0
Image result for Why phases in transmission line are transposed?
Transposition is the periodic swapping of positions of the conductors of a transmission line, in order to reduce crosstalk and otherwise improve transmission. ... Transposition also equalizes their impedance relative to the ground, thus avoiding one-sided loads in three-phase electric power systems.
Anonymous
Add your answer:
Earn +20 pts
Why use transposition tower in long transmission line?
A 'transposed' tower is one where the vertical sequence of lines on one side of the tower is red-yellow-blue (or A-B-C), while the sequence on the other side is blue-yellow-red (or C-B-A). The effect of this is to introduce some degree of cancellation between the magnetic fields -approximately inversely proportional to the cube of the horizontal distance away from the line, thus reducing the flux density of the magnetic field on either side of the line. In other words, it offers a means of reducing the exposure to the line's electromagnetic field. In the UK, most tower lines are transposed.
Will low pass filter works as transmission line?
No, but transmission line act as a lpf
The output voltage between phases of ac 3 phase supply is 240V?
No, this voltage appears ACROSS individual phases, or BETWEEN a line conductor and the neutral
Who uses pole and transmission line hardware?
Pole and transmission line hardware is purchased by cable television and utility companies
Calculations on input impedance of a transmission lines?
I assume you are wanting to know about balancing networks to a transmission line? If this is the case, you really need to get a book on networks and filters. The physical makup of the transmission line will impact this calculation. The basic idea is you want to match the impedance at the input (looking out of the transmission line) to the same impedance as the transmission line (say 50 or 75 ohms for typical coax), and the output impedance (looking out of the transmission line) to the same as well. This will result in maximum power transfer, minimum power reflection. If you want to know how to make a balancing filter to a transmission line, then you need to design the filter according to your requirements - chebyshev, minimum ripple, wide band, narrow band, etc; You may need to use transformers to isolate the transmission line from your power circuitry, and use this as a matching network. You could also use transistors to accomplish similar things (less isolation, though), depending on what you're trying to do.
Why phases in a transmission line need to be transposed?
Transposition means exchanging of the position of the transmission line after equal distances. Even if the voltage across the conductors are equal during the transmission, there will be slight differences and will result in varied inductances of the conductors. Hence if we have symmetrical conductors running through transmission line in a similar fashion, there may be unbalances in voltage. Also mutual inductances vary for untransposed lines.
How many phase are there from transmission line from Oregon?
AC transmission lines are 3-phase, DC transmission lines don't have phases. It doesn't matter where they are from.
Why transmission lines are transposed?
To avoid inteference between communication lines
When a melody is transposed to another key what remains the same?
the shape of the melodic line
What is symmetrical fault in transmission line?
A symmetrical fault is a fault where all three phases are experiencing the same thing. This is also called a three phase fault, since all three phases are involved.
What is a sentence with transposed?
I accidentally transposed the second and third numbers in the sequence.
How do you spell transposed?
That is the correct spelling of the adjective "transposed" (switched in position).
What is corona power loss in transmission line hvdc?
A: Transmission lines while there is ceramic insulators providing separation to the phases will have a corona if the insulators are dirty providing small current leakage ionizing the air around it therefore corona effect.
Why use transposition tower in long transmission line?
A 'transposed' tower is one where the vertical sequence of lines on one side of the tower is red-yellow-blue (or A-B-C), while the sequence on the other side is blue-yellow-red (or C-B-A). The effect of this is to introduce some degree of cancellation between the magnetic fields -approximately inversely proportional to the cube of the horizontal distance away from the line, thus reducing the flux density of the magnetic field on either side of the line. In other words, it offers a means of reducing the exposure to the line's electromagnetic field. In the UK, most tower lines are transposed.
What does the line on a phase diagram represents?
This line is a boundary between two phases.
How do you change transmission line?
how to fix a transmission without taking it a part how to fix a transmission line
How are the conditions pressure and temperature at which two phases coexist in equilibrium shown on a phase diagram?
By a line separating the phases
