An overhead line may be used to or distribute electrictransfer power. The covering on an overhead power line is primarily for weather protection. But due to sag it requires more conductor material. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Ppt overhead line insulators powerpoint presentation free. Download fault location of overhead trasmision line seminar reports, ppt, pdf, fault location of overhead trasmision line seminar topics, abstracts, full documentation, source code. Whether it is training for power system engineers, commissioning engineers, control room. W elcome to free powerpoint templates design, one of the most usefull powerpoint templates resource website. Construction maintenance and repair live line barehand annotated instructors guide module overview this module introduces trainees to tasks in the power transmission environment that are often conducted while lines and components are live, performed with intentional contact between the worker and the energy source. Transmission lines powerpoint templates w transmission. Advantages of overhead transmission lines cheaper to install and maintain than underground cables. Electrical transmission system is the means of transmitting power from generating station to different load centres. Electrical design of overhead power transmission lines.
Anatomy of a transmission line overhead transmission line components conductor alternatives typically aluminum or copper conductors are used. Short transmission lines the transmission lines are categorized as three types 1 short transmission line the line length is up to 80 km 2 medium transmission line the line length is between 80km to 160 km 3 long transmission line the line length is more than 160 km. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. The most common methods for transfer of electric power are. Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The installation of underground transmission lines costs more per foot than most overhead lines. Dont miss this unbeatable value for powerpoint templates, and animations. Overhead transmission an overhead power line is an electric power transmission line suspended by towers or utility pole s. Sunrise powerlink steel cap micropile foundation patent pending in this respect, there is a major difference between the design of foundations for transmission lines compared to the design of foundations for most normal civil engineering structures accordingly, the amount of literature describing design techniques for overhead line foundations is relatively small compared to the literature.
This template could be used for presentations on power, industry, electricity, the environment or sustainable power. They need to understand how the physical components of transmission lines fit into an integrated design. The quarter wave line provides impedance transformation upto the highest frequency at which the transmission lines are used. For a limited time, our one year and two year subscriptions are on sale. Assume the impedance of the line is 50 ohm, phase constant is 20 radm and the operating frequency is 700mhz. The proper overhead line operation depends to a big extent upon its mechanical design. Overhead line is designed on the principle of one or more overhead wires situated over rail tracks. Personal protective grounding of overhead transmission lines standard number.
Feb 26, 2003 overhead power lines presents not only the scientific and engineering basis for the electric and mechanical design, but also comprehensively describes all aspects of most recent technology, including the selection and design of components such as conductors, insulators, fittings, supports and foundations. Ensure adequate transmission from resources to serve loads in a reliable and economical manner. Td703 revision 6 temporary protective grounds for td. Subscribe to envato elements for unlimited stock video downloads for a single monthly fee. Download overhead power lines stock video by abeautifulworld. Cowritten by experts in power engineering, this detailed guide addresses component selection and design, current ieee standards, loadflow analysis, power. Hon tat hui transmission lines basic theories nusece ee2011 28 example 1 a 100. Electrical transmission line by dhananjay jha, engineer e, sjvn 2. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Dams for construction, operation, and maintenance of the transmission line and access roads. Best powerpoint templates download your favorites today.
Free color art powerpoint template is a simple colorful design that seems suitable for the presentations on holi festival, multipurpose topics like business, colorful celebration events, art, and much other fashionrelated presentations can have it. Ppt overhead line insulators powerpoint presentation. Sep 03, 2012 complete coverage of power line design and implementation this text provides the essential fundamentals of transmission line design. Overhead power lines electrical tower hazard lock out switch ppt. Engineers need an overview of the important aspects contemporary applications of transmission lines. Mechanical design of overhead lines ced engineering. For keeping the cost minimum, sag also must be kept minimum but if sag is too low then wire gets subjected to an extra tension. Isolation workers can use the isolation method when working on lines and equipment by first grounding the lines and equipment using an approved method, then removing the. Our powerful online video maker is included in our subscrption. Since the spacing between lines in buried cables is very small, shunt capacitance of cables is much larger than the capacitance of overhead.
Electra is a powerful overhead power line cad design software which combines design and documentation production workflows for electrical distribution design. Feeder stations at regular intervals along the overhead line supply power from the highvoltage grid. Complete coverage of power line design and implementation this text provides the essential fundamentals of transmission line design. In the 1920s rwe ag built the first overhead line for this voltage and in 1926. Kshetrimayum 52020 but, we can still employ lump element analysis of transmission lines by. Power lines powerpoint template presentation magazine. Ppt transmission lines powerpoint presentation free to. The inductive reactance at 60 hz for overhead lines is typically much larger than the resistance of the line. An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across large distances. Refer to the microstrip transmission line applet and design a 33 ohm microstrip. Fatalities are possible as electrocution is the main risk. Transmission lines powerpoint template, backgrounds.
Maintenance of overhead electric supply and communication lines part 3 safety rules for the installation and maintenance of underground electric supply and communication lines part 4 work rules for the operation of electric supply and communications lines and equipment appendix a uniform system of clearances. Home technical articles design of overhead transmission line foundation tower foundation the foundation is the name given to the system which transfers to the ground the various steady state dead and variable live loads developed by the transmission tower and conductors. The usfs and blm will also authorize timber sale contracts to allow for the purchase and clearing of timber for this project. The design and construction of underground transmission lines differ from overhead lines because of two significant technical challenges that need to be overcome. Transmission lines with both ac and dc voltages are being used though ac transmission lines are dominant. Transmission lines a transmission line connects a generator to a load a two port network transmission lines include physical construction. In the context of this guideline, iusas generally consist of an overhead line or underground cable, or a hybrid. Power transmission lines great powerpoint clipart for.
It is a good blend of fundamental theory with practical design guidelines for overhead transmission lines, providing the basic groundwork for students as well as practicing power engineers, with material generally not found in one convenient book. Transmission line models fortunately, certain simplifications can be used. Short transmission lines line voltage is less than 20kv length of transmission line is upto about 50km capacitance effect are small or negligible 6. Download fault location of overhead trasmision line. Costs of underground construction can range from four to ten times as much as an equivalent length of overhead line. Great powerpoint template for presentations on electricity distribution, overhead. Treat all power lines as energized until confirmed by a utility employee they are deenergized. Transmission line construction company teems india towerlines teems india towerlines private limited is a specialized high voltage transmission line construction, installation, erection and stringing, maintenance and gis based company in chennai, india. Since the phases of a highvoltage overhead transmission line must be spaced further apart to ensure proper insulation, a highvoltage line will have a lower capacitance than a lowvoltage line. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Transmission lines high level electrical design criteria guideline current version.
Route surveys for overhead electrical distribution and. Analysis of a transmission lines must be carried out using the concept of distributed elements not as lumped elements as we used to do from our previous circuit analysis at the low frequencies 14 electromagnetic field theory by r. Overhead electric power transmission allows distant energy sources such as hydroelectric power plants to be connected to consumers in. This english text is to be regarded as a translation of the swedish. Ptec 500 fundamentals of overhead transmission line design. The arrangement of the parameters equivalent circuit model representing the line depends upon the length of the line. The purpose of the guideline is to guarantee satisfactory performance of the vibration dampers during the lifetime of the overhead transmission line and shall be used for the purchase of vibra tion dampers. Pay once and download as many of our powerpoint templates, animations and clipart images as you need. Know the possible transmission fluid leak spots in a car the transmission fluid is an important component for the shifting of gears as well as the steering wheel.
Electric power research institute epri downloads 1 introduction i received the following information from doug dorr. Hon tat hui transmission lines basic theories nusece ee2011 1 transmission lines basic theories 1 introduction at high frequencies, the wavelength is much smaller than the circuit size, resulting in different phases at different. Transmission powerpoint templates and transmission powerpoint backgrounds. On the other hand, a power transmission line or other utility running through open country on a large military installation may require reconnaissance and preliminary surveys in addition to the finallocation survey. Transmission line presentation electric power transmission. Voltages of overhead lines range from 120 to 750,000 volts. Exercise caution when working near overhead lines that have long spans between poles. Transmission lines high level electrical design criteria. A transmission line is a twoport network connecting a generator circuit at the sending end to a load at the. In overhead transmission lines, the currentcarrying capacity is determined mostly by the conductor resistance and the heat dissipated from its surface 8. Westerns substations and transmission lines are under the jurisdiction of westerns power operation and maintenance staff and are subject to their standard operating procedures and regulations. Overhead transmission structures the basic overhead transmission line structure.
Download fault location of overhead trasmision line seminar. The interconnected lines which facilitate this movement are known as a transmission network. Do not locate access roads or ramps near, underneath power lines. Ppt eht overhead transmission lines powerpoint view and download powerpoint presentations on eht overhead transmission. Handbook for improving overhead transmission line lightning performance. Overhead power lines by abeautifulworld on envato elements. Since most of the insulation is provided by air, overhead power lines are generally the lowestcost method of transmission for large quantities of electric energy.
Overhead and buried power lines are especially hazardous because they carry extremely high voltage. The heat generated in a conductor joules effect is dissipated from its surface area by convection and radiation given by i2r. Electrical design of overhead power transmission lines discusses everything electrical engineering students and practicing engineers need to know to effectively design overhead power lines. The most reliable way to know the voltage is to ask the utility company that owns the line. Assume we have a transmission line in which air separated the two perfect conductors. Construction maintenance and repair liveline barehand. Feb 22, 2017 mechanical design of overhead transmission lines transmission lines are designed primarily on the basis of economy point of view. The transmission lines are categorized as three types 1 short transmission line the line length is up to 80 km 2 medium transmission line the line length is between 80km to 160 km 3 long transmission line the line length is more than 160 km whatever may be the category of transmission line, the main aim is to transmit power from. Power is transmitted at high voltages in order to reduce power loss during transmission.
Provisions will be made to deenergize only those buses and circuits necessary to accomplish the work. Scope this work practice covers the use of personal protective grounds on the seattle city light scl 115 and 230 kv overhead transmission systems. However, generalized cost ratios of underground to overhead options should not be used because costs are sitespecific. It consists of one or more conductors commonly multiples of three suspended by towers or poles. Construction of transmission and distribution lines. We provide you a fantastic collection of free powerpoint templates design that you can download for free and regulate for your personal presentations. While constructing an overhead line, it has to be verified that line mechanical strength is such so as to provideagainst the most probable weather conditions. Pdf calculation of overhead transmission line impedances a. Overhead transmission lines shorter than 80 km 50 miles can be modeled as a series resistance and inductance, since the shunt capacitance can be neglected over short distances. Download free powerpoint themes and powerpoint backgrounds for your presentations. The guidelines intend to guarantee satisfactory performance of insulators during the lifetime of the overhead line and shall be used at purchasing of insulators. For safety purpose, the ground clearance of the conductors at maximum temperature and minimum loading condition should be maintained. Transmission lines powerpoint template, backgrounds 06482. The transmission line is a twoport circuit used to connect a generator or transmitter signal to a receiving load over a distance.
And we are the international transmission line contractors for gis data capturing, mapping, supply and installation on turnkey. Indeed, it is one of the major concerns in planning and constructing overhead power transmission lines and telegraph lines in cold climate regions experiencing ice accretion 6 7. Calculation of overhead transmission line impedances a finiteelement approach article pdf available in ieee transactions on power delivery 141. Since most of the insulation is provided by air, overhead power lines are generally the lowestcost method of power transmission for large quantities of. Transmission line parameters i n this chapter, we discuss the four basic transmissionline parameters. This may be from the standpoint of due diligence when requesting regulatory approval for an overhead line or as part of a hybrid line where a portion of an otherwise overhead circuit must be. Electrical and mechanical design criteria for ehv and uhv. An introduction to electric power transmission presentation. These individuals require an understanding of the theory and practice of overhead lines in planning, design, construction, operation, and maintenance. You can use this design as the title slide design or the background of the presentation on colors. It is required to regularly check the transmission cooler lines, dipstick tube oring, transmission input and output shaft seal in order to avoid fluid leaks.
Transmission lines powerpoint templates w transmission lines. Use this icon template for hazard and safety related presentations. Two parallel wires coaxial cable microstrip line optical fiber waveguide very high frequencies, very low loss, expensive etc. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Overhead lines or overhead wires are used to transmit electrical energy to trams, trolleybuses or trains. Primary clearing will occur within the transmission line and access road rows and some danger trees removed outside the row. Free color art powerpoint template free powerpoint templates. Great powerpoint template for presentations on electricity distribution, overhead power lines, electricity market, energy resources, etc. Here is a template showing overhead power lines against a perfectly blue sky. For discussion purposes, lets consider route surveys for overhead electrical lines. Preamble transmission lines are needed when bulk power has to be transmitted over long distances. Aluminum is preferred over copper for its lower cost and lighter weight, however, this comes at the price of some energy loss that doesnt occur with copper. Ppt ehtoverheadtransmissionlines powerpoint view and download powerpoint presentations on eht overhead transmission. Underground transmission in the united states presently accounts for less than 1% of total transmission, and is found mostly in large cities or under.
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