Cableizer
Log in

Coefficient a for partial transient temperature rise

This is the coefficent $a_0$ used for calculating cable partial transient temperature rise acc. to IEC 60853-2.

Symbol
$a_0$
Unit
1/s
Formulae
$\frac{M_0+\sqrt{{M_0}^2-N_0}}{N_0}$
Related
$M_0$
Coefficient M for partial transient temperature rise [s]
$N_0$
Coefficient N for partial transient temperature rise [s$^2$]
Used in
$\alpha_t$
Conductor to surface attainment factor
$\Delta \theta_{c,t,o}$
Transient temperature rise of conductor by ohmic losses [K]
$T_{a0}$
Apparent thermal resistance a [K.m/W]