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  EDSA CABLE AMPACITY PROGRAM

EDSA’s Cable Ampacity program utilizes the techniques and formulae suggested in the IEC (International Electrotechnical Commission) standard publication No. 60287 and 60853 to compute the temperature rise and ampacity of power cables in the steady-state and transient conditions.
 
  Cable ampacity assessment and temperature rise calculations is an important but time-consuming task for cable manufacturers, designers and operators. This is due to the fact the computations often includes numerous mathematical calculations and extensive table look up and data processing.
   
 
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Graphical Manipulation: Cable Data
       
    This program also offers an alternative computational method to handle non-unity load factor based on the Neher-McGrath technique. Several enhancements to both Neher-McGrath and IEC 60287 standard have been implemented. These include:  
       

 
     
    Key Program Features:
     
  • Powerful, easy to use, graphical
  • Simulation of soil drying out in the vivinity of energized cables;
  • Non-isothermal earth surface;
  • Cables without metallic sheath but with copper concentric neutral that can be single or both ends bonded and grounded;
  • Steel armored submarine cables with or without concentric neutral or metallic sheath;
  • Cables on riser poles;
  • Single phase circuits consisting of one single core cable with concentric neutral wires or sheath serving as the return conductor;
  • Duct banks and backfills of any size;
  • PPP (Paper-polypropylene-paper) laminated cables;
  • The cyclic and emergency loading of power cables is implemented based on the IEC 60853;
  • The cable ampacity program facilitates the simulation of touching cables;
  • Computation of the cable sheath losses when a cable has no skid/concentric neutral wires, no armor, or no reinforcement tape was modified to correctly reflect the modeling of this type cables.
  • The transient analysis program helps the users in finding:
    o What the final conductor temperature would be (with the defined load curve) if cable loading increases by certain amount and duration?
    o How long cables in a study can be operated (with the defined load curve) if cable loading increases by certain amount?
    o What is the maximum current the cables can carry for a specified period of time if the temperature of the conductor not to exceed by certain amount
     
     
     
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  Graphical Manipulation: Cable Installation Cable Ampacity Results: Steady State Simulation Results
     
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  Cable Ampacity Results: Transient Simulation Results  
     
 
   

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