In
these cases, the sources interference must re-
moved suitable line filters fitted.1. the electric strength
(Ûr/V) electrical system exceeded, this will
lead malfunctions even permanent destruction. Surges are several times (factor: K/ÜS) above
the permissible mains voltage.
Voltage dips various duration
Harmonics caused slow and rapid voltage fluctu-
ations
Transient surge voltages
Switching surges
Lightning surges
Range within surge protective devices are used
Types surge voltage
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14
Chapter General introduction
.2 Risk buildings and equipment
Buildings and equipment are risk not just from dir-
ect lightning strikes, but also from the surges that can
occur two kilometres away from lightning
strike.
Weak and frequent permanent surges are triggered by
high-frequency interference and line disruptions.2. Suitable lightning
and surge protection systems are needed protect
against energy-rich switching lightning surges in
buildings and equipment
