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  • 1387307736

    CYMCAP power cable ampacity software 

    Eaton's CYMCAP power cable ampacity software offers a comprehensive set of powerful tools to assist cable engineers with projects requiring reliable cable thermal ampacity calculations. CYMCAP builds on 30 years of development as the worldwide reference in cable thermal rating calculations.
    Contact our experts
Increase accuracy
Ensure accurate cable modelling based on construction details
​Improve project design
Use what-if scenarios to maximise system efficiency and cost savings
Optimise power transfer
Identify optimal installation parameters and mitigate the risk of cable thermal damage

Highlighted features: 

  • Full compliance with North American practice and IEC standards IEC 60287, IEC 60228 and IEC 60853
  • User-defined standard settings to adjust results based on a user-defined methodology, strictly as per IEC, CIGRE or CYMCAP guidance
  • Cyclic loading simulations as per IEC-60853 or Neher-McGrath
  • Robust optimisation algorithm that maximises the power transfer for equally and unequally loaded circuits
  • Full detailed report (available in Excel) displaying intermediate calculations and specific equations for each cable in the installation
  • Independent libraries for cables, duct banks, load curves, heat sources and installations
  • All types of sheath bonding arrangements for flat and triangular formations with explicit modelling of minor section lengths, unequal cable spacing, transposition and more
  • Detailed loss calculations, including effects produced by induced currents in metallic layers, eddy currents, insulation dielectric losses, magnetic losses, length of the lay, mutual interaction between circuits (optional), etc.
  • Electrical frequency can be assigned per circuit in the same thermal section – AC/DC cables supported within the same installation
  • Soil moisture migration (drying out) can be considered in underground installations
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Improve system reliability with accurate cable modelling calculations

Eaton's CYMCAP power cable ampacity software offers a detailed graphical representation of various power cables, including single-core, three-core, belted, pipe-type, submarine, sheathed, retrofitted and armoured cables. The extended cable modelling capabilities include the following features: 

  • Support for multiple customised non-metallic layers 
  • Consideration of special cable construction layers as a jacket around each core, double armour, corrugated sheath, armour metallic tapes, flat armour wires and more 
  • A dedicated cable library with real examples provided by cable manufacturers 
  • Calculation of electric field strength for HVDC cables, which is commonly a key factor affecting ampacity
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power distribution plans

Confidently upgrade and design power cable installations

The power cable ampacity software supports different installation conditions, including direct burial, thermal backfill, underground ducts and duct banks. Users can emulate various soil conditions based on depth with environment templates. The software's installation capabilities include:

  • Modelling of groups of cables in air as per IEC 60287, cables in riser poles and non-isothermal earth surface of shallow cables
  • Consideration of mutual heating effects produced by multiple heat sources and heat sinks and magnetic losses produced in metallic magnetic ducts
  • Estimation of soil temperature around cables and hot sources with customisable isothermal curves
  • Accurate modelling of metallic and non-metallic ducts filled with air, water or solid materials and multiple cables per phase with sheath mutual inductances

Get accurate transient and emergency calculations

Gain a deeper understanding of the thermal behaviour of circuits exposed to specific demand profiles and advanced transient thermal analysis for multiple circuits in different modes and loading conditions. 

  • Import loading conditions from Excel files for circuits and heat sources and associate each circuit with a specific load profile
  • Define temperature constraints for multiple cable components simultaneously, such as conductor, sheath, armour and/or exterior

Obtain a meaningful graphical representation of the cable's behaviour for a selected variable of interest:  

  • Temperature of main cable components as a function of the time given a user-defined demand
  • Ampacity given described emergency times and required maximum temperature
  • Estimated time to reach maximum temperatures in emergency conditions
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Software modules 

Additional installation modules

Additional analysis modules

Additional resources

Related digital products

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Need product support? 

We are committed to delivering best-in-class solutions and providing exceptionally focused customer service. Our dedicated experts work closely with engineers throughout the entire project to successful completion.

Eaton is an intelligent power management company dedicated to improving the quality of life and protecting the environment for people everywhere. We are guided by our commitment to do business right, to operate sustainably and to help our customers manage power ─ today and well into the future. By capitalizing on the global growth trends of electrification and digitalization, we’re accelerating the planet’s transition to renewable energy and helping to solve the world’s most urgent power management challenges.
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