Cableizer ®

Thermal capacitance conductor tape (IEC 60853)

The capacitance of the equivalent conductor for multi-core cables is equal to the sum of the capacitances of the conductors plus the capacitance of that portion of the insulation which is enclosed within the perimeter of the equivalent conductor.

Symbol
$Q_{ct}$
Unit
J/(m.K)
Formulas
$\frac{\sigma_i \left(\left(\frac{d_c}{2}+t_{ct}\right)^2-\left(\frac{d_c}{2}\right)^2\right)}{{10}^6}$single-core cables
$\frac{\sigma_i \left(\left(\frac{d_c}{2}+t_{ct}\right)^2-\left(\frac{d_c}{2}\right)^2\right)}{{10}^6}$multi-core cables, round conductors
$\frac{\frac{\sigma_i \left(\left(\frac{d_c}{2}+t_{ct}\right)^2-\left(\frac{d_c}{2}\right)^2\right)}{{10}^6}}{n_c}$multi-core cables, sector-shaped conductors
Related
$d_c$
External diameter conductor [mm]
$n_c$
Number of conductors cable
$\sigma_i$
Volumetric heat capacity insulation material [J/(K.m$^3$)]
$t_{ct}$
Thickness conductor tape [mm]