Cable Crossing

Script: examples/crossing_cables.py

Analyses the mutual thermal effect when an MV cable crosses over an LV cable at 60°. Includes derating calculations and a comparison between isolated and crossing-affected temperatures.

Setup

  • Upper cable: 1 × 240 mm2 Cu XLPE 20 kV at 0.9 m depth, 350 A

  • Lower cable: 3 × 150 mm2 Cu XLPE 0.6 kV at 1.2 m depth, 280 A

  • Crossing angle: 60°

  • Soil: standard soil

What it demonstrates

  1. Creating a CableCrossing

  2. Computing steady-state mutual temperature rise

  3. Computing derating factors with crossing_derating_factor()

  4. Tabulating the transient temperature rise over time

  5. Running isolated cable simulations and superimposing the crossing effect

  6. Quantifying the temperature difference: isolated vs. with crossing

Output files

  • crossing_cables_temperatures.png — conductor temperature comparison (isolated vs. with crossing) for both MV and LV cables