Cableizer ®

Thermal capacitance B transient thermal circuit, insulation

Symbol
$Q_{B,i}$
Unit
J/(m.K)
Formulas
$\frac{\left(1-p_{i}\right) Q_{i,t}}{n_{c}}$long-term transients
$\frac{\left(1-p_{i}\right) Q_{i,t1}+p_{i} Q_{i,t2}}{n_{c}}+\frac{\left(\frac{T_{B}-\frac{T_{1}}{2n_{c}}}{T_{B}}\right)^2 \left(1-p_{i}\right) Q_{i,t2}}{n_{c}}$short-term transients
Related
$n_{c}$
Number of conductors cable
$p_{i}$
Apportioning factor insulation
$Q_{i,t}$
Thermal capacitance insulation (IEC 60853) [J/(m.K)]
$Q_{i,t1}$
Thermal capacitance insulation, 1st portion (IEC 60853) [J/(m.K)]
$Q_{i,t2}$
Thermal capacitance insulation, 2nd portion (IEC 60853) [J/(m.K)]
$T_{1}$
Thermal resistance conductor—sheath [K.m/W]
$T_{B}$
Thermal resistance B transient thermal circuit [K.m/W]
Used in
$Q_{B}$
Thermal capacitance B transient thermal circuit [J/(m.K)]