Cable Thermal Software

Cable Thermal Analysis

Cable Thermal Analysis

Design   Operation   Expansion
The Cable Thermal Analysis module helps engineers to design cable systems to operate to their maximum potential while providing a secure and reliable operation.
Cable thermal analysis study in ETAP
The advanced graphical interface allows for design of cable raceway systems to meet the existing and future needs by using precise calculations to determine the required cable sizes, their physical capabilities, and maximum derated ampacity. In addition, transient temperature analysis computes temperature profiles for cable currents, reducing the risk of damage to cable systems under emergency conditions.

Cable Thermal Analysis Key Features

Cables inside underground raceways

Cable Thermal Analysis Capabilites

  • Graphical user interface
  • Graphical manipulation of raceways, cables, conduits, etc.
  • Drag & drop cables from one-line diagrams
  • Cables of different sizes in the same raceway
  • Separate phases into different conduits or locations
  • Unsymmetrical positioning of raceways
  • Transient calculations use a dynamic thermal circuit model
  • Option to fix cable size and/or loading
  • Grounded/ungrounded shielding
  • Calculate thermal R, dielectric losses, Yc, Ys, etc.
  • User-defined armor cables
  • Unbalanced load factors
  • Multiple duct banks & direct-buried conduits
  • Place raceways in multiple cross-sections

Flexible Operation

  • Multiple raceways
  • Multiple external heat sources
  • Optimization of new cables in existing raceways
  • Cross-sectional analysis
  • Duct banks & direct buried raceways
  • Integrated with cables in one-line diagrams
  • Integrated with load flow results
  • Integrated with cable pulling analysis
Underground raceway study with cables from one-line diagram

Plotting & Reporting

  • Transient temperature calculations based on load profile
  • Option to display multiple cables simultaneously
  • Zoom to any detail level
  • Export data to Microsoft Excel
  • Line, bar, 3-D, & scatter plots
  • Customize text & axes
  • Flag critical & marginal cable temperatures
  • Reports all physical & calculated data
  • Use Crystal Reports for full color, customizable reports
  • Export output reports to your favorite word processor
  • Graphical display of raceway results
Output report for underground cable

The cable ampacity calculation and cable sizing are based on the NEC accepted Neher-McGrath method and IEC 60287 standard for steady-state temperature calculation. The transient temperature calculation is based on a dynamic thermal circuit model. All of these calculations can handle multi-raceway systems and consider the effect of heat generated by neighboring cables and external heat sources.

Standards / Method Title
Neher-McGrath The Calculation of the Temperature Rise and Load Capability of Cable Systems
IEC 60287-1-1  Ed. 1.2 b:2001 Electric cables - Calculation of the current rating - Part 1-1: Current rating equations (100% load factor) and calculation of losses - General
IEC 60287-2-1   Ed. 1.1 b:2001 Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance
IEC 60287-2-1  Amd.1 Ed. 1.0 b:2001 Amendment 1
IEC 60287-2-1  Amd.2, 2006-03 Amendment 2
IEC 60287-3-1   Ed. 1.1 b:1999 Electric cables - Calculation of the current rating - Part 3-1: Sections on operating conditions - Reference operating conditions and selection of cable type
IEC 60287-3-1 Amd.1 Ed. 1.0 b:1999 Amendment 1

Video Tutorials

Cable Thermal Analysis for Underground Raceways

Cable Thermal Analysis for Underground Raceways

Learn how to save design time using the Raceway Rulebook to auto-layout cables within duct banks. Find out how to determine the optimal cable sizes, physical attributes, and maximum derated ampacity using Neher-McGrath method and IEC 287 standard.


Underground Raceway Systems

Underground Raceway Systems

White Papers