Salicru SLC X-PERT 100, Руководство пользователя

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6.4.1. Verification of the parallel system.
After the installation of the hardware and configuration of the
units involved, it is necessary to verify the function of all of
them. To do so, the units need to be started in manual bypass
mode. The procedure is indicated below:
•
Set the MBCB switch of each unit involved to ‘On.’
•
Move the Normal/Bypass selector to the BYPASS position.
•
Set the RCB switch of each unit to ‘On.’
•
Follow the instructions shown on the front panel of each
unit until you see the following message: ‘STARTING FROM
MANUAL BYPASS-OPEN ALL MBCB SWITCHES.’
•
On the second row of the screen, the real configuration of
the parallel system will be shown.
The screen shows the numbers of the UPSs involved,
indicating with an M the MASTER device (normally the unit
with the lowest number), with an S the SLAVE device with
square brackets ‘ [ ] ’ the number of the UPS in particular, and
with a question mark ‘?’ that the unit is not communicating
with the rest. If there are no more units in the parallel system,
it would be indicated with a hyphen ‘-.’
When the screen shows OPEN MBCB SWITCH
instead of OPEN ALL MBCB SWITCHES, it means
that this particular unit is configured in single mode and not
parallel mode. The UPS must be configured in parallel mode
before continuing.
It is not possible for two or more units to become MASTER
of the system. Make sure that two or more units do not
have square brackets in the same number, since this would
indicate that the UPS is incorrectly configured within the
system.
•
Once the configuration of the units involved has been
verified, continue with startup after the OPEN ALL MBCB
SWITCHES message has appeared.
•
After this step, move the bypass selector of all units to the
NORMAL position. The system will take charge of the load
if n-1 units are in this position.
•
Move the last bypass selector to the NORMAL position.
•
The system will power the load in parallel once the
STARTUP END message appears.
6.4.2. Operating states of the redundant parallel system.
•
N units in normal operating mode:
Load powered by the inverter and possibility of a continuous
fault.
•
N-1 units in normal operating mode:
Load powered by the inverter and, in case of fault, transfer
to the bypass line.
•
Mains failure:
The load is powered by the batteries through the inverter.
•
Availability of n bypass lines:
Load powered by the bypass in case of at least two inverter
faults or overload.
•
Availability of n-1 bypass lines:
Load powered by the bypass in case of at least two inverter
faults or overload.
6.4.3. System behaviour.
The static and dynamic behaviour of the parallel system
improves with each individual unit since, thanks to the
redundancy, the total available power is higher than the rated
power of the system.
Overload .
The overload limit depends on the number of units connected
to the load: Imax=n·In. If the load exceeds this limit, a visual
and audible alarm is activated on the front panel of the UPS.
This alarm activates the thermal image algorithm, and after a
certain time, the load is transferred to the bypass (if available).
Short-circuit .
If a short-circuit in the output is confirmed, the system
automatically transfers the load to the bypass. If not, all of the
units will provide a current between 250% and 300% of the
rated current for 70 ms. If the short-circuit condition has not
been removed, the current provided will be 150% of the rated
current for 5 seconds.
6.4.4. Redundant parallel system startup.
6.4.4.1. Direct startup (in the case of 2 UPSs).
When the system consists of 2 units, it is possible to start the
system directly. To continue with the startup of a UPS, set the
RCB switch to ‘On’ and follow the procedures indicated on the
screen. Then the other UPS can be started normally by setting
the RCB switch to ‘On’ and following the procedure indicated
on the screen.
6.4.4.2. Startup in manual bypass (in the case of 2 UPSs).
In the case of two units, it is also possible to start the parallel
system from the manual bypass. If the UPS is in manual bypass,
check the two initial points of the procedure described below:
ˆ
Set the MBCB switch on the manual bypass of both units
to ‘On.’
ˆ
Move the bypass selectors.
ˆ
Set the RCB switch of both units to ‘On.’
ˆ
Follow the instructions on the front panel for each UPS
until the SET BYPS SWITCH message appears.
ˆ
Move the bypass selector to NORMAL: the UPS powers
the load.
ˆ
Move the bypass switch: the STARTUP END message
appears.
Attention.
When the OPEN ALL MBCB SWITCHES request appears, it
is necessary to set the MBCB switches on all of the UPSs and/or
those located in the external cabinets to ‘Off.’
6.4.4.3. Startup with manual bypass (in the case of n UPSs).
When there are more than two units, it is only possible to start
the parallel system from the manual bypass. Its purpose is to
connect all of the units in the load line at the same time. If the
units are already in manual bypass mode, it acts on the first
two points of the procedure described below:
X-PERT UNINTERRUPTIBLE POWER SUPPLIES (UPS) USER MANUAL