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Ohmic steady-state temperature rise

Permissible steady-state temperature rise of the conductor due to joule losses.

Symbol
$\delta \theta_c$
Unit
K
Formulae
$\theta_c-W_d \left(\frac{T_A}{2}+T_3+T_{4iii}\right)$
Related
$T_3$
Thermal resistance of jacket [K.m/W]
$T_{4iii}$
Thermal resistance to ambient [K.m/W]
$T_A$
Element A of equivalent thermal circuit [K.m/W]
$\theta_c$
Temperature of conductor [°C]
$W_d$
Dielectric losses [W/m]
Used in
$\delta \theta_{SPK}$
Peak cyclic temperature rise [K]