21
This type of output power distribution will ensure that a
fault in any of the machines connected to the device that
causes a short circuit does not affect more than the line
that is faulty.
The remaining connected loads will have continuity as-
sured due to the tripping of the protection only in the line
affected by the short circuit.
5.2.3. Connection to external batteries (backup extension).
•
Failure to comply with the instructions in this
section and Safety Instructions EK266*08 carries
a high risk of electric shock and even death.
•
The battery protection of the device and of any accumulator
module is always by means of internal fuses that are not
accessible to the user.
•
IMPORTANT FOR SAFETY
: If batteries are installed
independently, the accumulator group must be fitted
with a bipolar circuit breaker or disconnect fuse of the size
indicated in Tab. 2.
Model
Rated battery
voltage
Minimum values,
fast type fuses
DC voltage
(V)
Current
(A)
SLC-6000-TWIN RT2 T UL
(12V x 16) = 192V
400
32
SLC-10000-TWIN RT2 T UL
50
Tab. 2.
Protection features between device and battery
module.
•
Before starting the connection process between
battery module or modules and device, check that
the device and loads are ‘Off’.
Also, when the batteries are installed by the user indepen-
dently, the protection fuse or isolator must be deactivated.
•
Connection of the battery module to the device is made by
means of a cable featuring polarised connectors at both
ends, which is supplied with the first one. Two connectors are
available for this purpose on the device and battery module.
Similarly, the battery modules feature two connectors that
allow the linking of modules in parallel.
•
Each battery module is independent for each device.
Two devices must not be connected to the
same battery module
.
Likewise, in parallel systems, with each device connected
to its battery module or modules, they should be considered
as single devices that are independent of each other.
•
Fig. 21 shows the connection of a 10kVA device in a rack
arrangement with two battery modules. For a larger
number, proceed in a manner similar to those shown in the
illustration.
Fig. 21.
Connection to battery modules.
5.2.4. Connection of the input earth terminal
(
)
and the
earth connection terminal
(
)
.
•
As the device has Class I protection against electric
shock, it is essential to install a protective earth con-
ductor (connect earth (
)). Connect this conductor before
supplying voltage to the input terminals.
•
Make sure that all of the loads connected to the UPS are only
connected to its earth connection terminal (
). Failure to
limit the earthing of the load or loads and battery module or
modules to this
single point
will create earth return loops
that will degrade the quality of the power supplied.
•
All terminals identified as an earth connection (
) are con-
nected to each other, to the earth terminal (
) and to the
device’s earth.
5.2.5. Terminals for EPO (emergency power off).
•
The UPSs have two terminals for the installation of an ex-
ternal emergency power off (EPO) output button.
•
The device is dispatched from the factory with its EPO cir-
cuit set to closed (NC) by default. In other words, the UPS
will cut the output power supply, emergency power off,
when the circuit is opened:
Either by removing the female connector from the socket
where it is inserted. This connector has a cable con-
nected as a jumper that closes the circuit (see Fig. 22-A).
Or by pressing the button external to the device belonging
to the user installed between the terminals of the con-
nector (see Fig. 22-B). The connection on the button must
be in the normally closed contact (NC), so it will open the
circuit when activated.
The reverse functionality can be selected through the com-
munications software and control panel.
Except for specific cases, we advise against this type of con-
nection in view of the purpose of the EPO button, since it will
not act upon an emergency request if either of the two ca-
bles that run from the button to the UPS is accidentally cut.
By contrast, this anomaly would immediately be detected
in a closed EPO circuit, with the inconvenience of an unex-
pected cut in the powering of the loads, but a guarantee of
effective emergency functionality.
•
To recover the normal operating state of the UPS, it is neces-
sary to insert the connector with the jumper in its receptacle
or deactivate the EPO button. The device will be operational.
SLC TWIN RT2 T
UNINTERRUPTIBLE POWER SUPPLIES (UPS)
USER MANUAL
