutral current.

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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Concept explainers

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Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

Question

Exercises on Symmetrical Components
1. The line currents in a 3-ph 4 –wire system are l, = 100<30; I, = 50<300"; I, = 30<180°.
Find the symmetrical components and the neutral current.
2. The sequencec component voltages of phasc voltages of a 3-ph system arc:
Van = 100 <0° v; Va = 223.6 <-26.6" V: V = 100 <180" V. Detemine the phase
voltages.
3. The two seq. components and the corresponding phase voltage of a 3-ph system are
V,0 =1<-60° V; V,-2<0"V ; & Va = 3 <0°V. Determine the other phase voltages.
4. Determine the sequence components if I, =10<60° A; I, =10<-60° A; Ic = 10<180° A.
5. The line b of a 3-ph line feeding a balanced Y-load with neutral grounded is open
resulting in line currents: I, = 10-0" A & I, = 10<120° A. Determine the sequence current
components.
6. One conductor of a 3-ph line feeding a balanced delta-load is open. Assuming that line c
is open, if current in line a is 10<0" A, determine the sequence components of the line
currents
7. Given Va S253°, V= 72-164°, V.= 7210s°, find the symmetrical components. The
phase components are shown in the phasor form below
Va
105
164
Unbalanced condition
8. Given Vo -3,5 4 122", Vi- 5.0 2-10", V2- 1.9 292°, find the phase sequence
components
II

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