Dehn HVI long-Leitung Montageanleitung Seite 41

Variable sealing end on isolated ring conductors/metal cappings of the roof parapet
If several parts of an installation are to be protected, it is not advisable to lead the HVI
ductor from each air-termination system to the earth-termination system. The HVI
arriving from the air-termination system can be connected to e.g. an isolated ring conductor or to the
metal capping of the roof parapet. From this isolated ring conductor (metal capping of the roof para-
pet), several down conductors can be led to the earth-termination system. In this case, the partitioning
coefficient k is reduced due to the isolated ring conductor. As a result, the separation distance "s" is
c
reduced. HVI long Conductors (on a drum) can be used for this purpose (see Fig. 13 and 14, page 18
®
and instruction leaflet Publication No. 1851 (variable sealing end)).
The isolated ring conductor must be installed on spacers and concrete bases e.g. on the roof level. The
calculated separation distance "s" must be observed.
connection element
isolated ring conductor
spacer
Figure 13 Isolated ring conductor with HVI
variable sealing end
350 mm to max. 1500 mm (standard)
e.g. spacer with equi-
potential bonding
element and MV clamp,
aluminium, Part No. 105 275
concrete base
17 kg, Part No. 102 010
long Conductor
®
long Conductors
®
HVI long Conductor
®
connection to the
equipotential bonding
of the building
long Con-
®
17