Page 107 - 35_DS702_E_2014_Lightning_Protection_Guide

The connection element is then screwed onto the conductor.
It is fixed by means of two threaded pins and is electrically
contacted. Finally, a self-adhesive heat-shrinkable sleeve is ap-
α α plied to the conductor by means of a hot air blower. This heat-
shrinkable sleeve provides additional mechanical protection
and protects the conductor end from the ingress of moisture,
thus preventing corrosion of the inner copper conductor.
s
HVI power Installation of the EB connection element
Conductor EB connection elements must be installed depending on the
type of HVI Conductor, installation conditions and sealing end
sealing
end range length according to the separation distance. More detailed
information can be found in the relevant installation instruc-
tions.
If a grey HVI Conductor is used, the additional grey sheath
must be removed to contact the semiconductive sheath un-
derneath it. After that, the EB connection element can be in-
stalled.
e.g. antenna
EB supporting tube with Use of HVI Conductors for protecting roof-mounted
air-termination rod
structures
Metal and electrical roof-mounted structures protrude from
the roof level and are exposed to lightning strikes. Due to
conductive connections into the structure via pipes, ventila-
tion ducts and electrical lines, partial lightning currents may be
Figure 5.2.4.11 Sealing end range injected into the structure.
The injection of partial lightning currents into the structure is
prevented by connecting an isolated air-termination system to
the insulated down conductor which ensures that the entire
electrical / metal equipment protruding from the roof is located
in the protected volume. The lightning current is led past the
structure to be protected and is distributed via the earth-ter-
mination system.

Installation of HVI Conductors in façades
It is often a special challenge to inconspicuously integrate a
down conductor while maintaining the required separation
distance s. In the past, this was achieved by using a round wire
which was fixed by DEHNiso spacers. This horizontal distance
Figure 5.2.4.12 HVI strip stripping tool is often not acceptable although it was required from a techni-
cal point of view. HVI Conductors can be directly installed on
or in façades and thus open up different design possibilities.
that the high-voltage-resistant insulation is stripped correctly. This innovative technology combines functionality and design
User-friendly tools are available for this purpose. and therefore is an important aspect of modern architecture.
If the grey HVI Conductor (exception: HVI light Conductor) is HVI Conductors allow to easily discharge the lightning current
used, the grey sheath must be removed by about 65 mm with- to the earth-termination system without having to maintain
out damaging the black sheath of the conductor underneath distances from metal and electrical parts.
it. After that, the outer sheath and the PE insulation are easily
and safely stripped by 35 mm using the HVI strip tool (Figure Use of HVI Conductors for transceivers
5.2.4.12) which ensures that the copper conductor under- Cell sites are often installed on rented roof space. The cell site
neath them is not damaged. operator and the building owner usually agree that the instal-

106 LIGHTNING PROTECTION GUIDE www.dehn-international.com