DIN-rail power supply manufacturer
PULS has carried out extreme testing
of its QT40 3-phase units by
subjecting them to simulated
lightning strikes. The lightning test is
one of several procedures devised by
PULS to prove the durability and
functionality of its power supplies in
the harshest conditions.

The test was carried out using a
Marx generator producing a voltage
of 500kV over a distance of 0.5m.

This generated a series of man-made
lightning bolts of up to 4kA which
hit the power supplies in two separate
tests. The first strike was directed into
the housing of the unit while the
second strike hit the input (L1 – L3)
of the QT40. Despite being subjected
to such extreme conditions the power
supplies continued to work normally.