3. Numerical example

3.1 Data

Consider an MV line with the following characteristics:

• 117 mm ² Almelec conductors (ASTER 117) :

  • cross-sectional area S = 116.98 mm ² .

  • radius r = 7 mm

  • nominal electrical resistance at 20 °C = 0.283 Ω/ km

• distance between conductors: 1 m

• height of conductors above ground: 10 m

• soil resistivity: 100 Ω · m (these last two values are only used to calculate the homopolar mode).