This is the corrected transient temperature rise of conductor above ambient temperature.

The change in conductor resistance with temperature during the transient period results in time-variable conductor. Allowance for the variation of conductor loss with temperature results in the corrected temperature rise.

Symbol
$\Delta \theta_{\mathrm{a_{\mathrm{t}}}}$
Unit
K
Formulae
$\frac{\Delta \theta_{\mathrm{t}}}{\frac{- \Delta \theta_{\mathrm{t}} + \Delta \theta_{\mathrm{t_{\mathrm{\infty}}}}}{\beta_{\mathrm{c}} + \theta_{\mathrm{c}}} + 1}$
$\Delta \theta_{\mathrm{t}}$
$\Delta \theta_{\mathrm{t_{\mathrm{\infty}}}}$
$\theta_{\mathrm{c}}$
Used in
$\Delta \theta_{\mathrm{R_{\mathrm{t}}}}$
$\theta_{\mathrm{c_{\mathrm{t}}}}$