40
SALICRU
Fig. 49.
Connection between the UPS and a battery
cabinet for 50-80 kVA equipments.
• For extended autonomy where
more than one module or
battery cabinet
is supplied, the connection will always be
in parallel between them and the unit (see
.
That is, a cable of the same colour, from the UPS negative to
the negative of the first battery cabinet and from this to the
negative of the second battery cabinet, and so on. Proceed
in the same way for the connection of the positive cable, for
the middle tap cable (N) and for the green-yellow earth con-
nection.
The connection of the batteries to the UPS is the same as
if it were a single unit, due to the fact that it belongs or is
connected to a parallel system, as each set of batteries is
connected directly to its UPS by default, irrespective of the
number of battery cabinets.
Danger of electric shock
. If, after start-up of the UPS,
the battery cabinet must be disconnected, a complete
shutdown of the unit must be performed. Open the battery dis-
connect switch in the battery cabinet and/or switch located in
the UPS. Wait at least 5 min. until the filter capacitors have
discharged.
5.2.7. Connection of the parallel bus
•
The communications line (COM) consists of a very
low voltage safety circuit.
To ensure the quality, it must be installed separately from
other lines that carry dangerous voltages (power distribution
line).
Parallel connection bus
UPS nº 1
•••
•••
UPS nº «N»
Fig. 50.
RJ45 connectors of the parallel communication bus.
•
Parallel connection bus
. Use the Ethernet cable with
RJ-45 connectors on both ends to connect up to 16 SLC
CUBE4 units. The parallel bus loop must be closed.
•
In addition to the communications bus, the parallel system
installation must be equipped with a board that has individual
input and output protection devices, as well as a manual bypass
with mechanical lock.