Cableizer
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Factor $h$ for emergency load

This factor $h_{em}$ is used to calculate $I_{em}$.

It is the factor between the constant current applied to the cable prior to the emergency loading $I_{ss}$ (= $I_c$) to the sustained (100% load factor) rated current $I_R$ for the conductor to attain, but not exceed, the standard maximum permissible temperature $\theta_{max}$.

Symbol
$h_{em}$
Formulae
$\frac{I_{ss}}{I_R}$
Related
$I_R$
Transient conductor current [A]
$I_{ss}$
Steady-state current before transient [A]
$\theta_{max}$
Temperature of conductor at end of emergency loading [°C]
Used in
$I_{em}$
Emergency load current [A]