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Ohmic losses per phase

Symbol
$W_I$
Unit
W/m
Formulae
$W_c \left(1+\lambda_1+\lambda_2+\lambda_3+\lambda_4\right)$
Related
$\lambda_1$
Loss factor of shield (screen and sheath)
$\lambda_2$
Loss factor of armour
$\lambda_3$
Loss factor of steel pipes for pipe-type cables
$\lambda_4$
Loss factor of magnetic steel ducts
$W_c$
Conductor losses [W/m]
Used in
$\Delta \theta_c$
Temperature rise of conductor [K]
$\Delta \theta_{e,t}$
Transient temperature rise of outer surface [K]
$g_{dry}$
Geometric constant of circle with dried-out soil [p.u.]
$\theta_{di}$
Temperature of duct inner wall [°C]
$\theta_e$
External temperature of the object [°C]
$W_t$
Total losses per phase [W/m]