Riello UPS Sentinel Dual (High Power) (3.3 - 10 kVA) - Manual (Page 74)

74
U
SE
O
PERATING MODES
The mode that ensures maximum protection to the load is ON LINE mode (default), where the energy for the
load undergoes a double conversion and is reconstructed fully sinusoidal in output with frequency and
voltage set by accurate digital microprocessor control independently of the input (V.F.I.). *
The following modes can be set in addition to the conventional ON LINE double conversion operating
mode:
 ECO (LINE INTERACTIVE)
 SMART (SMART ACTIVE)
 STBYOFF (STAND-BY OFF)
The load is normally powered from the bypass in ECO mode, in order to optimize efficiency. If the mains
goes out of the admitted tolerances, the UPS switches to normal ON LINE double conversion operation.
About five minutes after the mains returns within tolerance, the load is once again switched onto the bypass.
If the user cannot decide which operating mode is the most suitable (ON LINE or ECO), this decision can be
left to SMART ACTIVE mode. In this mode, the UPS decides autonomously which mode to configure on
the basis of statistics collected on the quality of the mains power supply.
STAND-BY OFF mode is used for operation as a back-up unit:
when the mains is present, the load is unpowered while if a blackout occurs, the load is powered from the
inverter via the batteries.
R.E.P.O.
This isolated input is used to remotely switch off the UPS 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 the 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).