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6.3. OPERATING PROCEDURE FOR A PARALLEL SYSTEM
(ONLY IN 4 TO 10 KVA MODELS).
•
In parallel systems, check that the programming of Output 2
is the same on all of them to avoid conflicts.
•
The operating procedure established here is for devices
with a configuration determined by factory default.
•
Check that the load or loads and/or the output circuit
breakers on the distribution board are ‘Off’.
•
Turn “On” the input circuit breakers on the distribution or
manual bypass board and those on each UPS in 4 to 10 kVA.
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 using the
following procedure:
1.
Remove the mechanical lock on the distribution
board’s manual bypass switch or disconnector and
turn it to ‘On’.
2.
Remove the protective cover of the manual bypass
switch, which is located at the back of each unit,
and turn all of the switches to ‘BYPASS’.
Take into consideration that in ‘Bypass mode’ or
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’ and
manual bypass switch without protective cover turned to
‘BYPASS’).
•
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’.
Turn the internal manual bypass switch of each UPS to UPS.
The output switches of each UPS on the distribution board
must be open.
Fit the switch lock cover of each UPS
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.
).
USER MANUAL
