Variable Sealing End - dehn HVI Series Installation Instructions Manual

5.3.2 Variable sealing end

If the HVI long Conductor is not connected to the earth-termination system, but to parts carrying
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lightning voltage (e.g. metal capping of the roof parapet, ring conductor), Figure 12 is decisive for the
effective length of the sealing end (see also Fig. 13, page 17 and Fig. 14, page 18).
No special installation conditions must be observed in the area below the separation distance "s" of
17.5 cm (in air) on the earth connection element (direct connection).
Due to the routing of the HVI
common to establish a second sealing end if the separation distance "s" is ≥ 50 cm (in air).
Length
of the variable sealing end (cm)
150
100
35
Figure 12 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 (see Fig. 6 in installation instructions Publication No. 1811).
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long Conductor and the resulting reduced separation distance, it is not
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17.5
10
Maximum variable
sealing end
HVI long Conduc-
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tor
75
50 70
Maximum
HVI long Conductor
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Equivalent separation
distance "s" (in air)