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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
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoA metropolitan area is served by 69-kV and 138-kV networks, both feeding multiple distribution substations. A 230-kV network is also present, which feeds selected points within the 138-kV network. There are a couple of 500-kV nodes nearby that supply bulk-power from an interstate regional power pool. In this example, both the 69-kV and 13.8-kV systems are sub-transmission, while the infrastructure operating at 230 kV and 500 kV is considered to be transmission. A largely rural area is served with a 230-kV network, in which cities and towns have 230-kV high-voltage distribution substations. There is also a 69-kV network to feed some of the smaller substations in outlying areas. The 230-kV network is the transmission network while the 69-kV network represents a sub-transmission system. These substations may also include transformers connecting higher-voltage transmission with a lower-voltage sub-transmission network. The distribution system provides the delivery network to individual homes and businesses. Common distribution voltages include 12.5 kV, 13.2kV.
For most of the regulated history of electric utilities, the voltages used in the distribution delivery systems were allowed to vary within defined limits, mostly plus or minus 5%. As systems operated constantly at the upper 5% limit, these limits became the new nominal operating level. Therefore, 7.2/12.47-kV systems became 7.6/13.2-kV systems, which then evolved to 7.9/13.8-kV systems. In addition, the 7.2/12.47-kV system was doubled to provide the 14.4/25-kV system often used by the aforementioned REA delivery systems serving remote, sparsely populated areas. The desire for even higher distribution primary delivery voltages required an evolution of the transmission voltages used in the early years of electric system development. The 11-kV delta lines were upgraded, again by a factor of three, to 33 kV. As these were consistently operated at a 5% operating level, to reduce losses and offset voltage drop on the lines, a new nominal level of 34.5 kV was established.
Power transmission lines by their nature have to carry power long distances. Since there is a voltage drop involved, the voltage is increased at the source so that the loss in the transmission lines still allow usable power to be delivered at the user location. The higher voltage is reduced by a transformer near your home to the standard 120 to 240 VAC.
Wiki User
∙ 11y agoThere are three levels of nominal voltage used in the electricity supply system -those associated with transmission systems, and those associated with high- and low-voltage distribution systems. The voltages depend on the standards of the countries in which the systems are constructed. For example, in the UK,
- transmission voltages: 400 kV, 275 kV
- h.v. distribution voltages: 132 kV, 66 kV, 33 kV, and 11 kV
- l.v. distribution voltages: 400/230 V
Wiki User
∙ 13y agoWhat do you mean by "Primary Line"? There are typical voltage ranges for transmission, subtransmission, and distribution lines.
Wiki User
∙ 12y agoIt depends on the particular utility. In the area where I live, the distribution voltage is 13.2 KV, phase to phase, or 7.62 KV phase to ground.
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What is service mains in power transmission system?
A 'service mains' is not associated with an electricity 'transmission' system, but with a low-voltage 'distribution' system. The service mains is the name given to the cable that connects a building to the low-voltage mains supply.
Why is high voltage a plus?
its because of transformers . they work with pulse
Which part of the process of distributing electricity changes the voltage of the current?
The transformers step-up and down voltage for transmission and use.
What is a system that links electricity produced in power stations to deliver it to where it is needed?
Power Systems or Transmission & Distribution
What happens at substations?
At substations, the voltage of electricity is either stepped up or stepped down depending on its application. They serve as an intermediate point between the power generation plants and the consumers' electrical distribution system. Substations also provide various protection and control mechanisms to ensure the reliable and efficient transmission and distribution of electricity.
Explain the transmission and distribution of electricity from the generation station to the consumer?
transmission and distribution of electricity are the way of regulate voltage to the minimum rate in which can be benefit to the consumers. From generating station , voltage generated is up 16/25kv which step up upto 330kv this generating voltage now step down in the transmission station through the step down transformer which is 132kv this voltage now transmitting to distribution station where voltage now step down to 33kv, this 33kv now stepdown to 415v for three line and 240/220v for a line for the uses of consumers.
What is the Use of distribution transformer?
A transmission transformer steps the voltage up to a very high value so electricity can travel long distances on transmission lines from the power plant to a city or area with low loss. A distribution transformer steps the high voltage back down to a level that can be used for local distribution and use by businesses and homes.
What is service mains in power transmission system?
A 'service mains' is not associated with an electricity 'transmission' system, but with a low-voltage 'distribution' system. The service mains is the name given to the cable that connects a building to the low-voltage mains supply.
How does electricity get from the power stations to the consumers?
Usually through cables. The power produced by the generator (typically 24KV) is stepped up to the transmission voltage (typically 138KV) using transformers. At various substations, transformers, again, step the transmission voltage down to distribution voltage (typically 13.2KV). There is another step down at the service pole, where a transformer converts the distribution voltage to service voltage (typically 120/240V or 480V three phase).
How do you solve low voltage in electricity problems?
low voltage problem may arise due to unbalancing of distribution transformer in your area. please ask your electricity provider to balance load on distribution transformer.
Describe domestic electricity distribution?
Generation: Electricity is generated at power plants, which can use various energy sources such as coal, natural gas, nuclear, hydroelectric, wind, or solar power. These power plants produce high-voltage electricity. Step-up Transformer: Before distribution, the electricity is typically passed through a step-up transformer to increase its voltage. Higher voltage transmission reduces energy loss during long-distance transportation. Transmission: The high-voltage electricity is transmitted through a network of high-voltage power lines and substations. These power lines can span long distances, carrying electricity from the power plants to regional distribution centers. Step-down Transformer: At substations located closer to residential and commercial areas, the voltage is reduced through step-down transformers. This process lowers the voltage to a level suitable for distribution to homes and businesses. Distribution Lines: Lower-voltage electricity is then distributed through a network of power lines and transformers at the local level. These distribution lines typically consist of overhead wires or underground cables. Distribution Transformers: Near or within residential and commercial areas, distribution transformers further reduce the voltage to levels suitable for household use, typically 120/240 volts in North America or 230 volts in many other parts of the world. Service Lines: From the distribution transformers, electricity is sent through service lines to individual homes and businesses. These service lines connect to the main electrical panel or meter at each building.
Long distance transmission of electricity requires what?
High voltage.
Why is high voltage a plus?
its because of transformers . they work with pulse
Which part of the process of distributing electricity changes the voltage of the current?
The transformers step-up and down voltage for transmission and use.
What is the line voltage of a 230000 kv transmission line?
Transmission and distribution voltages are normally expressed in terms of line voltages, so the answer is that the figure you quote is a line voltage. Incidentally, do you really mean 230 megavolts for a transmission voltage?? And the symbol of kilovolt is 'kV', not 'kv'.
What is the function of transformer 33kv?
A '33-kV transformer' is a three-phase primary-distribution transformer, used in the UK's electricity system to step down the 33-kV primary-distribution voltage to the 11-kV secondary-distribution voltage -the lowest voltage used in the high-voltage distribution system. These transformers are categorised as 'power transformers', and are located in what are termed 'primary substations'.
How is a three phase electricity supplied to a building from the generating plant?
From the Generator Plant electricity is sent out through transmission lines. These lines then lead to different substations where the electricity is sent off to another substation for distribution or repaired (due to losses in the transmission lines). From the distribution substations electricity goes off to service buildings or homes.
