Salicru SLC ADAPT2 Series User Manual page 20

4.3.3.2. Battery status.
This mode is activated in the event of any fault in the AC mains,
in which the PFC-rectifier switches its AC mains input power
to the battery. The inverter, powered from the batteries, sup-
plies power to the critical load. This automatic transition from
"Normal Mode" to "Battery Mode" is performed without any
interruption of the output voltage.
When the AC mains voltage returns, "Normal Mode" is auto-
matically reset without any intervention.
AC input
Static bypass
Bypass
PFC rectifier
AC input AC / DC
BAT / DC
Rectifier

DC / DC Battery

Charger
Batteries
Fig. 14. Flowchart in Battery status.
If there is a failure of the AC input power for an extended
period of time, the battery may reach the end of backup
-EOD- and the inverter will switch off, leaving the critical loads
without power. If the "Auto Recovery after EOD" (factory de-
fault) UPS setting is set, the device will restart after the set time
after the AC power is restored.
4.3.3.3. Bypass state.
If the inverter overload capacity is exceeded in "Normal Mode",
or in cases where the inverter-PFC-rectifier set can not supply
power to the load for any reason, including manual switch-over,
the "Bypass Mode" will be activated automatically without in-
terruption of service at the output.
AC input
Static bypass
Bypass


PFC rectifier
AC input AC / DC
BAT / DC
Rectifier
DC / DC Battery

Charger
Batteries
Fig. 15. Flowchart in Bypass status.
If the inverter is not synchronised with the bypass, this transi-
tion will be made with a short interruption at the output of a
few milliseconds to avoid the occurrence of high current peaks
due to the paralleling of non-synchronised alternating voltage
sources. The time of this interruption is variable, the typical
value being less than ¾ parts of the input signal cycle (less than
15 ms for 50 Hz and 12.5 ms for 60 Hz).
20
Manual bypass
 
Inverter
AC output
DC / AC
Connection strips between
phases for mains.
Manual bypass


Inverter
AC output
DC / AC

Connection strips between
phases for mains.
4.3.3.4. Manual Bypass status (external or optional).
If the UPS requires intervention due to breakdown or for main-
tenance (for example, because an anomaly has been detected
in a power module, the bypass or the LCD screen), there is the
possibility of continuing to supply the loads through the internal
manual bypass (maintenance bypass).
When the UPS is operating in "Manual Bypass Mode"
(maintenance or repair period), the connected equip-
ment is not protected against power cuts or micro-cuts, over-
voltages, voltage and/or frequency variations, etc., since it is
being supplied directly from the commercial AC mains.
DANGER: During manual bypass mode, the input,
output and bypass terminals (version B) are live even if
all modules are switched off.
It is recommended in this operating mode:
Remove the fastening screws of all power, control and by-
•
pass modules.
Slightly pull the handles on each one until they are pro-
•
truding by about 4-5 cm from their housing in order to en-
able them to be unplugged from their connector located on
the backplane of the device.
Before any change of operating mode and after carrying out the
possible corrective actions, it is necessary to correctly insert the
modules to their original position and fix them with their screws.

Manual bypass
AC input
Static bypass
Bypass
PFC rectifier
AC / DC
AC input
BAT / DC
Rectifier
DC / DC Battery
Charger
Batteries
Fig. 16. Flowchart in manual bypass status (external or
optional maintenance bypass).
4.3.3.5. Status - ECO mode.
This is a special operating mode, activated in the configuration,
to improve the efficiency of the system. The load will be fed
directly from the AC mains through the bypass line, provided
the voltage and/or the input frequency are acceptable. The in-
verter that is in Standby mode will start up and power the load
whenever the voltage and/or frequency of the commercial AC
mains goes outside the established nominal margins. The per-
formance in the ECO Mode can reach up to 98%.


Inverter
AC output
DC / AC
Connection strips between
phases for mains.
SALICRU