Sealing End; Sealing End Range Of The Supporting Tube Based On The Example Of An Antenna - dehn HVI Series Installation Instructions Manual

5.3

Sealing end

The calculated separation distance "s"
from conductive/earthed parts has to be
maintained in the sealing end range.
No conductive or earthed parts such as metal con-
ductor holders, structural parts, reinforcement, etc.
(see 5.3.3, page 19) may be installed in the sealing
end range, for example:
At the supporting tube between the head piece
Â
and equipotential bonding connection element
(see 5.3.1).
Variable sealing end on the ring conductor/me-
Â
tal capping of the roof parapet (see 5.3.2, page
16)
Sealing end on the building's structure between
Â
the equipotential bonding connection element
and the earth connection element. (see 5.3.3,
page 19).
5.3.1 Sealing end range of the supporting
tube based on the example of an
antenna
The sealing end range ranges from the connecti-
on of the head piece to the equipotential bonding
spring element integrated in the supporting tube
(see Fig. 10, detail A and B) and can be assumed
to run along the entire GRP tube.
Due to the mechanical spring contact, acting as
an equipotential bonding element, the HVI
Conductor (semiconductive special sheath) is
connected to the supporting tube. To this end, the
supporting tube must be conductively connected
with the next equipotential bonding system of the
installation.
The conductive connection between the suppor-
ting tube and the metallic antenna standpipe is
established by means of e.g. a pipe clamp (Part
14
No. 105 360) (mechanical and electrical connec-
tion).
connection
of the head
piece
Detail A
equipotential
bonding element
Detail B
antenna
standpipe
connection to the
equipotential bonding
of the installation
Detail A:
connection of the
head piece
long
®
Figure 10 Sealing end range in the supporting tube
α α
s
supporting tube
HVI long Conductor
®
connection to the
earth-termination system
Detail B:
equipotential bonding
spring element
pipe clamp