Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Two 3-phase, Y-connected alternators are to b...
Start Learning for Free
Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)
Correct answer is '16.98'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Two 3-phase, Y-connected alternators are to be paralleled to a set of ...
Given that the armature has per phase synchronous reactance of 1.7Ω and two alternators are connected in parallel.
So,
Both alternator voltage are in phase
So,
Synchronizing current or circulating current
Reactance of both alternator are same
So,
Free Test
FREE
| Start Free Test |
Community Answer
Two 3-phase, Y-connected alternators are to be paralleled to a set of ...
Ohms and a per phase resistance of 0.1 ohms. The field current is adjusted to maintain the rated voltage of 480 V at full load. If the rated load of each alternator is 1000 kVA, determine the line current and power factor of each alternator at full load.
To determine the line current at full load, we can use the formula:
Line current = Rated load / (√3 * Rated voltage)
Line current = 1000 kVA / (√3 * 480 V)
Line current = 1000 * 1000 VA / (√3 * 480 V)
Line current = 1736.81 A
The power factor of each alternator at full load can be calculated using the formula:
Power factor = Cos(θ) = R / Z
Where R is the resistance and Z is the impedance (square root of the sum of the resistance squared and the reactance squared).
Impedance (Z) = √(Resistance^2 + Reactance^2)
Impedance (Z) = √(0.1^2 + 1.7^2)
Impedance (Z) = √(0.01 + 2.89)
Impedance (Z) = √2.9
Impedance (Z) = 1.7 ohms
Power factor = 0.1 ohms / 1.7 ohms
Power factor = 0.0588
Therefore, the line current of each alternator at full load is 1736.81 A and the power factor is 0.0588.
To determine the line current at full load, we can use the formula:
Line current = Rated load / (√3 * Rated voltage)
Line current = 1000 kVA / (√3 * 480 V)
Line current = 1000 * 1000 VA / (√3 * 480 V)
Line current = 1736.81 A
The power factor of each alternator at full load can be calculated using the formula:
Power factor = Cos(θ) = R / Z
Where R is the resistance and Z is the impedance (square root of the sum of the resistance squared and the reactance squared).
Impedance (Z) = √(Resistance^2 + Reactance^2)
Impedance (Z) = √(0.1^2 + 1.7^2)
Impedance (Z) = √(0.01 + 2.89)
Impedance (Z) = √2.9
Impedance (Z) = 1.7 ohms
Power factor = 0.1 ohms / 1.7 ohms
Power factor = 0.0588
Therefore, the line current of each alternator at full load is 1736.81 A and the power factor is 0.0588.
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
Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer?
Question Description
Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. 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 Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. 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 Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer?.
Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. 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 Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. 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 Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer?.
Solutions for Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. 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 Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer?, a detailed solution for Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer? has been provided alongside types of Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Two 3-phase, Y-connected alternators are to be paralleled to a set of common busbars. The armature has a per phase synchronous reactance of 1.7Ω and negligible armature resistance. The line voltage of the first machine is adjusted to 3,300 V and that of the second machine is adjusted to 3,200 V. The machine voltages are in phase at the instant they are paralleled. Under this condition, the synchronising current per phase (in A) will be (Answer up to two decimal places)Correct answer is '16.98'. 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
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup