The precise process of a puncture arc is relatively difficult
to simulate due to electrodynamic phenomena which
accompany rapid changes in electric fields such as those which
accompany ionization processes. Using the static model to
simulate dynamic electric fields is not fully accurate, because
the processes that precede a disruptive discharge in a dielectric
medium distort the initial field resulting from the voltage
impulse. Therefore the shape of the cumulative electric field is
different than the initial field. Static simulation can, however,
help determine the areas under most electric stress in the
insulator.