Cableizer ®

Temperature conductor z

Conductor temperature at the point z in the cable route in the tunnel.

Symbol
$\theta_{c,z}$
Unit
°C
Formulas
$\theta_{o,z}+W_{c} \left(T_{1}+n_{ph} \left(1+\lambda_{1}\right) T_{2}+n_{ph} \left(1+\lambda_{1}+\lambda_{2}+\lambda_{3}\right) T_{3}\right)+W_{d} \left(\frac{T_{1}}{2}+n_{ph} \left(T_{2}+T_{3}\right)\right)$cables
$\theta_{o,z}+W_{c} \left(T_{1}+n_{c} \left(1+\lambda_{1}\right) T_{prot}\right)$PAC/GIL
$\theta_{o,z}+W_{hs} T_{hs}$heat sources
Related
$\lambda_{1}$
Loss factor shield (screen/sheath)
$\lambda_{2}$
Loss factor armour
$\lambda_{3}$
Loss factor steel pipe pipe-type cable
$n_{c}$
Number of conductors cable
$n_{ph}$
Number of phases in a cable
$T_{1}$
Thermal resistance conductor—sheath [K.m/W]
$T_{2}$
Thermal resistance armour bedding [K.m/W]
$T_{3}$
Thermal resistance jacket [K.m/W]
$T_{hs}$
Thermal resistance heat source [K.m/W]
$T_{prot}$
Thermal resistance protective cover [K.m/W]
$\theta_{o,z}$
Temperature object surface z [°C]
$W_{c}$
Conductor losses (phase) [W/m]
$W_{d}$
Dielectric losses (phase) [W/m]
$W_{hs}$
Heat dissipation heat source [W/m]