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

5.2 Measures to reduce the sepa-
ration distance "s" (HVI
Conductors installed outside the
supporting tube)
The required separation distance "s" can be
reduced if the current is distributed between
several down conductors, e.g. by installing
HVI long Conductors, in parallel. Since magnetic
®
interaction may occur if conductors are instal-
led in parallel, a minimum distance must be kept
downstream of the sealing end range/supporting
tube of the parallel HVI
tance > 200 mm is recommended.
It must also be observed that HVI
tors 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 long Conductors can be connec-
®
ted to the supporting tube by means of the fixing
set (Part No. 819 294).
Steps for installing HVI
side the supporting tube:
If an additional HVI
Â
installed inside the supporting tube, this must
be done after the HVI
installed outside the supporting tube (see 5.1,
page 10).
The locking screw on the side of the head of
Â
the supporting tube for the head piece of the
HVI long Conductor must be completely tigh-
®
tened (see also Figure 4, page 11). Installation
may not be possible if the screw protrudes too
far from the head of the supporting tube.
12
long
®
long Conductors. A dis-
®
long Conduc-
®
long Conductors out-
®
long Conductor is to be
®
long Conductors are
®
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.
fixing ring
connecting sleeve
Figure 5 Step 1 for installing a HVI
outsite the supporting tube
Position the connecting plate (four conductors)
Â
below 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 6 Step 2 for installing a HVI
outside the supporting tube
M8 screw
long Conductor
®
self-locking nut with ser-
rated bearing (15 Nm)
long Conductor
®