Duct losses

In case of ducts made of (ferro)magnetic steel, the conductor current induces a current in the pipe which causes additional losses.

We calculate these losses using a separate loss-factor $\lambda_4$ for cables in a common magnetic steel pipe to distinguish them from the armour losses and from the losses in pipes of pipe-type cables.

Symbol
$W_{duct}$
Unit
W/m
Formulas
$\lambda_{4} W_{c}$
Related
Used in
$\Delta \theta_{c}$
$\Delta \theta_{duct}$