Cableizer ®

Thermal capacitance B transient thermal circuit

Symbol
$Q_B$
Unit
J/(m.K)
Formulas
$Q_{B,i}+Q_{B,s}+Q_{B,f}+Q_{B,ab}+Q_{B,j}+Q_{B,d}$Cableizer
$\left(\left(1-p_i\right) Q_i+\frac{Q_{sc}+Q_{sh}+p_j Q_j}{q_1}\right) \frac{1}{n_c}$IEC 60853
Related
$n_c$
Number of conductors cable
$p_i$
Apportioning factor insulation
$p_j$
Apportioning factor jacket
$q_1$
Ratio of losses screen bedding,screen serving
$Q_A$
Thermal capacitance A transient thermal circuit [J/(m.K)]
$Q_{B,ab}$
Thermal capacitance B transient thermal circuit, armour bedding [J/(m.K)]
$Q_{B,d}$
Thermal capacitance B transient thermal circuit, duct [J/(m.K)]
$Q_{B,f}$
Thermal capacitance B transient thermal circuit, filler [J/(m.K)]
$Q_{B,i}$
Thermal capacitance B transient thermal circuit, insulation [J/(m.K)]
$Q_{B,j}$
Thermal capacitance B transient thermal circuit, jacket [J/(m.K)]
$Q_{B,s}$
Thermal capacitance B transient thermal circuit, screen/sheath [J/(m.K)]
$Q_i$
Thermal capacitance insulation [J/(m.K)]
$Q_j$
Thermal capacitance jacket [J/(m.K)]
$Q_{sc}$
Thermal capacitance screen [J/(m.K)]
$Q_{sh}$
Thermal capacitance sheath [J/(m.K)]
Used in
$M_0$
Coefficient M partial transient temperature rise [s]
$N_0$
Coefficient N partial transient temperature rise [s$^2$]