High Voltage Underground Cable Selection

Unlike the other Cable Selection tutorials which deals with low voltage (LV) cables, this tutorial deals with underground high voltage (HV) cables from 6.6 kV up to 33 kV.

Important: Cable data used in the worksheet are based on the Olex HV Cable Catalogue. Other manufacturers could be used by substituting the values in Sheets 2 and 3 (hidden).

Required parameters to be set (depending on your design requirements) are:

  • VOLTAGE, i.e.33kV
  • CABLE MATERIAL, i.e. Aluminium
  • INSTALLATION METHOD, i.e. Direct Buried
  • AMBIENT AIR TEMPERATURE, i.e. 20 °C
  • AMBIENT SOIL TEMPERATURE, i.e. 10 °C
  • DEPTH OF BURIAL, i.e. 0.8 m
  • ALLOWABLE CABLE VOLTAGE DROP, i.e. 5%
  • POWER FACTOR, i.e. 0.9

These are highlighted yellow on the worksheet

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Download:High Voltage Cable Sizing Undergground

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