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Thermal capacitance conductor

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
$Q_c$
Unit
J/(m.K)
Formulas
$\frac{\sigma_c A_c}{{10}^6}$IEC 60853
$\frac{F_{lay,c} \sigma_c A_c}{{10}^6}$Increased area for stranded conductors
$\frac{1.05\sigma_c A_c}{{10}^6}$Test case for Draft CIGRE WG B1.72
Related
$A_c$
Cross-sectional area conductor [mm$^2$]
$F_{lay,c}$
Effective length per unit lay length conductor strands
$\sigma_c$
Volumetric heat capacity conductor material [J/(K.m$^3$)]
Used in
$C_{c1}$
Thermal capacitance part 1 [J/(m.K)]
$Q_A$
Thermal capacitance A transient thermal circuit [J/(m.K)]
$Q_{c,t}$
Thermal capacitance conductor transient (IEC 60853) [J/(m.K)]