UPSC Exam > UPSC Questions > A 20 kva 800/480 v distribution taransformer ...
Start Learning for Free
A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation?
Most Upvoted Answer
A 20 kva 800/480 v distribution taransformer has the following resista...
Input Voltage Calculation
- The input voltage of the transformer can be calculated using the formula:
V1 = V2 + I(Zr * cos(θ) + Zx * sin(θ))
where V1 is the input voltage, V2 is the output voltage (480V), I is the rated load current, Zr is the resistance, Zx is the reactance, and θ is the power factor angle.
Calculating Input Voltage
- Given that the power factor is lagging (0.8 pf), the power factor angle (θ) can be calculated as arccos(0.8) = 36.87 degrees.
- Substituting the given values into the formula, we get:
V1 = 480 + I(32*0.8 + 45*0.6) = 480 + I(25.6 + 27) = 480 + 52.6I
Voltage Regulation Calculation
- Voltage regulation is the percentage change in input voltage from no-load to full-load conditions.
- The voltage regulation can be calculated using the formula:
VR = ((V2 - V1) / V1) * 100
Calculating Voltage Regulation
- Substituting the calculated input voltage into the formula, we get:
VR = ((480 - (480 + 52.6I)) / (480 + 52.6I)) * 100
VR = (-52.6I / (480 + 52.6I)) * 100
Explanation
- The input voltage of the transformer is 480 + 52.6I, where I is the rated load current.
- The voltage regulation is calculated as the percentage change in input voltage from no-load to full-load conditions.
- By determining the input voltage and voltage regulation, we can assess the performance and efficiency of the transformer under specified conditions.
- The input voltage of the transformer can be calculated using the formula:
V1 = V2 + I(Zr * cos(θ) + Zx * sin(θ))
where V1 is the input voltage, V2 is the output voltage (480V), I is the rated load current, Zr is the resistance, Zx is the reactance, and θ is the power factor angle.
Calculating Input Voltage
- Given that the power factor is lagging (0.8 pf), the power factor angle (θ) can be calculated as arccos(0.8) = 36.87 degrees.
- Substituting the given values into the formula, we get:
V1 = 480 + I(32*0.8 + 45*0.6) = 480 + I(25.6 + 27) = 480 + 52.6I
Voltage Regulation Calculation
- Voltage regulation is the percentage change in input voltage from no-load to full-load conditions.
- The voltage regulation can be calculated using the formula:
VR = ((V2 - V1) / V1) * 100
Calculating Voltage Regulation
- Substituting the calculated input voltage into the formula, we get:
VR = ((480 - (480 + 52.6I)) / (480 + 52.6I)) * 100
VR = (-52.6I / (480 + 52.6I)) * 100
Explanation
- The input voltage of the transformer is 480 + 52.6I, where I is the rated load current.
- The voltage regulation is calculated as the percentage change in input voltage from no-load to full-load conditions.
- By determining the input voltage and voltage regulation, we can assess the performance and efficiency of the transformer under specified conditions.
Attention UPSC Students!
To make sure you are not studying endlessly, EduRev has designed UPSC study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in UPSC.
|
Explore Courses for UPSC exam
|
|
Similar UPSC Doubts
Top Courses for UPSCView all
A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation?
Question Description
A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation?.
A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation?.
Solutions for A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? in English & in Hindi are available as part of our courses for UPSC.
Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
Here you can find the meaning of A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? defined & explained in the simplest way possible. Besides giving the explanation of
A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation?, a detailed solution for A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? has been provided alongside types of A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? theory, EduRev gives you an
ample number of questions to practice A 20 kva 800/480 v distribution taransformer has the following resistance and ractance Rr 32ohms,RI 0.05 ohms xr 45ohms,xs 0.06ohms,Rc 250kohms,xu 30 kohm,, assume that this Transformer is supplying rated load at 480v and 0.8 pf lagging, what is this Transformer input voltage? What is its voltage requlation? tests, examples and also practice UPSC tests.
|
|
Explore Courses for UPSC 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