Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A 30 kV, 50 Hz, 50 MVA generator has the posi...
Start Learning for Free
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimal
Correct answer is between '1.7,1.9'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero ...
Of X1 = 0.15 pu, X2 = 0.25 pu, and X0 = 0.05 pu, respectively. Calculate the short-circuit current at the generator terminals for a three-phase fault at the generator terminals.
Solution:
The short-circuit current can be calculated using the symmetrical component method as follows:
1) Positive sequence current:
I1 = 1/3 * MVA / kV / √3 = 50e6 / 30e3 / √3 = 962.25 A
2) Negative sequence current:
I2 = K * I1 = 0.25 * 962.25 = 240.56 A
3) Zero sequence current:
I0 = K * I1 = 0.05 * 962.25 = 48.11 A
where K = X2 / X1 = 0.25 / 0.15 = 1.67
The total short-circuit current is the vector sum of the three components:
Isc = √(I1^2 + I2^2 + I0^2) = √(962.25^2 + 240.56^2 + 48.11^2) = 996.35 A
Therefore, the short-circuit current at the generator terminals for a three-phase fault is 996.35 A.
Solution:
The short-circuit current can be calculated using the symmetrical component method as follows:
1) Positive sequence current:
I1 = 1/3 * MVA / kV / √3 = 50e6 / 30e3 / √3 = 962.25 A
2) Negative sequence current:
I2 = K * I1 = 0.25 * 962.25 = 240.56 A
3) Zero sequence current:
I0 = K * I1 = 0.05 * 962.25 = 48.11 A
where K = X2 / X1 = 0.25 / 0.15 = 1.67
The total short-circuit current is the vector sum of the three components:
Isc = √(I1^2 + I2^2 + I0^2) = √(962.25^2 + 240.56^2 + 48.11^2) = 996.35 A
Therefore, the short-circuit current at the generator terminals for a three-phase fault is 996.35 A.
Free Test
FREE
| Start Free Test |
Community Answer
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero ...
Given that,
X1 = 0.25 pu
X2 = 0.15 pu
X0 = 0.05 pu
Fault current for LG fault
Fault current for three phase fault,
Given that both the fault currents are equal.
⇒ Xn = 0.1 pu
Base kV = 30 kV
Base MVA = 50 MVA
X1 = 0.25 pu
X2 = 0.15 pu
X0 = 0.05 pu
Fault current for LG fault
Fault current for three phase fault,
Given that both the fault currents are equal.
⇒ Xn = 0.1 pu
Base kV = 30 kV
Base MVA = 50 MVA
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer?
Question Description
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer?.
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer?.
Solutions for A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer?, a detailed solution for A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? has been provided alongside types of A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A 30 kV, 50 Hz, 50 MVA generator has the positive, negative, and zero sequence reactance’s of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The neutral of the generator is grounded with a reactance so that the fault current for a bolted LG fault and that of a bolted three-phase fault at the generator terminal are equal. The value of grounding reactance in ohms (round off to one decimalCorrect answer is between '1.7,1.9'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup