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Element B of two-part thermal circuit, insulation

Symbol
$Q_{B,i}$
Unit
J/(m.K)
Formulae
$\frac{\left(1-p_i\right) Q_i}{n_c}$long-term transients
$\frac{\left(1-p_i\right) Q_{it1}+p_i Q_{it2}}{n_c}+\frac{\left(\frac{T_B-\frac{T_1}{2n_c}}{T_B}\right)^2 \left(1-p_i\right) Q_{it2}}{n_c}$short-term transients
Related
$n_c$
Number of conductors in object
$p_i$
Factor apportioning the insulation
$Q_i$
Thermal capacitance of insulation [J/(m.K)]
$Q_{it1}$
Thermal capacitance of insulation, 1st portion (IEC 60853) [J/(m.K)]
$Q_{it2}$
Thermal capacitance of insulation, 2nd portion (IEC 60853) [J/(m.K)]
$T_1$
Thermal resistance between one conductor and sheath [K.m/W]
$T_B$
Element B of equivalent thermal circuit [K.m/W]
Used in
$Q_B$
Element B of two-part thermal circuit [J/(m.K)]