: 2.Coordination insulation
The rated surge voltage depends the surge voltage
category. sub-distributor
Installation location, e. surge
voltage arrestor must limit the voltage this a
smaller value.g.5 corresponds supply
line length 1.g. main distributor
Installation location, e.g. surge voltage category for example, for
a single-phase connection 230 network, the
minimum rated surge voltage 1.g.25 supply line (8/20))
Coordination insulation per 60664-1
TBS
Blitzschutz-Leitfaden
2018
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Chapter The internal lightning protection system
. the actual surge current smaller than
the nominal surge current, the response voltage and
hence also the protection level drops. devices
Measured pulse voltage (voltage resistance) the
resources (green line)
Protection level Up
of the OBO surge protection devices
(SPDs) (orange line)
Usable difference (e.
Required protection level for 230/400 equipment accordance with IEC 60364-4-443
Resource the infeed point the system
Resource part the fixed installation
Resource for connection the fixed installation
Resource requiring special protection
Installation location, e.5 kV.
The protection level surge voltage arrestor the
maximum voltage when the nominal surge current is
applied it
