Arc fault clearing time calculator

*The following calculator is for reference only.

$$ Time\ t=\frac{k_e\times l_r}{{l_f}^{1.5}} $$
ke , Constant based on acceptable volume damage
lr , Current rating of the switchboard in Amps
Prospective fault current in kA
lf (kA), 30% 0f Prospective fault current
time t (seconds) , Maximum arcing fault clearing time