Variable Sealing End In Case Of Hvi Conductors - dehn HVI Installation Instructions Manual

5.3.2 Variable sealing end in case of HVI Conductors

If the HVI Conductor is not connected to the earth-termination system, but to parts carrying lightning
voltage (e.g. capping of the roof parapet, ring conductor), Fig. 15 is decisive for the effective length of
the sealing end (see also Fig. 16, page 29 and Fig. 17, page 30).
No special installation conditions (direct connection) must be observed in the area below the separati-
on distance "s" of 17.5 cm (in air) on the earth connection element (see Fig. 15).
Length of the variable
sealing end (cm)
Variable sealing
end
HVI Conductor
with mechanical
fixing (Part No.
105 275)
Figure 15 Variable sealing end
Due to the variable sealing end and the resulting reduced length of the sealing end, no additional spa-
cer must be installed. The length of the variable sealing end is determined by multiplying the calculated
separation distance in s
Attention:
The variable sealing end can only be used for black HVI Conductors. When using a grey HVI
Conductor, the grey sheath must be removed in the sealing end range.
28
150
90
35
17.5
10
by the factor 2
air
Length "L" of the sealing end = separation distance in s
45 70
Equivalent separation distan-
ce "s" (in air)
air
Maximum
HVI Conductor
75
x 2