Transmission line towers and details by mahesh sontyal 172604 views. It develops sagtension reports as well as stringing charts for a user definable range of span lengths and stringing temperatures. Pdf sagtension calculation program for wood pole overhead. Sag10 etap plscadd appears that sag10 might be the best option. I would like to arrive out the calculation algorithm for sag and tension. Industry preferred pole loading software spidacalc. Spanmaster cable sag and tension calculation software. Utility line design has over twentyfive planned calculations that will be added to the website at no added charge in the coming months. The conductors are attached between two supports with perfect value of sag. Pdf sagtension calculation program for wood pole overhead lines.
Southwire offers sag and tension software sag10 software now gains southwire reliability and expertise. Start with the desired sag, d and calculate t cable for the noniced condition. We generally see a lot of overhead lines on our way. Nov 10, 2017 the sag to tension option allows a user to enter a measured sag value, to calculate a spans tension. May 29, 2015 sag10, the industry standard for sagtension calculation software, is now more powerful than ever. Ocalc pro features an advanced userinterface and calculation tools that make it a highly accurate and productive application for performing comprehensive pole loading analyses for joint use, equipment or line upgrades, system hardening, and pole replacement. Sag10, the industry standard for sagtension calculation software, is now more powerful than ever. Once the nominal tensions and sags are selected, the algorithm is the same as described above. Sag and tension calculation software a new version of southwires sag10 software for calculating sag and tension in overhead conductors is now available with featured enhancements. Structural analysis of power and communication systems is the analysis engine that powers our other software. Sagtension spreadsheet free calculator even elevation. Sag is mandatory in transmission line conductor suspension. Define tension by sag and temperature, generate wire sag charts and detailed tension reports, and ensure compliance with maximum wire tension checks. Mark lancaster, manager of overhead transmission engineering, describes how southwires sag10 software provides.
Sag10 uses the alcoa graphic method and is widely recognized as the industry standard for overhead conductor sagtension calculations. Plscaddultralite is a streamlined version of plscadd for quick modeling of a single span of conductor or wire. A pdf or a csv file can be generated, and the mode can be either sag to tension, or tension to sag. Sag tension calculation program for wood pole overhead lines. Saps can act as a plugin to add finite element sag tension to the standard edition of plscadd. Additional consulting, accident investigation and expert witness services are available in the following areas.
The improved options area allows the user to customize and save software input and output options. I am looking into the purchase of sag tension software. A new version of southwires sag10 software for calculating sag and tension in overhead conductors is now available with featured enhancements. In order to permit safe tension in the conductor, conductors are not fully stretched. A new version of southwires sag10 software for calculating sag and tension in overhead conductors is now available with. Similarly, if the sag is low, then when the line contracts in the winter, low sag will indicate a high tension, and as a result of this contraction, the line may snap. To ensure that no extreme mechanical tensions can occur, which could permanently damage or even brake them. Southwires applications engineer, drew pearson, answers the important questions. Sag and tension calculations for cable and wire spans. Pls caddultralite is a streamlined version of plscadd for quick modeling of a single span of conductor or wire.
Sag and tension calculations for cable and wire spans using catenary formulas abstract. The calculation of conductor at an equal level shown below. No matter what question or concern you have about southwires sag10 software, we can help. Based on this information and data provided by the user, the.
The tension to sag option allows a user to input the initial stringing tension, and have the tool calculate the amount of sag, when the midpoint sag isnt available. The conductor sag should be kept to a minimum in order to reduce the conductor material required and to avoid extra pole height for sufficient clearance above ground level. Plscadd is a complete overhead line design software. With improved user interface, algorithmic logic, and several new features, sag10 v. Technical notes a complete list of technical notes is available on our news page. Industry leading software sag10 software, a play on words for sagten tension, is widely recognized as the industry standard for overhead conductor sagtension calculations, utilizing the alcoa graphic method. Sagtension calculation program for wood pole overhead. Finally, an output format and mode can be selected. In this example we will calculate the sag and tension if the conductor supports are at different elevation. The user should understand first the fundamental concepts of sagtension so that he can appreciate the equations and the result. Plscadds engineering features are unsurpassed giving you the stateoftheart in sagtension, structural analysis and automatic spotting. Reduced root failures as designers push conductors further out in the loading curves, root failures during the sag tension calculation can become a problem. Spanmaster cable sag and tension calculation software commscope.
Spanmaster software takes users through a logical stepbystep process of information entry and produces sag and tension results for any cable span. Sag in general words can be said that distance between the highest point of electric poles or towers and the lowest point of a conductor connected between two poles or towers. The sag to tension option allows a user to enter a measured sag value, to calculate a spans tension. Temperature and wind impacts on sag and tension of aaac overhead transmission line.
Calculate the sag of conductors using matlab file exchange. Sag10 software, a play on words for sagten tension, is widely recognized as the industry standard for overhead conductor sagtension calculations. May 16, 2017 the ocalc pro sag to tension mode for each individual cable affectively works the same as the tension to sag mode, but the user first picks the nominal value for sag and the program calculates the nominal tensions. Sample calculation of sag and tension in transmission line uneven elevation posted by admin in the previous post, we calculated the sag and tension of a transmission line given that the conductors supports are at the same elevation. A novel affine arithmetic aa based transmission line sag, tension and conductor length calculation for parabolic curve is proposed and the proposed method is tested for different test cases. It develops a sagtension report as well as stringing charts for a user definable range of span lengths and stringing temperatures. Southwires sag10 software combines more than 90 years of sagtension calculating experience with over 65 years of conductor. Mark lancaster, manager of overhead transmission engineering, describes how.
Dec 17, 2014 how to use plscaddlite to quickly produce a sag tension report. Hence,sag determines the value of safe working tension and the minimum clearance of the conductor with respect to ground. It develops sag tension reports as well as stringing charts for a user definable range of span lengths and stringing temperatures. Sag10 software support southwire overhead transmission. Sag10 is attractive to engineers due to its ease of use, the speed with which sag and tension calculations can be rendered, and the tremendous value the software brings to. Sagtension calculations predict the behavior of conductors based on recommended tension limits under varying loading conditions. Etap offers software for design and simulation of transmission lines. Calculation of conductor tension, catenary constant, sag, vertical load and axial tension under design load cases calculation of conductor mechanical utilisation, blowout and change in sag at midspan calculation of critical load cases for a range of parameters including sag, tension, conductor utilisation and clearances. Sag and tension chart for multiplex conductors multiplex initial stringing chart conductor gallop analysis sag for specific span along ruling span sag for any distance along level span location of lowest sag for unequal insulator elevations fault current threephase secondary fault current singlephase secondary fault current. As promised, you can download for free my sagtension spreadsheet calculator.
Southwires sag10 software combines more than 90 years of sagtension calculating experience with over 65 years of conductor design and modeling expertise to. Apr 17, 2018 sag is mandatory in transmission line conductor suspension. Plscaddultralite plscaddultralite is a streamlined version of plscadd for quick modeling of a single span of conductor or wire. Pdf temperature and wind impacts on sag and tension of aaac.
If the sag is too large, it may cause a short circuit between the line and objects below it or a short circuit between lines in extremely windy conditions. Southwires sag10 software is a windowsbased, userfriendly application powered by more than 75 years of expertise in sagtension calculations. Catenary calculations and sag tension analysis tools enable users to design, edit and optimize transmission lines accordingly. Hence, sag determines the value of safe working tension and the minimum clearance of the conductor with respect to ground. Sag10 is attractive to engineers due to its ease of use, the speed with which sag and tension calculations can be rendered, and. Electra complies with en 50423321 and en 504231 standards.
Apr 02, 2010 line designers need reliable software for proper calculations of sag and tension. Linedesign engineering pole loading software consulting. S tructural a nalysis of p ower and communication s ystems is the analysis engine that powers our other software. A play on words for sag ten tension, it is widely recognized as the industry standard for overhead conductor sag tension calculations, utilizing the alcoa graphic method. Spanmaster commscopes spanmaster software is a tool designed for use in the calculation of sag and tension of single or multiple cable combinations under various environmental loading conditions. The transmission line tool on mobile tltm ruling span sag calculator performs quick calculation of midspan sag as well as threewave return time with known conductor tension and unit weight. It can be purchased for standalone use to solve exotic problems. Of linesmarts tension calculation over conventional line design software include. A play on words for sagten tension, it is widely recognized as the industry standard for overhead conductor sagtension calculations, utilizing the alcoa graphic method.
Most conductor sag and tension calculations are theoretically based on a simple deadend span of conductor supported at equal elevations. Is there any international standards depicting the calculation of sag. It is also assumed the conductor length does not change with changes in temperature or stress. The tension to sag option allows a user to input the initial stringing tension, and have. Electra includes build in cables library and load parameters which can be user defined and customized. Rulingspansaglite for ios free download and software. Carrollton, ga prweb april 2, 2008 engineers who have come to count on southwires reliability and expertise can now look forward to the release of the recognized industry standard software for sag and tension calculations under the southwire name. Sagsec is commonly used to determine the sags, tensions and support. Pdf temperature and wind impacts on sag and tension of. Saps can act as a plugin to add finite element sagtension to the standard edition of plscadd.
It is because of providing safety of the conductor from not to be subjected to excessive tension. You will know how to calculate sag and sag formula. May 23, 2017 similarly, if the sag is low, then when the line contracts in the winter, low sag will indicate a high tension, and as a result of this contraction, the line may snap. These tension limits specify certain percentages of the conductors rated breaking strength that are not to be exceeded upon installation or during the life of the line. In connection with the design and construction of transmission lines in the mountainous appalachian region the writers have evolved a method of making mathematically exact sag and tension calculations based on catenary formulas that eliminates the trial and. You can use this spreadsheet to verify the results in my sample computation in the previous post. Span having equal level supports is called level span, whereas when the level of the supports is not at an equal level is known as unequal level span. Aug 01, 2018 as promised, you can download for free my sag tension spreadsheet calculator. The linesmarts overhead power line tension measurement function enables. It is the proportional ratio of the temperature and depth of sag.
From distribution wood poles all the way to 500 kv or higher guyed frames and lattice towers, plscadd has the power and flexibility to do it all. These include topics such as terrain modeling, engineering calculations, sag tension and finite element sag tension, drafting and materials as well as a variety of miscellaneous topics. The full plscadd version is a bit pricey, so i would like to get responses from folks who have experience with either of these or all three. Sag and tension for safety purpose, the ground clearance of the conductors at maximum temperature and minimum loading condition should be maintained. Sagtension spreadsheet free calculator even elevation subscribe to blog via email enter your email address to subscribe to this blog and receive notifications of new posts by email. Sagtension calculation program for wood pole overhead lines abstract. Analysis of the sag and tension is important in the transmission line for the continuity and quality of electrical services.
Sample calculation of sag and tension in transmission line. Sag10 software from southwire at 2010 ieee pes youtube. Handle multiple overhead line spans between deadend structures. Line designers need reliable software for proper calculations of sag and tension. This paper presents studies into a new program used to calculate sag and tension of conductors on wood pole lines considering all relevant parameters, such as conductor temperature, wind and ice loadings and creep. How to use plscaddlite to quickly produce a sagtension report. Ocalcpro is structural analysis software for utility poles. In acsraw conductors, the steel core is protected from corrosion by an aluminum coating. Communication bundles create a wide array of communication bundles on the fly within a project or prebuilt into a client library. Sagtension calculation program for wood pole overhead lines. Southwire offers sag and tension software sag10 software now gains southwire reliability and expertise carrollton, ga april 2, 2008 engineers who have come to count on southwires reliability and expertise can now look forward to the release of the recognized industry standard software for sag and tension calculations under the southwire name.
Spanmaster software takes the user through a logical stepbystep process of information entry and produces sag and tension results for any cable span. Take note that because of the complexity of the creep in a conductor, it is not a factor in these calculations. Catenary calculations and sagtension analysis tools enable users to design, edit and optimize transmission lines accordingly. A variety of videos that demonstrate features are available on our news page. Sag10 software, a play on words for sagten tension, is widely recognized as the industry standard for overhead conductor sagtension calculations, utilizing the alcoa graphic method. Sag and tension of transmission and distribution lines.
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