It should ensured that all supposed protection ele-
ments cables entering the building, such as
shields, rodent guards, etc.TBS
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Surge protection devices conduct the lightning current
in the incoming cables towards earth via the equipo-
tential bonding system., are connected the
equipotential bonding system such way to
carry lightning current.
Telecommunications line
Power
Frequency
Time
Characteristics galvanic coupling
TBS
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221
Chapter The internal lightning protection system
. Due the curve with waveform
10/350 μs, this type coupling short duration.
The coupled lightning current has high energy and a
high frequency
