Cableizer ®

Heat generated by external object

Heat generated by external heat source / cable $h$.

Symbol
$W_{h}$
Unit
W/m
Formulas
$\mu n_{ph} \left({I_{c}}^2 R_{c} \left(1+\lambda_{1}+\lambda_{2}+\lambda_{3}+\lambda_{4}\right)+W_{d}\right)$cables
$\mu n_{ph} {I_{c}}^2 R_{c} \left(1+\lambda_{1}\right)$PAC/GIL
$W_{hs}$heat sources
$0$FOC
Related
$I_{c}$
Conductor current [A]
$\lambda_{1}$
Loss factor shield (screen/sheath)
$\lambda_{2}$
Loss factor armour
$\lambda_{3}$
Loss factor steel pipe pipe-type cable
$\lambda_{4}$
Loss factor magnetic duct
$\mu$
Loss factor daily load variation [p.u.]
$n_{ph}$
Number of phases in a cable
$R_{c}$
Electrical resistance conductor [$\Omega$/m]
$W_{d}$
Dielectric losses (phase) [W/m]
$W_{hs}$
Heat dissipation heat source [W/m]
Used in
$\Delta \theta_{0x}$
Temperature rise by crossing heat sources [K]
$\Delta \theta_{0x,h}$
Temperature rise of the conductor by source h [K]
$\Delta \theta_{uh}$
Temperature rise by crossing heat sources z [K]