Full Answer
What are the parts of a power triangle?
Apr 20, 2020 · What are the metal triangles hanging on power lines? They stabilize the lines in high wind preventing them from swinging too close to each other or "bouncing" and working loose from the insulators. Click to see full answer .
What is the power factor in the power triangle?
Nov 11, 2007 · Yes, these are anti-galloping/vibration devices. They also come shaped like basketballs, and a "sideways H" design. Old ones often were simply a bucket full of cement hanging below the wire. They are only placed where local conditions have caused a problem; that's why they are irregularly placed. Upvote # 8 11-11-07, 12:31 PM T twelvepole Member
How do you find the power triangle in a circuit diagram?
Metal triangles on power lines We often see a few triangular loops hanging from the power lines. These are used to provide stability to the lines in high wind. These triangular fins prevent the lines from bouncing too close to each other and ensure that they are not loosened from the insulators.
How do you find reactive power from phasor triangle?
What are the metal triangles hanging on power lines? They stabilize the lines in high wind preventing them from swinging too close to each other or "bouncing" and working loose from the insulators. What are the loops on power lines? The loops allow the wire to uncoil or "stretch" rather than break.
What are the triangle metal things on power lines?
They're called visibility marker balls or marker balls. You'll often find them near mountain passes, in the deep valley areas, near major freeway crossings and around airports. They weight about 17 pounds each. The marker balls are placed on power lines to make the conductor crossings visible to aircraft.Jan 27, 2017
What are those things hanging from power lines?
Marker balls are colorful, spherical markers placed on power lines for the safety of low flying aircraft and to protect the electrical infrastructure. They allow the electrical wires to be noticeable (especially during times of low visibility or inclement weather) thanks to their bold colors.May 28, 2021
Why are there triangles on power lines?
They stabilize the lines in high wind preventing them from swinging too close to each other or "bouncing" and working loose from the insulators. Click to see full answer.Apr 20, 2020
Why are there weights hanging on power lines?
The white blobs are the weights. Here is a closeup of a single weight: They appear to be just concrete blocks with no dashpot or any other apparent way to dissipate power. These weights seem to be at 1/4 and 3/4 of each span, which would be the nodes of the first harmonic standing wave.Aug 22, 2016
How do linemen not get electrocuted?
A live line worker is electrically protected by insulating gloves and other insulating equipment, and carries out the work in direct mechanical contact with live parts. The barehanded approach has a live line worker performing the work in direct electric contact with live parts.
Why do squirrels not get electrocuted on power lines?
When squirrels walk on power lines, electricity would not travel from one end of the wire to the other faster by traveling through the squirrel, so the electricity and squirrel both continue on their paths.Jan 21, 2019
What are the orange cones on power lines?
The main purpose of the marker balls is so that helicopters and low-flying planes don't hit electrical wires. They are an extra precaution since anything that flies isn't supposed to fly lower than the electrical towers.Aug 12, 2019
Why do birds not get electrocuted on power lines?
The copper in electrical wires is a great conductor. Birds are not good conductors. That's one reason they don't get shocked when they sit on electrical wires. The energy bypasses the birds and keeps flowing along the wire instead.
What's a red ball on a powerline mean?
VisibilityVisibility. The large red balls that sit on power lines in the middle of the country are primarily meant to help airline pilots see the lines to avoid running into them. The balls are often found on the power lines surrounding smaller airports in open country.Oct 18, 2017
What does a red ball on a power line mean?
Aerial marker Balls are used for safety. It saves lives and infrastructure by making guy wire and power lines (Transmission, distribution and communication lines) visible to the low flying helicopters, aircraft and plans according to the Federal Aviation Administration(FFA ).
True power triangle
Active or true power refers to the entire amount of power dissipated in an electrical circuit. It is measured in Watt (W) or KiloWatt (KW) and represented with P and average value of the active power P is,
Reactive power triangle
Reactive power or imaginary power is the power that doesn’t do any real work and causes zero power dissipation. Itt is also known as watt-less power. This is the power derived from reactive elements like the inductive load and the capacitive load. The reactive power is calculated in Kilovolt Amp reactive (KVAR) and is denoted by Q.
Apparent power triangle
The total power in the circuit, both absorbed and dissipated, is known as apparent power. The apparent power is computed by multiplying the r.m.s voltage with r.m.s current without any phase angle quantity.
Power triangle for capacitive load
A capacitive load means that the power factor is leading as the current lead the voltage by the phase angle.
Power triangle for inductive load
An inductive load represent that the power factor is lagging because the I lags V by the phase angle.
Complex power triangle
Complex power is nothing but the representation of power using complex numbers. The real part represent the active power. Imaginary part represent the reactive power.
Three-phase power triangle
Alternating current can be single-phase or three-phase. The variation of current amplitude results in the generation of sine waves. For a single-phase supply, there’s just one wave. Three-phase systems split the current into three parts. The three current components are out-of-phase by one-third of a cycle each.
How many wires are needed for a three phase circuit?
Three-phase distribution requires four wires, one for each phase and a neutral. If you see three wires on a crossarm and one wire on the pole in the supply space, you’ll know you’re looking at a three-phase circuit. Poles in some rural areas like mine don’t have crossarms and only have a single conductor on an insulator at the very top ...
What is cutout in electrical?
Cutouts are easy to spot – they’re wide insulators with a light-colored tube running between contacts. The tube contains a fuse with an explosive charge that kicks the cutout open quickly and dramatically.
What is bare wire?
The bare wire serves as both neutral conductor and physically supports the two 120 volt conductors. Commercial customers often benefit from three-phase service, in which case you might see three transformers mounted on a pole, one for each phase.
What is joint pole?
Spaces on a typical joint pole. Source: Florida Public Service Commission. Very few utility poles are used for just one utility. Poles that house multiple services, like power, telephone, and cable, are called joint poles and are covered by strict safety rules that separate the utilities spatially. In general, the most dangerous things on ...
