CYMCAP

Current Carrying Capacity
in Power Cables

CYMCAP software is designed for the calculation of current carrying capacity and thermal strength for power cable installations. In the design of electrical systems, it is extremely important to determine the maximum current that the power cables can carry without losing their electrical and physical specifications. Analysis of the different conditions effecting the current carrying capacity can be do easily with the CYMCAP software.

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Software Specifications

  • Full compliance with IEC 60287, IEC 60228, IEC 60853 standards
  • Optimum cable selection
  • Detailed analysis of all environmental conditions impacts
  • Non-isothermal soil modeling
  • An enriched library for all cable, pipe and load profiles
  • Detailed graphical display of power cables
  • User-defined load profiles
  • Install systems simultaneously or at different times
  • Consideration of opposite inductance in multiple systems
  • Supporting all types of side by side, trefoil or irregular shape

Additional Modules

The CYMCAP Additional Modules offer extended capabilities to the CYMCAP software, allowing modeling more installations, particularly non-standard installations. This includes the modeling of installations with multiple ductbanks and backfills each with different thermal resistivity; the calculation of the ampacity and temperature of cables in unventilated tunnels; the rating of cables in both filled and unfilled troughs; and the rating of cables in one or more non-magnetic casings.

  • Multiple Duct Banks and Backfills
  • Cables in Tunnels
  • Cables in Troughs
  • Multiple Casings

Multiple Duct Banks and Backfills

The Multiple Duct Banks and Backfills add-on module is designed to determine the steady-state ampacity of cables installed in several neighboring duct banks and/or backfills with different thermal resistivity. The module presents a unique solution combining standard and non-standard calculation methods. Also continuous current carrying capacities can be calculated. The thermal strengths of the cables laid on the channels that are covered with filling materials can be analyzed.

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Cables in Tunnels

The optional Cables in Tunnels module allows the user to determine steady-state temperature and ampacity, cyclic loading, emergency rating and transient analysis for cables installed in unventilated tunnels.

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Cables in Troughs

With this module, cables can be easily analyzed on the concrete cable trays (floor, wall or cable racks). Also the effect of heat transfer on the cable trays with full or empty inside can be observed.

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Multiple Casings

The Multiple Casings add-on module allows the user to determine the steady-state unequally loaded ampacity and/or temperature rating of cables installed in one or more non-magnetic casings.

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These add-on modules provide the ability to evaluate the magnetic flux density at any point on or above the ground of an underground cable installation, determine the positive and zero sequence impedances and admittances for all the cables in an installation, calculate short-circuit cable ratings, determine the optimal placement of multiple circuits within a ductbank given specified constraints and calculate the ampacity of two circuits crossing each other.

  • Analysis of Cable Crossings
  • Magnetic Fields Analysis
  • Optimizing of Cable Ducts and Channels
  • Calculation of Cable Impedance 
  • Classification of Cables According to Short Circuit Currents

Analysis of Cable Crossings

The Analysis of Cable Crossings module allows the user to determine the steady-state ampacity of two circuits crossing each other. When two circuits cross each other, each of them behaves as a heat source for the other one. By using the analysis of cable crossing module, one can achieve ratings up to 20% higher than the conservative ampacities that are obtained based on the parallel installation scenario.

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Magnetic Fields Analysis

The Magnetic Fields Analysis module is an add-on module to the CYMCAP software. After a steady-state ampacity or temperature simulation, the module computes the magnetic flux density at any point on or above the ground of an underground cable installation.

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Optimizing of Cable Ducts and Channels

The Optimizing of Cable Ducts and Channels module allows the user to determine the optimal placement of several circuits within a duct bank. More specifically, the module can recommend various circuit configurations within a duct bank.

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Calculation of Cable Impedance

The Colculation of Cable Impedance module calculates the electrical parameters for cables necessary for performing load flow and short-circuit studies at the power frequency (50/60 Hz).

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Classification of Cables According to Short Circuit Currents

The Classification of Cables According to Short Circuit Currents module is dedicated to the rating of cables for short-circuit currents. Short circuit current of the cables can be determined by specifying the starting temperature and the final temperature.

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