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tem of the building (Figure 5.2.4.6). DEHNcon-H, HVI light
Figure 5.2.4.6 Connection of DEHNcon-H (HVI light Conductor I)
to the earth-termination system
Figure 5.2.4.7 Protection of a residential building by means of
DEHNcon-H (HVI light Conductor III)
Figure 5.2.4.8 Protection of a biomethane plant by means of a HVI
Conductor I
104 LIGHTNING PROTECTION GUIDE
Conductor III with a sealing end that must be established on
site is used if the air-termination system is to be connected
to other parts (e.g. connection to the eaves). The separation
distance at the connection point is s ≤ 0.175 m in air or is
s ≤ 0.35 in case of solid material (Figure 5.2.4.7).
HVI Conductor (s ≤ 0.75 m in air, s ≤ 1.5 m in case of
solid material)
The standard HVI Conductor offers a wide range of installation
options. For example, it protects large roof-mounted structures,
antennas and masts including information technology equip-
ment against direct lightning strikes. Moreover, this conduc-
tor can be routed up to the earth-termination system. If this
is not required, it can be connected to existing conventional
lightning protection systems (elevated / isolated ring conduc-
tor). Depending on the field of application, two types (pre-
assembled) are available:
¨ HVI Conductor I
¨ HVI Conductor III
HVI Conductor I is used if the air-termination system of the
external lightning protection system is directly connected to
the earth-termination system of the building (Figure 5.2.4.8).
HVI Conductor III with a fixed sealing end and a sealing end to
be established on site is typically used where the total length
cannot be exactly determined at the design stage. It is also
used if e.g. several parts of the structure to be protected are
jointly connected to the earth-termination system of the build-
ing via an elevated / isolated ring conductor (Figure 5.2.4.9).
Connection to the equipotential bonding system of the build-
ing (functional equipotential bonding) is required to establish
the sealing end of the HVI Conductor.
HVI long Conductor (s ≤ 0.75 m in air, s ≤ 1.5 m in case
of solid material)
Due to unknown and constantly changing building situations,
the exact lengths of HVI Conductors for new buildings or build-
ings in need of renovation can frequently not be determined at
the design stage of a lightning protection system. Therefore,
the HVI long Conductor can be assembled on site and is avail-
able on a reel with a length of 100 m. The installer determines
the lengths, strips the conductor and fixes the sealing ends
on site.
Connection to the equipotential bonding system of the build-
ing (functional equipotential bonding) is required to establish
the sealing end of the HVI long Conductor.
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