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Advantages and disadvantages of underground and overhead cables?
Overhead transmission lines are less expensive, in most cases, significantly less expensive, than underground cables. Underground transmission cables require insulation, cooling systems, and -the most expensive feature- excavation!
What is the purpose of insulator in overhead transmission line?
Overhead lines are uninsulated, as they depend upon the air to provide insulation. However, they must still be insulated from the towers or poles from which they are suspended. This insulation is provided using glass or ceramic insulators. The greater the line voltage, the longer the ceramic insulator, or the greater the number of glass insulator 'dishes'.
What is the difference between overhead transmission line and under ground transmission line?
Um. One is hung above your head on telephone poles and the other is ran underground in conduit? Unless you meant something else? Also burying cable costs ~10 times as much for transmission lines as overhead. It also usually has a lower power carrying capability, since it cannot dissipate heat as readily as an overhead conductor.
When electricity is transported long distances via large overhead transmission lines the voltage can be transformed up to volts. A. 250000 B. 500000 C. 10000 D. 100000?
When electricity is transported long distances via large overhead transmission lines, the voltage can be transformed up to 500,000 volts (B). This high voltage reduces energy loss during transmission, allowing for efficient delivery of electricity over long distances.
What is the purpose of having a low impedance for transmission lines?
in order to reduce the transmission line losses we need low impedance...Low impedance also improves power transfer capacity of the line..
What is the purpose of ground wires in overhead transmission lines?
connection of the ground of all the transmission lines and used as a communication cable between protection devices
Why overhead transmission lines would be more economical than underground transmission lines in high voltage transmission?
Overhead wires do not require insulation, and it is easier to plant poles than dig miles of trenches.
What is the major material used in constructing transmission lines?
The major material used in the construction of transmission lines is aluminum alloy. Steel is also used to reinforce the lines. No insulation is used for overhead transmission lines.
What has the author Vladimir List written?
Vladimir List has written: 'Mechanical design of overhead transmission lines'
What are the balls on high voltage transmission lines?
The balls on overhead conductors are, belive it or not to make them visable to birds, helecoptors and planes etc, so they wont fly in to them. They have no electrical purpose what so ever, Sorry to sat its that simple!! Colin
Advantages and disadvantages of underground and overhead cables?
Overhead transmission lines are less expensive, in most cases, significantly less expensive, than underground cables. Underground transmission cables require insulation, cooling systems, and -the most expensive feature- excavation!
Where does electricity go after it goes to the wooden overhead lines?
Overhead distribution lines are made of aluminium not wood.
What is the purpose of insulator in overhead transmission line?
Overhead lines are uninsulated, as they depend upon the air to provide insulation. However, they must still be insulated from the towers or poles from which they are suspended. This insulation is provided using glass or ceramic insulators. The greater the line voltage, the longer the ceramic insulator, or the greater the number of glass insulator 'dishes'.
What is the difference between overhead transmission line and under ground transmission line?
Um. One is hung above your head on telephone poles and the other is ran underground in conduit? Unless you meant something else? Also burying cable costs ~10 times as much for transmission lines as overhead. It also usually has a lower power carrying capability, since it cannot dissipate heat as readily as an overhead conductor.
When electricity is transported long distances via large overhead transmission lines the voltage can be transformed up to volts. A. 250000 B. 500000 C. 10000 D. 100000?
When electricity is transported long distances via large overhead transmission lines, the voltage can be transformed up to 500,000 volts (B). This high voltage reduces energy loss during transmission, allowing for efficient delivery of electricity over long distances.
Are pylons electric at the bottom?
No, pylons (or transmission towers) are not electric at the bottom. The electricity is carried through the overhead power lines that are attached to the pylons. The pylons are designed to support the power lines and keep them elevated above the ground.
What has the author D H Arner written?
D H Arner has written: 'Transmission line rights-of-way management' -- subject(s): Electric lines, Environmental aspects, Environmental aspects of Electric lines, Overhead electric lines, Right of way
