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3.6 Operating modes
The various equipment operating modes are described below.
setting
The operating mode is set when the UPS is installed; it may be changed subsequently but this should
always be done by a specialized technician.
3.6.1 On - line - factory setting -
load always powered by inverter, in the event of an input mains failure the load continues to
be powered from the inverter using the energy stored by the batteries.
On – line:
The load is always powered by the inverter, with stabilized voltage and frequency, using
the energy from the mains power supply (INPUT). If there is a fault in the INPUT, the
LIBRAPRO UPS will switch to the batteries in zero time and the batteries will supply
energy to the inverter to keep the load powered (for the backup time of the batteries).
When the INPUT is restored the batteries will be automatically recharged by the rectifier.
3.6.2 Standby-on / Smart active
load powered from the mains, in the event of an input mains failure the load is powered
from the inverter using the energy stored by the batteries.
In Standby On or smart active, the load is powered from the by-pass line (if the power
supply line is in the acceptance field); if there is a fault on the power supply line, the load
switches automatically onto the inverter, powered by the battery
Standby On:
the switch from inverter to by-pass line may be immediate (time set = 0) or delayed (up to
180 minutes). For the switch to take place, the by-pass line has to remain in the acceptance
field for the time set. In Standby On mode, the rectifier remains powered and keeps the
batteries charged. If the by-pass line voltage or the frequency go out of the acceptance
field, the load is automatically switched onto the inverter output. With Standby On
operation, the energy dissipated by the system can be reduced, leading to considerable
saving. Before using this function it must be ensured that, in the event of a mains outage,
the load powered can accept an interruption of the power supply of around 2-5 ms, and
that it can support any mains interference.
This operating mode is normally used for loads that are not particularly sensitive.
The letter N will be displayed on the second line of the BASIC MENU, near the
LIBRAPRO model.
Smart Active:
the UPS autonomously activates On-Line or Standby-On operation according to the
quality of the power supply (see the “PERSONALIZ. SMART ACTIVE OPERATION”
menu). When Smart Active mode is activated, the power supply is monitored for a few
minutes, after which, if the voltage has remained within the pre-set values, the output is
switched onto the by-pass line; otherwise the load remains powered by the inverter, while
the observation time is approx. one hour. After this time, provided there has been no
interference, the load switches onto the by-pass line; otherwise the logic starts monitoring
again for approx. one hour. The advantage of this operating mode is its efficiency, which
is greater than 98%.
SMART A will be displayed on the first line of the BASIC MENU, and the letter M will
appear in the second line of the BASIC MENU, near the UPS model.
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