BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 88 / 450

54733-10BA2L
1 – 88
02.2017
6 Electrical Installation Volume 1
Cable conduits that are not used must be closed by suitable, metal-
lic dummy plugs.
Special cable glands are required for reinforced cables. The cable
assembly is described in the installation instructions of the cable
conduit used.
In case of doubt, we recommend using screw fittings, dummy plugs
or adapters by BERTHOLD TECHNOLOGIES.
Cables and wires
Only use cables with diameters that are permitted for each cable
gland. The cables must have the following wire cross-sections:
– Power cord: 1mm
2
to 2.5mm
2
– Signal lines: 0.5mm
2
to 2.5mm
2
The cables used must be suitable for at least a temperature which
is 15° C above the maximum ambient temperature.
The cables must not be subjected to tensile stress, but have to be
installed strain-relieved. We recommend creating a cable loop in
front of the entry of the housing.
If there is a danger that the cable may be used as a stepladder, then
the cables must be installed protected, for example in conduits. Also
make sure that the cables that are connected to the detector are
laid without abrasion or kinks.
Stranded lead
The ends of multi-strand wires or fine wire lines (strands) may not
be tinned or soldered. Permitted variations are ferrules and direct
connection of the strand.
IMPORTANT
When installing fine wire lines in a terminal, individual wires often
get stuck at the edge of the terminal, are then pushed back and in
the worst case project over the insulated edge of the terminal.
Therefore, make sure that all multi-wire or fine wire lines are cov-
ered by the terminal and are clamped inside the terminal.
Grounding conductor
The grounding conductor has to be connected to the terminals
marked with PE. With interconnected detectors (multi-detector
operation) the PE may not be looped from one detector to another.
Therefore supply lines with PE have to be guided in a star-shaped
pattern from one terminal box to the individual detectors.
Potential equalization
Connect the detector to a equipotential busbar on site. The line on
this bar must be as short as possible.