3.3. The voltage protection level can increase so
dramatically that the voltage resistance the terminal
device exceeded and the device damaged des-
pite the presence surge protection. The
best solution the local equipotential bonding. Complete shield
action against capacitive and inductive coupling can
only effective when the shield included with low
impedance both sides the equipotential bonding.
Shields are also extremely important.2 Installation data cable protection devices
If the cables are too long, voltage drop will occur
due the high inductance, which will have negative
impact the protection level the surge protection
device. achieve low voltage protection levels,
these surge protective devices must incorporated
as directly possible into the equipotential bonding
system. Long cable lengths should avoided.3.1 Equipotential bonding data cables
Unlike energy technology, data technology longit-
udinal and transverse voltages occur which must be
minimised using suitable arrestors with voltage-limiting
components.2.
3.
Device protected/telecom line
Surge protective device (energy technology)
Gas discharge arrestor (indirect shielding)
Gas discharge arrestor
Connection equipotential bonding
Equipotential busbar
Telecommunications line
Electric cable
Direct connection equipotential bonding (preferred)
Conductive shield the data cable
Phase
Neutral conductor
Protective conductor
Equipotential bonding data cables
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Chapter The internal lightning protection system
