25
The UpSs supply output voltage from the internal static
bypass of each unit. observe the LCd screen of the
control panel for any warnings or error information.
measure the output voltage at the terminals of each UpS
separately to check that the voltage difference between
them is less than 1 v. If the difference is greater than 1
v, check the connection and the associated instructions.
•
If everything is correct, proceed. press the ‘on’ button
on all of the UpSs for more than 2 seconds and each
of them will start up. All of the UpSs will transfer to
‘normal mode’.
measure the output voltage at the terminals of each UpS
separately to check that the voltage difference between
them is less than 0.5 v. If the difference is greater than
1 v, the UpSs will need to be adjusted (contact
T.S.S.
).
•
If everything is correct, proceed. press the ‘oFF’ button
for more than 2 seconds on all of the UpSs and each of
them will begin to shut down the device.
Turn the input circuit breakers on the distribution or
manual bypass board to ‘on’. The output terminals on
the distribution board will be under potential through
the static bypass of the device.
•
press the ‘on’ button for more than 0.5 seconds on all
of the UpSs and each one of them will begin to start up
in order to finally leave the system in parallel operation
in ‘normal mode’.
•
Start the load or loads.
•
do not leave a floating UpS with respect to the
others. There must always be a connection
between the neutrals, either input or output. do not
open the input and output circuit breakers of a UpS at
the same time on the distribution board while the UpS
running. otherwise, a fault in the UpS may occur and the
connected loads may shut down
6.4. how To add a ups To a sysTem in parallel
operaTion or To a FunCTioning single
ups (only in 4 To 10 kva models).
•
To operate the parallel system, it is necessary to have a
manual bypass board for the parallel system.
In the event of not having one, the shutdown of the entire
system and the loads powered by it must be anticipated.
•
The steps to follow are for the addition of a device to
a system with two units. To incorporate a device into
a system with only one UpS, proceed in the same way.
•
The distribution board must have input and output
switches for each UpS, in addition to the one for the
manual bypass. otherwise, it will be necessary to
adapt the board or acquire a new one if it has not been
previously anticipated.
•
Since it is necessary to change the parallel bus
connection to incorporate the new device into the system
(cable with db15 connectors), it will be necessary to
switch the powering of the loads to the manual bypass.
proceed as follows:
press the ‘oFF’ button on all of the UpSs for more
than 2 seconds to shut down the inverter in all of
them. The audible alarm will sound for 1 second. The
devices that make up the current parallel system will
switch to ‘bypass mode’.
Switch the devices to manual bypass.
1.
Remove the mechanical lock on the distribution
board’s manual bypass switch or disconnector
and turn it to ‘on’.
Take into consideration that in ‘bypass mode’
(with the switch turned to ‘bypASS’), the
loads will be exposed to voltage and frequency
variations and cuts or micro-cuts in mains power, so,
if possible, it is recommended to choose a day with
lower probability of failure (days without
fluctuations, days without storms, etc.) and a certain
speed in the process.
Turn the input circuit breakers of each device to ‘off’.
Turn the input and output circuit breakers of the
board to ‘off’.
•
before incorporating the new TwIn RT2 into the system,
carry out the appropriate steps to leave it in the same
condition as the others (input switch turned to ‘off’).
•
Incorporate the new UpS to the system following the
procedure established in section 5.2.8.2 for connection
in parallel.
•
disconnect the communication bus between the first
and last device, and reconnect it including the new UpS.
The bus must be closed for proper operation.
•
Turn the input circuit breakers of each UpS on the
distribution board to ‘on’.
•
Turn the input circuit breakers of each UpS to ‘on’.
The output switches of each UpS on the distribution
board must be open.
The UpSs supply output voltage from the internal static
bypass of each unit. observe the LCd screen of the
control panel for any warnings or error information.
measure the output voltage at the terminals of each UpS
separately to check that the voltage difference between
them is less than 1 v. If the difference is greater than 1 v,
check the connection and the associated instructions.
•
If everything is correct, proceed. press the ‘on’ button
on all of the UpSs for more than 2 seconds and each
of them will start up. All of the UpSs will transfer to
‘normal mode’.
measure the output voltage at the terminals of each UpS
separately to check that the voltage difference between
them is less than 0.5 v. If the difference is greater than
1 v, the UpSs will need to be adjusted (contact
T.S.S.
).
•
If everything is correct, proceed. press the ‘oFF’ button
on all of the UpSs for more than 2 seconds and each of
them will begin to shut down the device.
Turn the output circuit breakers on the distribution board
to ‘on’. The output terminals on the board will be under
potential through the static bypass of the devices, the
same potential as the manual bypass line.
•
Turn the manual bypass switch or disconnector on the
distribution board to ‘off’ and reposition the mechanical
lock to prevent possible accidents
•
To prevent incorrect operations, it is necessary to
fit the mechanical lock of the manual bypass and
their fixing screws.
•
press the ‘on’ button on all of the UpSs for more than 2
seconds and each of them will start up, in order to finally
leave the system in parallel operation in ‘normal mode’.
SLC TWIN RT2
UnInTeRRUpTIbLe poweR SUppLy SySTemS (UpS)
USER MANUAL
