The cable is fed from the bottom of the reel so that its curvature is continuous with no reversed bends. Engineering data for copper and aluminum conductor electrical. Helps determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. High voltage testing is recommended both before and after the installation. Step 1 calculate pull tension at first straight section at feed end. Cable type, number of cables, covering material, pull type, length, offset angle, conduit size, conduit type, coefficient of friction reverse sidewall bearing pressure the radial pressure experienced by the cable as it is pulled backward through a curved section. Use this simple tool to calculate conduit size and fill percentage, pulling tensions, cable sidewall. Calculate the voltage drop of a defined cable and check the maximum length. For example, a pull box contains two conduits located on opposite walls. Engineering data for copper and aluminum conductor. The last 90 was pulled using a unistrut lever bar on the rope.
Ensure safety while avoiding damage to cables during installation. It combines the accepted cable pulling equations with an internal database of friction data from polywaters laboratory. Electrical tools ms excel spreadsheets this section is dedicated to tools every electrical engineer can use in daily work. You can use sheet 3 to automatically enter the cable weight.
Use the largest raceway to size pull boxes containing differentsize raceways. Electrical calculation tools schneider electric global. Cable calculation software mvhv specific iet engineering. A program for cable pulling tension calculation and conduit system design. Cable quickly solves complex threedimensional cable pulling tension and sidewall pressure calculations, allowing you to make rapid.
Urd cable pulling installation pulling cables do not exceed maximum allowable pulling tension do not exceed maximum swbp use proper amount of pulling lube pull with a capstan whenever possible max pulling speed should be 40 ftmin do not stop a pull unless absolutely necessary make sure cable ends are sealed when cut. Ieee std 5252016 guide to the design and installation of cable systems in substations. Understanding wire pull calculations basics youtube. Heres how it works, for single or three phase cable calculations, simply. Join us as we talk about wire pulling calculators and the things you need to have a successful pull calculation. Cable pulling software cable pulling analysis etap. Greenlees pullcalc app find the approximate pull force needed to install electrical cable inside conduit. Hi, i am hoping someone might be able to offer some opinions. Cable calculation software mvhv specific linsey birkett joined 15012014 2 posts question. Design safe and efficient cable pulls with pullplanner 4. Jan 06, 2009 well, since the diameter of the cable is 3. Preexisting cable databases can also be added to the pull. The current obtained has to derated since the cable is designed to operate at a defined temperature. Use this simple tool to calculate conduit size and fill percentage, pulling tensions, cable sidewall pressure, jam probability, voltage drop, ground wire sizing, and.
Singlecable is a cable calculation software that is extremely simple to use and provides results in seconds, whether the cable is a submain feeder or final circuit. The cable pulling module accounts for multiple cables of different sizes and allows complex 3d pulling path geometry. The friction is greatly increased when restarting a pull. Cable ampacity power system software and arc flash hazard. The estimated pull force will be displayed at the bottom of each leg column. The pull went smoothly until the last 90 that multiplied the tension from about 67 lb. The accuracy of the calculation provides increased confidence in the design, upgrading, and analysis projects. It accepts pull and cable data saved under the previous pullplanner software versions. Electrical engineers use powertools to perform harmonic analysis, transient stability analysis, short circuit analysis, and to determine demand load, voltage drop, arcflash hazard analysis and protective device coordination. July 22, 2008 textrons greenlee has introduced its pf8 pull force estimator. Then enter the diameter for each cable, select number of cables, type of raceway, fill type either 25 per cent, 60 per cent or auto. This knowledge makes it possible to avoid underestimated andor over conservative design practices to achieve substantial capital savings during construction.
Feb 06, 2014 calculate cable pull tension and provide previously to do my cable pull calculations i was using an awkward software program calculation and ieee xplore abstract a pulling tension a cable pulling tension calculation software program is developed which draws friction coefficients from a curve input by the user. Enter the total cable weight and a coefficient of friction in the respective boxes. Get the cable size corresponding to this derated current from the catalog. Provides the ability to alter data that indicates tension or sidewall pressure. No download needed, direct access from your web browser. Jul 22, 2014 memory 230 may include a cable pull calculator software module 235 and a database 240. Suitable for any type of cable, any pulling profile and any installation method. Pullplanner 3000 for windows cable pulling software from american polywater aids pull tension calculation, conduit system design, lubricants, installation. Next, find the cable size for the short circuit capacity of the system. A pointbypoint calculation method is performed at every conduit bend and pull point. Conduits, cable tray or cable ladder installations. When the cable raceways have been defined at the projecting stage, the software suggests how to route the cables, and makes it easy to decide how to dimension the raceways. Feb 03, 2019 continuation of ug cable pulling program training for electric utilities. This cable puller tension estimator software license agreement is a legal agreement between you either an individual or a single entity and greenlee textron incorporated for the greenlee software product identified above, which.
These spreadsheets below will make your job much more easier, alowing you to shorten the time used for endless calculations of cables, voltage drop, various selections of circuit breakers, capacitors, cable size and so on. Helps to estimate and manage cable installation projects. High voltage testing is recommended before and after the installation. Once its installed, all you need to do is enter the cable type, ref method, the maximum load in kw or watts and the cable length in metres. The software checks for each bend if the radius is below the minimum bending radius and gives a warning if not. Perform cable pulling tension and sidewall pressure calculations. American polywaters pullplanner 3000 is a menudriven, userfriendly program for calculating cable pulling tension.
Pullplanner 3000 for windows cable pulling software for. It may be that, if a higher for the pull rope is incorporated later, the combined effect can be. Sidewall bearing pressure swbp is calculated using the inside radius of the. Once calculated, the program also enables you to look at the results for the next cable size larger or smaller, and the same facility is available for the protective device. Jul 08, 2017 understanding wire pull calculations basics.
The app will instantly calculate and display the minimum cable size, the voltage drop in volts and as a percentage and the load current in amps. To determine how the conductors will sit in the conduit, refer to table 4 for the inside diameter d of the 5in. Calculating the correct size of pull box needed can be complicated, so please feel free to contact us or call 8007671576 if you need assistance. Oct 11, 2000 avoid letting the cable stop part way through the pull. From what i understand, to find linear force for a winch i must use this formula. The company says the product provides a quick and easy way to estimate in advance the pulling force required for cable pulling jobs. Cable pulling electrotechnik pty ltdelectrical calculations software. Jul 22, 2008 greenlee develops cable pull tension estimator. Memory 230 may include a cable pull calculator software module 235 and a database 240. These online calculators determine appropriate product quantities based on job details. Use the ratio of the conduits inside diameter d to the cables outside. The software is an efficient tool for making complex calculation tasks straightforward and easy. Electrical calculation tools are based upon schneider electric ecodial electrical network calculation wellknown software. Cable lengths are calculated automatically based on the coordinates of the raceways, which makes it possible to specify the exact cable lengths when ordering.
The pull force is calculated by legs, straight runs of conduit followed by a bend, and the force needed for each leg is found when app users enter information regarding the materials being used for the cable insulation into pullcalc. Jan 17, 2000 pull tension would decrease from 322 to 239 lbs after conductors passed second 90. Pullplanner 3000 cable pulling software sm systems. Cable material, method of installation and circuit protection i. Tension estimates are useful in designing conduit systems and planning cable pulls. Using software to simplify cable pulling sm systems. Etap has been one of the most popular software used by many companies and electric utilities.
Both the forward and reverse pulling tensions are calculated for determining the preferred direction of pull. Enter the number of unique cables and a calculator for the cables is custom built in the lower frame. Greenlee develops cable pull tension estimator cabling. Accurate prediction of cable pulling tension is essential for the proper design of cable systems. The load current, length of cable run and voltage drop i. Figure f2 cable feed into conduit at floor level c from cable reel to cable tray, the cable is fed from the top of the reel to maintain required curvature. Pullplanner 3000 for windows cable pulling pullplanner 3000 for windows cable pulling software from american polywater aids pull tension calculation, conduit system design, lubricants, installation calculating cable pulling tensions ec online. Cableizer blog post about cable pulling calculation tool. Pf8 cable pull force estimator software license agreement of greenlee textron, inc. If there is a known drag on the cable before it enters the conduit, that force can be entered in the initial cable tension box. Cable ampacity power system software and arc flash. Continuation of ug cable pulling program training for electric utilities. The cpa does not evaluate the effect of both the rope and cable being pulled at the same time and instead calculates the tension when the rope or cable is in full length in contact with the conduit within the system i.
I have tried grid cable max and heard of an autralian project called cable calc pro. A small sample cable database includes five cable types in english units and five types in metric units. Home resources calculators simpull cable pull calculator. Pullplanner 3000 for windows calculates cable pulling tension and sidewall pressure around bends using the pulling equations. Blog post about cable pulling calculation tool cableizer. Method iv reverse pull and feed ends and use second person pushing 50 lbs at feed end. While executing on processing unit 225, cable pull calculator software module 235 may perform processes for providing cable pull calculations, including, for example, one or more of method 300 stages as described below with respect to fig. I will be carrying out a lot of cable calculations ratings, pulling tensions etc.
Derating factors will be available in cable catalog. Users can print hard copy with all pull details and calculation results. The software examines cable temperature and ampacity in performing analysis of existing systems. Determining the size of underground pull and junction boxes to meet nec 314. The box width and depth must be large enough to provide proper installation of the raceway or cable, including locknuts and bushings see figure 6. Calculator for underground cable pulling tensions by lah. If you pull quadruplexed individual conductors from a single reel, the multiconductor cable will also sit in this position. Seal the ends of the installed cable to prevent moisture from getting inside the cable.
Pull and junction box calculations electrical contractor. Avoid letting the cable stop part way through the pull. Use the ratio of the conduits inside diameter d to the cable s outside. Determine both the 600 volt and medium voltage calculations to estimate and manage cable installation projects. Pull planner 2000 software uses commonly accepted pulling equations to estimate cable pulling tension and sidewall pressure around bends. Pullplanner 2000 software uses commonly accepted pulling equations to estimate cablepulling tension and sidewall pressure around bends.
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