Best powerpoint templates download your favorites today. Great powerpoint template for presentations on electricity distribution, overhead. The usfs and blm will also authorize timber sale contracts to allow for the purchase and clearing of timber for this project. Pdf calculation of overhead transmission line impedances a. Our powerful online video maker is included in our subscrption. This template could be used for presentations on power, industry, electricity, the environment or sustainable power. 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. Exercise caution when working near overhead lines that have long spans between poles. Great powerpoint template for presentations on electricity distribution, overhead power lines, electricity market, energy resources, etc. 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. Electrical and mechanical design criteria for ehv and uhv. The covering on an overhead power line is primarily for weather protection. A transmission line is a twoport network connecting a generator circuit at the sending end to a load at the. Power is transmitted at high voltages in order to reduce power loss during transmission.
Transmission lines a transmission line connects a generator to a load a two port network transmission lines include physical construction. Fatalities are possible as electrocution is the main risk. Short transmission lines line voltage is less than 20kv length of transmission line is upto about 50km capacitance effect are small or negligible 6. An overhead power line is an electric power transmission line suspended by towers or utility poles. An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across large distances. Anatomy of a transmission line overhead transmission line components conductor alternatives typically aluminum or copper conductors are used.
Advantages of overhead transmission lines cheaper to install and maintain than underground cables. Voltages of overhead lines range from 120 to 750,000 volts. Transmission powerpoint templates and transmission powerpoint backgrounds. 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. 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. 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. 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.
Cowritten by experts in power engineering, this detailed guide addresses component selection and design, current ieee standards, loadflow analysis, power. Power lines powerpoint template presentation magazine. However, generalized cost ratios of underground to overhead options should not be used because costs are sitespecific. In the context of this guideline, iusas generally consist of an overhead line or underground cable, or a hybrid. 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. 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. Free color art powerpoint template free powerpoint templates. Overhead line is designed on the principle of one or more overhead wires situated over rail tracks. The inductive reactance at 60 hz for overhead lines is typically much larger than the resistance of the line. They need to understand how the physical components of transmission lines fit into an integrated design. Two parallel wires coaxial cable microstrip line optical fiber waveguide very high frequencies, very low loss, expensive etc. Electrical transmission system is the means of transmitting power from generating station to different load centres. Here is a template showing overhead power lines against a perfectly blue sky.
The proper overhead line operation depends to a big extent upon its mechanical design. Transmission lines high level electrical design criteria guideline current version. 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. Hon tat hui transmission lines basic theories nusece ee2011 28 example 1 a 100. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Electric power research institute epri downloads 1 introduction i received the following information from doug dorr.
Download fault location of overhead trasmision line seminar reports, ppt, pdf, fault location of overhead trasmision line seminar topics, abstracts, full documentation, source code. Overhead power lines by abeautifulworld on envato elements. Ppt overhead line insulators powerpoint presentation. Dont miss this unbeatable value for powerpoint templates, and animations. 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 fault location of overhead trasmision line seminar. Ppt transmission lines powerpoint presentation free to.
The installation of underground transmission lines costs more per foot than most overhead lines. Mechanical design of overhead lines ced engineering. 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. 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. These individuals require an understanding of the theory and practice of overhead lines in planning, design, construction, operation, and maintenance. Provisions will be made to deenergize only those buses and circuits necessary to accomplish the work. But due to sag it requires more conductor material. Sep 03, 2012 complete coverage of power line design and implementation this text provides the essential fundamentals of transmission line design. Electrical transmission line by dhananjay jha, engineer e, sjvn 2. Ppt overhead line insulators powerpoint presentation free.
The arrangement of the parameters equivalent circuit model representing the line depends upon the length of the line. 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. Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. Td703 revision 6 temporary protective grounds for td. The most common methods for transfer of electric power are. Preamble transmission lines are needed when bulk power has to be transmitted over long distances. The quarter wave line provides impedance transformation upto the highest frequency at which the transmission lines are used. Do not locate access roads or ramps near, underneath power lines. 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. Transmission lines powerpoint template, backgrounds. Kshetrimayum 52020 but, we can still employ lump element analysis of transmission lines by. Underground transmission in the united states presently accounts for less than 1% of total transmission, and is found mostly in large cities or under. Subscribe to envato elements for unlimited stock video downloads for a single monthly fee.
Construction maintenance and repair liveline barehand. We provide you a fantastic collection of free powerpoint templates design that you can download for free and regulate for your personal presentations. Assume the impedance of the line is 50 ohm, phase constant is 20 radm and the operating frequency is 700mhz. Complete coverage of power line design and implementation this text provides the essential fundamentals of transmission line design. 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. And we are the international transmission line contractors for gis data capturing, mapping, supply and installation on turnkey. Treat all power lines as energized until confirmed by a utility employee they are deenergized. The transmission line is a twoport circuit used to connect a generator or transmitter signal to a receiving load over a distance. Pay once and download as many of our powerpoint templates, animations and clipart images as you need.
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. An overhead line may be used to or distribute electrictransfer power. Transmission lines with both ac and dc voltages are being used though ac transmission lines are dominant. Calculation of overhead transmission line impedances a finiteelement approach article pdf available in ieee transactions on power delivery 141. Winner of the standing ovation award for best powerpoint templates from presentations magazine. There are no additional fees or limits to the number or type of videos you can make with slideclips. Overhead electric power transmission allows distant energy sources such as hydroelectric power plants to be connected to consumers in. Transmission line models fortunately, certain simplifications can be used. Feb 22, 2017 mechanical design of overhead transmission lines transmission lines are designed primarily on the basis of economy point of view. Ptec 500 fundamentals of overhead transmission line design. Download free electricity powerpoint templates and slide designs with creative diagrams for electricians and professionals. Handbook for improving overhead transmission line lightning performance. Overhead power lines electrical tower hazard lock out switch ppt. The design and construction of underground transmission lines differ from overhead lines because of two significant technical challenges that need to be overcome.
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. The guidelines intend to guarantee satisfactory performance of insulators during the lifetime of the overhead line and shall be used at purchasing of insulators. Costs of underground construction can range from four to ten times as much as an equivalent length of overhead line. Ensure adequate transmission from resources to serve loads in a reliable and economical manner. For a limited time, our one year and two year subscriptions are on sale. Transmission lines powerpoint templates w transmission lines. Electrical design of overhead power transmission lines discusses everything electrical engineering students and practicing engineers need to know to effectively design overhead power lines.
Electra is a powerful overhead power line cad design software which combines design and documentation production workflows for electrical distribution design. 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. Transmission line presentation electric power transmission. 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. In the 1920s rwe ag built the first overhead line for this voltage and in 1926. Power transmission lines great powerpoint clipart for. 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. The heat generated in a conductor joules effect is dissipated from its surface area by convection and radiation given by i2r.
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. Electrical design of overhead power transmission lines. For safety purpose, the ground clearance of the conductors at maximum temperature and minimum loading condition should be maintained. Download overhead power lines stock video by abeautifulworld. Download fault location of overhead trasmision line. Personal protective grounding of overhead transmission lines standard number.
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. Transmission lines powerpoint templates w transmission. This english text is to be regarded as a translation of the swedish. Transmission lines high level electrical design criteria. Whether it is training for power system engineers, commissioning engineers, control room. Primary clearing will occur within the transmission line and access road rows and some danger trees removed outside the row. For discussion purposes, lets consider route surveys for overhead electrical lines. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Assume we have a transmission line in which air separated the two perfect conductors. Ppt eht overhead transmission lines powerpoint view and download powerpoint presentations on eht overhead transmission. Use this icon template for hazard and safety related presentations. You can use this design as the title slide design or the background of the presentation on colors.
Feeder stations at regular intervals along the overhead line supply power from the highvoltage grid. Refer to the microstrip transmission line applet and design a 33 ohm microstrip. 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. Overhead and buried power lines are especially hazardous because they carry extremely high voltage. An introduction to electric power transmission presentation. Ppt ehtoverheadtransmissionlines powerpoint view and download powerpoint presentations on eht overhead transmission. Calculate the line inductancemeter and capacitance meter. Discovering and getting the most related and suitable powerpoint templates are as simple as few clicks. 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. The most reliable way to know the voltage is to ask the utility company that owns the line. Transmission line parameters i n this chapter, we discuss the four basic transmissionline parameters. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect.
The interconnected lines which facilitate this movement are known as a transmission network. In overhead transmission lines, the currentcarrying capacity is determined mostly by the conductor resistance and the heat dissipated from its surface 8. 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. W elcome to free powerpoint templates design, one of the most usefull powerpoint templates resource website. 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. Transmission lines powerpoint template, backgrounds 06482.
Scope this work practice covers the use of personal protective grounds on the seattle city light scl 115 and 230 kv overhead transmission systems. Dams for construction, operation, and maintenance of the transmission line and access roads. It consists of one or more conductors commonly multiples of three suspended by towers or poles. Overhead transmission an overhead power line is an electric power transmission line suspended by towers or utility pole s. Overhead transmission structures the basic overhead transmission line structure. Route surveys for overhead electrical distribution and. Download free powerpoint themes and powerpoint backgrounds for your presentations. Sendingend port a a b b transmission line generator.
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