Riello UPS Sentinel Dual (High Power) (3.3 - 10 kVA) - Manual (Page 58)

58
U
SE
M
ODES OF OPERATION
The mode that gives the load maximum protection is ON LINE mode (default), where the energy intended for
the load undergoes a double conversion and is reconstructed on the output in a perfectly sinusoidal way with
frequency and voltage fixed by the precision digital control provided by a microprocessor fully independently
of the input (V.F.I.). *
Besides the traditional ON LINE double conversion operating mode, it is also possible to set the following
modes:
 ECO (LINE INTERACTIVE)
 SMART (SMART ACTIVE)
 STBYOFF (STAND-BY OFF)
For optimized efficiency, in ECO mode, the load is powered normally from the bypass. If the mains exits from
its specified tolerances, the UPS switches to the normal ON LINE double conversion operating mode. About
five minutes after the mains has returned inside tolerance, the load is again switched to bypass.
Where a user is unable to decide between the most suitable operating mode (ON LINE or ECO), he can leave
the choice to SMART ACTIVE mode in which, in relation to statistics regarding the quality of the mains power
supply, the UPS autonomously decides which mode to configure itself in.
Finally in STAND-BY OFF mode, operation is as a back-up device:
with mains line present, the load is powered down, whereas when a black-out occurs the load is powered by the
inverter through the batteries.
R.E.P.O.
This isolated input is used to switch off the UPS remotely in an emergency. Any “Remote Emergency Power
Off” (R.E.P.O.) switch that is normally closed must be connected to the connector located at the back of the
UPS.
The UPS is supplied ex-works with the R.E.P.O. terminals short circuited: remove the short circuit if this
contact is connected to the auxiliary of a remote emergency switch.
The R.E.P.O. circuit is self-powered with SELV type circuits. No external power supply voltage is therefore
required. When it is closed (normal condition) there is a current of 10mA max.
P
ROGRAMMABLE AUXILIARY SOCKET
(
POWER SHARE
)
The UPS is provided with an output socket that allows the automatic disconnection of the load applied to it
under certain operating conditions. The events that determine the automatic cut-out of the Power share socket
can be user-selected by means of the configuration software (see paragraphs Configuration software and UPS
Configuration).
It is possible for example to select cut-out after a certain time of operation from battery, or on reaching the end
of battery discharging prealarm threshold, or in the event of an overload.
*
The rms value of the output voltage is fixed by accurate microprocessor control independently of the input voltage
while the frequency of the output voltage is synchronized (within a user-selectable tolerance) with that of the input to
enable use of the bypass. The UPS will desynchronize outside of this tolerance, returning to nominal frequency, and the
bypass can no longer be used (free running mode).