Measures To Reduce The Separation Distance "S; (Hvi Conductors Installed Outside The Supporting Tube) - dehn HVI Installation Instructions Manual

5.2 Measures to reduce the separati-
on distance "s"
(HVI Conductors installed outside
the supporting tube)
The required separation distance "s" can be re-
duced if the current is distributed between several
down conductors, e.g. by installing HVI Conduc-
tors in parallel. Since in this case magnetic inter-
action may occur, a minimum distance must be
maintained downstream of the sealing end range/
supporting tube of the HVI Conductors installed
in parallel. A distance > 200 mm is recommended.
It must also be observed that HVI Conductors
must be connected to distant points such as an
isolated ring conductor or an earth-termination
system. If these measures are taken, the current is
almost evenly distributed.
Up to four HVI Conductors can be connected to
the supporting tube by means of the fixing set
(Part No. 819 294).
Steps for installing HVI long Conductors out-
side the supporting tube:
The locking screw on the side of the head of the
Â
supporting tube for the head piece of the HVI
long Conductor must be completely tightened
(see also Fig. 5, page 21). Installation may not
be possible if the screw protrudes too far from
the head of the supporting tube.
Put the fixing ring with the four slotted conduc-
Â
tor holders for the sealing end on the top edge
of the connecting sleeve through the head of
the supporting tube or from below through the
supporting tube and pre-mount it by means of
the M8 screw. In this process, observe the posi-
tion of the top edge of the connecting sleeve!
22
fixing ring
connecting
sleeve
Figure 6 Step 1 for installing a HVI long Conduc-
tor outside the supporting tube
Insert the connecting plate (four conductors)
Â
through the head piece of the supporting tube
and correctly position it via the long hole.
Tighten the self-locking nut with serrated bea-
Â
ring located on the side of the supporting tube
and properly connect the connecting plate to
the head of the supporting tube (tightening tor-
que of 15 Nm).
long hole
Figure 7 Step 2 for installing a HVI long Conduc-
tor outside the supporting tube
Bring the square of the connection element of
Â
the pre-assembled HVI long Conductor to be
installed outside the supporting to the connec-
top edge of the
connecting sleeve
Ø 60 mm
M8 screw
self-locking nut with
serrated bearing (15 Nm)