Surge voltages often destroy electronic equipment and systems. But we expect permanent availability - be it simply for reasons of higher productivity at the work place. A comprehensive concept for surge voltage protection, which not only encompasses the power supply, but also all other circuits of the equipment to be protected, helps to avoid costly damage and system down time.
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A circuit works at the designated voltage without
disturbance. A damaging voltage is any voltage increase which leads to
an exceeding of the tolerance threshold of the nominal voltage. This includes
transient surge voltages arising as a result of switching operations and
lightning discharge, and inductive, galvanic or capacitive coupling in
an electric system. Transient surge voltages have very fast rise times
of a few µs and relatively slow decay times ranging from several 10 µs
to several 100 µs.
Damage as a result of surge voltage can be avoided by very quickly short circuiting the conductors in which such high voltages occur with the equipotential bonding, but only for the moment in which the surge volt-age is present. This is done with components such as surface discharge arresters, gas-filled surge voltage arresters, varistors and suppressor diodes. Depending on the application, they are available individually or in combination circuits as surge protection devices and are connected between the active conductors of the operating circuit and ground.
All surge voltage protection devices from PHOENIX CONTACT for power supply, measurement and control circuits, and for data and telecommunications interfaces are collectively called TRABTECH (Transient Absorption Technology).
