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Why do high tension transmission wires carry electricity at high voltages?
Wiki User
∙ 12y ago
For a given load, the higher the supply voltage, the lower the resulting load current. So, using high voltages reduce the load current which, in turn:
- minimise voltage drop along the line (which, at low voltages, would otherwise be enormous, rendering transmission of energy impossible).
- enable conductors of practical size.
- reduce line losses.
Wiki User
∙ 12y ago
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How does electricity get to a plug?
The electricity is produced by large generators in a power plant.Transformers in the power plant yard step up the voltage to more than half a million volts used by the power transmission lines.Power transmission lines carry the electricity over long distances between the power plants and cities.Transformers in a switching yard step the voltage down to 1000 to 5000 volts used by power distribution lines.Power distribution lines carry the electricity short distances between the switching yard and the customer locations.Service drop transformers on the pole or underground step the voltage down to the voltage needed by the customer (e.g. 220 volts center taped for household, 240 volt 3 phase for commercial, 480 volt 3 phase for industrial).Service drop lines carry the electricity from the service drop transformer to the customer's electric meter.Internal main wiring carries the electricity from the electric meter to the breaker box.Wires from the breakers in the breaker box to outlets carry the electricity to the outlet sockets.When you put a plug in an outlet socket, the plug gets electricity.
What method of signal transmission uses radio waves to carry signals?
The analog method of signal transmission uses radio waves to carry signals. Digital transmission involves the use of satellites to transmit signals.
What is the distribution voltage in electricity transmission?
Every conductor (in this case, the transmission line) has a finite resistance. so for example let us say it has a resistance of 1 ohm over a distance of 1 km. then, if the current through the conductor is say 100 Amperes, you will have a voltage drop of 100 volts across a length of 1 km. So, a line carrying 100 Amps at 25 kV will have an effective voltage of 24.9 kV
Why are transformers needed in the national grid?
They step down the voltage from the main power generating stations at different intervals so that for a domestic power service it is delivered at 240V.Additional answerWhen you pass electricity through wires you warm the wires up. This heat is a total loss of energy. So you want to keep the loss to a minimum. The heating effect of electricity is increased with an increase in amperage (the current). The amount of power that goes through the wires is a function of the voltage x amps. So to transmit a certain amount of power with the minimum heat loss you keep the current down which mean pushing the voltage up. This is why the transmission wires near the generating station carry very high volatges. But these voltages are unsafe for use in domestic circuits so they have to be reduced by a series of transformers from the high voltages in the main lines to lower voltages at substations to even lower voltages in the home.For more information see the answers to the Related questions shown below.
How does electricity pass through lead?
The same as it does in any metal. Metals have a number of electrons that can move about freely; these carry the current.
What are electrical transmission towers for?
Electrical transmission towers are meant to hold the power lines and to carry electricity.
What is transmission line amps rating?
High power transmission lines carry several hundred amperes up to 2000 amps at voltages up to 500 kV or higher
What is the word which means 'conductor carrying electricity over large distance with minimum losses' - clue it wl have a 'miss' syllable in it?
Transmission lines are used to carry electricity.
Can you get an electric shock through the air?
yes, it's called lightning also in the case of high voltages the general rule of clearance is 1 foot for every 1000 volts. so those high tension towers you see can carry in excess of 13200 volts so if you get any closer than 14 feet the electricity could jump to you.
Information or data is transmitted in digital computers by voltages that are switched on or off?
voltages must be on before data information can be transmitted in digital computers and not so when using the internet, because the message is transmitted at the slightest glimpse of power source. does not need proper voltage to carry out transmission
What is a sentence with tension?
Relax, you carry so much tension in your shoulders.
What materials will not carry or conduct electricity?
Insulator materials will not carry or conduct electricity.
What do you call a material that can carry electricity?
An electrical conductor is a material that can carry electricity.
How much voltage is used by electrical device?
minimum 230volts In formal electrical jargon, a "device" does not "use" electricity. A device is something like a switch or receptacle(outlet) that helps control or carry electricity but does not consume electricity. In the United States, voltage for home lighting and general purpose receptacles is 120v. Voltage for electrical appliances such as ranges, clothes dryers, or furnaces is 240v. Voltages such as 110v, 115v, or 125v are versions of 120v in electrical jargon and voltages such as 220v or 230v are versions of 240v.
How much electricity does a pylon Carrie?
In the UK a line of pylons carrying the supergrid at 400 kilovolts can carry up to about 2000 Megawatts. Pylons also carry circuits working at lower voltages, 275 and 132 kV, 66 kV in some places, and on small pylons 33 kV.
What does high-tension liones carry?
a machine gun!
What is the function of wires in transmission line?
Each of the three conductors of an electricity transmission system are termed 'line conductors', and there is a potential difference between each pair, called a 'line voltage'. The conductors themselves carry load currents called 'line currents'.
