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. It can calculate the section static equilibrium configuration for arbitrary. The conductors are attached between two supports with perfect value of sag. It develops sagtension reports as well as stringing charts for a user definable range of span lengths and stringing temperatures. Sag calculation sag calculation for the planning and. 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 method for the sagtension calculation in electrical overhead lines i. Pdf sagtension calculations a tutorial developed for. These factors enable the program to calculate regular sags and tensions of ruling spans, in addition to providing users with access to new output on structural. 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. Sag tension calculation excel sheet in titlesummary. A method for the sagtension calculation in electrical. Take note that because of complexity of the creep in conductor, is not a factor in this calculations.
Sag10 software, a play on words for sagten tension, is widely recognized as the industry standard for overhead conductor sagtension calculations. With improved user interface, algorithmic logic, and several new features, sag10 v. Spanmaster cable sag and tension calculation software. The following calculations are included in the website, requires minimal training and take seconds to perform. Pdf this paper presents studies into a new program used to calculate sag and tension of conductors on wood pole lines considering all relevant. Pdf sagtension analysis of aaac overhead transmission. Is there any books reference material so that we can match the result of plscadd in excel manual calculation. During the erection of overhead transmission line, the conductors are connected between two tower structures. Sag10 is attractive to engineers due to its ease of use, the speed. How to use plscaddlite to quickly produce a sagtension report. It can be purchased for standalone use to solve exotic problems.
Pls caddultralite is a streamlined version of plscadd for quick modeling of a single span of conductor or wire. Sample calculation of sag and tension in transmission line uneven elevation. Let, l length of the span, w weight per unit length of the conductor, t. For calculating sag in a stay, i dont see the catenary equations, with hypebolic trigonometry and transendental mathematics, giving results that are significantly superior to the algebraic equations for a parabola. The horizontal component of tension remains constant throughout the span of conductor. Sagtension spreadsheet free calculator even elevation. Sag10 is one of the world best software products for overhead power and telecom lines cables, ground wires and phase wires sag and tension calculation. 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 tension calculation, referance constructed items. Pdf sagtension calculation program for wood pole overhead. Mass dependent, temperature dependent forces and additional loads caused by the weather e. It is because low sag means a tight wire and high tension, whereas a low tension means a loose wire and increased sag. A play on words for sagten tension, it is widely recognized as the industry standard for overhead conductor sag.
No matter what question or concern you have about southwires sag10 software, we can help. Hence the complete conductor length s from a to b is obtained by substituting typically, a 400 m span and a tension of 2500 kg with a conductor of mass 1. Its operation based on nonlinear graphical method invented by alcoa american aluminum industry leader at 1926 which analyze cable behavior during changing of temperature and climate conditions. Sagsec is commonly used to determine the sags, tensions and support reactions of a. Saps can act as a plugin to add finite element sagtension to the standard edition of plscadd. As discussed earlier in this post, enough sag shall be provided in overhead transmission line to keep the tension within the safe limit. A new version of southwires sag10 software for calculating sag and tension in overhead conductors is now available with. It develops a sagtension report as well as stringing charts for a user definable range of span lengths and stringing temperatures. Sag is mandatory in transmission line conductor suspension. This paper presents a method for the sagtension calculation of. Sagtension calculation program for power substations. The weather conditions can be set in primtech quickly and easily for both the whole. Ocalcpro is structural analysis software for utility poles.
The simulations were carried out in etap software and the results showed that with the rise of temperature the. Sagtension calculation program for wood pole overhead lines. You can quickly display your line in 3d for any weather condition complete with insulator swings and wire blowout. 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.
Clearances from wires to ground or between phases can also be calculated under any weather conditions. It is because of providing safety of the conductor from not to be subjected to excessive tension. This software package helps system engineering and construction groups model and optimize conduit cable pulls before construction begins. Plscaddultralite plscaddultralite is a streamlined version of plscadd for quick modeling of a single span of conductor or wire. The calculation of conductor at an equal level shown below. Southwires sag10 software combines more than 90 years of sagtension calculating experience with over 65 years of conductor design and modeling expertise to. Take note that because of the complexity of the creep in a conductor, it is not a factor in these calculations. Therefore, in actual practice, a compromise is made between the two. Sag in overhead transmission line and its calculation. You can use this spreadsheet to verify the results in my sample computation in the previous post.
Commscope s 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. Sagsec is a powerful and easy to use microsoft windows program for the exact. The user should understand first the fundamental concepts of sagtension so that he can appreciate the equations and the result. In order to permit safe tension in the conductor, conductors are not fully stretched. Lets, a conductor is in the two equal level supports a and b. 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. Handle multiple overhead line spans between deadend structures. Pdf sagtension calculation program for wood pole overhead lines. In the previous post, we calculated the sag and tension of a transmission line given that the conductors supports are at the same elevation. Sag and tension calculations for cable and wire spans using catenary formulas abstract. Sagtension spreadsheet free calculator even elevation as promised, you can download for free my sagtension spreadsheet calculator. Sag and tension calculations for cable and wire spans. 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. In this example we will calculate the sag and tension if the conductor supports are at different elevation.
Because, low sag means a tight wire and high tension, whereas low tension means a loose wire and increased sag. Fernandez1 abstract the sag and tension values of overhead conductors are influenced by the creep developed during the line lifetime. 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. Commscope s spanmaster software is a tool designed for use in the calculation of sag and tension of single or multiple cable combinations under various environmental.
Sag10, the industry standard for sagtension calculation software, is now more powerful than ever. Utility line design has over twentyfive planned calculations that will be added to the website at no added charge in the coming months. 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. As promised, you can download for free my sagtension spreadsheet calculator. Structural analysis of power and communication systems is the analysis engine that powers our other software. Sagtension calculation program for power substations ieee xplore. In an overhead line, the sag should be so adjusted that tension in the conductors is within safe limits. Works with any of the over 5,000 predefined cables in our. Within ocalc pro, there are several tension types available for a user to choose from additional information on those tension types can be found in the wiki article on various types of tension. The document is organized by first describing the underlying. In acsraw conductors, the steel core is protected from corrosion by an aluminum coating. This article focuses on a new feature in ocalc, called the sag tension table generator. Sample calculation of sag and tension in transmission line.
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. 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. How can we develop manual excel sheet sag tension calculation of conductor considering creep effect. Sagtension calculation program for wood pole overhead lines catherine baker john baker hassan nouri power systems and electronic scottish and. A new version of southwires sag10 software for calculating sag and tension in overhead conductors is now available with featured enhancements. A new method for determining transmission line sags and tensions is.
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