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Power cable ampacity

Engineers are often called upon to calculate ampacity and temperature rise of power cable installations to help increase system reliability and support the proper utilization of installed equipment.
Eaton's CYME CYMCAP software is for performing ampacity and temperature rise calculations for power cable installations. Determining the maximum current power cables can sustain without deterioration of any of their electrical properties is important for the design of electrical installations. It addresses steady state and transient thermal cable rating as per the analytical techniques described by Neher-McGrath and the International Standards IEC 287 and IEC 853. This software was developed jointly by Ontario Hydro (Hydro One), McMaster University and Eaton (CYME International), under the auspices of the Canadian Electricity Association. The validation of the results obtained with the CYMCAP software provides for increased confidence when upgrading existing power cable installations and designing new ones, thus maximizing the benefits from the considerable capital investment associated with them.

Power cable ampacity software

Analytical capabilities

  • Iterative techniques based on Neher-McGrath and IEC-287 methods
  • Full compliance with North American practice and compliance with IEC standards, IEC 60287, IEC 60228, IEC 60853, etc.
  • Detailed graphical representation of virtually any type of power cable. This functionality can be used to modify existing cables data and enrich the cable library with new ones. This includes single-core, three-core, belted, pipe-type, submarine, sheathed and armored cables
  • Different cable installation conditions such as directly buried, thermal backfill, underground ducts or duct banks
  • Pipe-type cables directly buried or in thermal backfill
  • Independent libraries and databases for cables, duct-banks, load curves, heat sources and installations
  • Modeling of cables in air on riser poles, groups of cables in air, moisture migration, nearby heat sources and heat sinks, etc.
  • Different cable types within one installation
  • Non-isothermal earth surface modeling
  • Cyclic loading patterns as per IEC-60853, including soil dry out
  • Multiple cables per phase with accurate modeling of the sheath mutual inductances which greatly influence circulating current losses and thus de-rates the ampacity of cables
  • All types of sheath bonding arrangements for flat and triangular formations are supported with explicit modeling of minor section lengths, unequal cable spacing, etc.

Transient analysis

  • Ampacity given time and temperature
  • Temperature analysis given time and ampacity
  • Time to reach a given temperature, given the ampacity
  • Ampacity and temperature analysis as a function of time
  • User-defined load profiles per circuit
  • Multiple cables per installation
  • Circuits can be loaded simultaneously or one at a time

CYME Power Cable Ampacity Software

Eaton’s CYME CYMCAP software calculates ampacity and temperature rise calculations for power cable installations.

Download brochure

Need product support?

CYME users portal: my.cyme.com

E: Digital-EnquiryEMEA@eaton.com

Questions before you buy

E: Digital-EnquiryEMEA@eaton.com

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