Vertiv Liebert S600E - Page 77

USER MANUAL-S600E
76
S600E
Use the following procedures to switch the UPS on when it is in the fully switched off state.
1. Confirm that all the external maintenance bypass switches are in the off position. Ensure that the internal
maintenance bypass switch Q3 is in the off position, and that the input cables and copper bars and the parallel
cables are connected securely.
2. Close all the bypass input switches. Close Qm
3. Close the UPS bypass input switch Q2, rectifier input switch Q1, output switch Q4 and all external output isolating
switches (if any) in that order.
At this point, the system is switched on.
4. Press the UPS power buttons one by one to start the respective inverters.
Operating Procedures in Maintenance Bypass Mode
This operation will transfer the load from the UPS power supply protection state to direct connection with AC input bypass
state.
1. Remove the maintenance bypass switch baffle retaining screws, rotate the baffle upwards until it is locked in
position, and then fasten the retaining screws. Refer to Figure 5-13.
At this point, the system Interlock function has been activated and the UPS will transfer to internal bypass mode;
you should confirm that the UPS has been transferred to internal bypass mode.
2. After confirming, close the maintenance bypass switch Q3.
3. Disconnect the output switch Q4. At this point the load is powered by the maintenance bypass.
4. Unplugging the REPO terminal deactivates the rectifier, inverter, static switch and battery, but does not affect the
maintenance bypass power supply to the load.
5. When the UPS is equipped with an external battery, set the corresponding external battery switch to the off
position until all the UPS modules have been disconnected from the batteries.
1.
These
procedures
result
in
mains
voltage
being
applied
to
the
U
PS
output
terminals.
2. If any loads are connected to the UPS output terminals, check with the user that it is safe to apply power. If the load is not
ready to receive power, please disconnect the downstream load switch, and apply a warning label at the load connection point.
To
avoid
generating
spurious
fault
messages,
whenever
it
is
necessary
to
switch
the
maintenance
bypass
switch
to
the
on
or
off
position, the operation must be completed within three seconds.
If the UPS system consists
of more then 2 UPS modules in parallel, and the load capacity exceeds the single module capacity,
do not use the internal maintenance bypass switch.
When the UPS is in maintenance bypass mode, the load is not pro
tected against abnormalities in the mains power
supply.
In maintenance mode, the load is fed directly by the mains power
instead, of the pure AC power from the inverter.
Before
performing
this
procedure,
you
should
check
the
LED
information
first,
and
make
sure
the
bypass
is
normal
and
synchronized with the inverter. Failure to do so may result in a brief interruption in the power supply to the load.
Caution: risk of interruption of power supply to load