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Why overhead lines are far cheaper than underground cables for long distances and less economical for short distances?
First of all, the overhead lines are cheaper because they are bare, while underground cables are armoured and insulated, hence explaining the higher price. Overhead cables come of course with accessories like poles and insulators (mostly porcelain). For shorter distance, underground cables are preferred as the cost of pole erection does not exist.It's also worth pointing out that the cost of excavating a trench is more expensive than erecting an overhead line, and this cost escalates dramatically with higher voltage systems. For example, a 132-kV double-circuit underground line is between 5 and 8 times the cost of an overhead tower line, whereas an 11-kV single-circuit underground line is up to twice the cost of a wooden-pole overhead line.
What is uncompensated power transmission line?
theriyathu
What factors determine power?
Power = Current * Voltage * Power FactorAbove expression can further be explore as :1. For DC CircuitsPower = Current * Voltage2. For Single Phase AC CircuitPower = Current * Voltage * Power Factor3. For Three Phase AC CircuitPower = Line Current * Line Voltage * Power Factor
What is the efficiency of a transmission line?
Transmission line efficiency is power at the recieving-end of the line compared to the power at the sending-end of the line and is expressed as a percentage, so this can be formulated. % efficiency = load power (output) / source power (input) x 100 In the line, there are power losses. to calculate this we use the formula: power loss = 3.I2.R where I is current and R is resistance. Now that we have the losses, we know the difference between the input and the output. So, for example, if one had the output value known, then to get the input we just add the loss to the output or if had the input known, just subtract the loss from it to get the output. hope that helps
What is surge impedance in power systems?
Actually surge impedance is present in a transmission line due to the capacitance of transmission line. Now this capacitor attends the reactive power of the transmission line to energise its magnetic flux. now due to the flux the impedance will increase and the power is reactive too. due to the impedance loss is more.
What is the purpose of an underground fence?
You may be more familiar with the term "invisible fence." An underground and invisible fence are the same thing. Basically it's a buried wire around your property that communicates with your pet's collar. If they pass over that line they get buzzed and generally stop. An undergrond fence in beneficial in training pets to stay in the yard. The fence is invisible to your neighbors but will emit a slight shock if your pet is too close and attempts to leave the designated area.
What are the dangers from hitting a power line while digging?
When digging it's possible to hit an underground power line. Hitting an underground power line can be very dangerous and is similar to having contact with an overhead line.
“Boundary fence question” if a shed wall is on the boundary line and a fence is built, as close to the shed as possible. Is the fence line after 15 years taken as the new boundary line In adverse possession law (I live in Victoria, Australia.)?
A boundary is a restriction, a line of demarkation. That fence is the boundary between our property. The ball went outside of the boundary.
Can you build underground power lines in simcity 4?
there are no underground power lines but a zone holds it (power) cause the buildings need power so they hold it. and form like a circuit or you call it a underground power line.
What are the underground stations close to Muswell Hill in Haringey England?
The underground stations close to Muswell Hill in Haringey, England are the Underground North Line and Muswell Hill Railway. This railway lasted until the 1950s.
How close can you put a fence to your property line in North Carolina?
It depends on what city you live in or what county you live in. The city has different ordinances then the county. Living in the city of Elizabeth City, NC the fence can be put on the property line but the owners of the fence need to maintain the other side of their fence.
How far from my neighbors property line and from the road can i put a fence?
The fence cannot be outside your property line.
When does a fence become a property lot line?
If the fence is on the legal, surveyed property line, then the line is official immediately.If the fence is not on the legal, surveyed property line, your state's doctrine of mutual acquiescence will determine if and when the fence will become the line. A real estate attorney in your area will be able to tell if you have a legitimate mutual acquiescence claim.
How does a invisible fence work?
there is a cable line underground, and when the animal passes the cable the animals collar is triggered and shocks the pet. I don't know if I'm wrong, but I think that's how it works.
How far from property line can you build a fence in Centralia Illinois?
Typically you are not to build a fence anywhere past your property line.
How bad can a person get shocked from a power line?
10000 volts max. That's only the same as an electric fence. Minor shock.
Is a fence always on the property line?
The centre of the fence posts are in line with the boundary. So the fence attached to the post may be on either side of the boundary line, depending on who owned the fence (especially important if dividing two gardens of semi-detached houses, where one owner may be responsible for the upkeep of the dividing fence - often shown in the deeds).
