Cableizer ®

Thermal resistance insulation

Symbol
$T_{i}$
Unit
K.m/W
Formulas
$\frac{\rho_{i}}{2\pi} \ln\left(\frac{D_{i}}{d_{c}}\right)$IEC 60287
$T_{ct}+T_{cs}+T_{ins}+T_{is}$CIGRE TB 880 Guidance Point 15
Related
$d_{c}$
External diameter conductor [mm]
$D_{i}$
Diameter over insulation incl. insulation screen [mm]
$\pi$
Archimedes' constant $\pi$
$\rho_{i}$
Thermal resistivity insulation material [K.m/W]
$T_{cs}$
Thermal resistance conductor shield [K.m/W]
$T_{ct}$
Thermal resistance conductor tape [K.m/W]
$T_{ins}$
Thermal resistance insulation [K.m/W]
$T_{is}$
Thermal resistance insulation screen [K.m/W]