Modifications reserved Page 13/99
OPM_SPE_XXX_10K_40K_8GB_V020.doc Operating Manual SitePro 10-15-20-30-40 kVA / S8
4.2 OPERATION MODES
4.2.1 Normal operation mode VFI (Voltage Frequency Independent)
Under normal conditions the load is
permanently powered by the inverter with
constant amplitude and frequency.
The rectifier, powered by the mains, supplies
the inverter and the battery-charger keeps the
battery fully charged.
The inverter converts the DC voltage in a new
AC sine wave voltage with constant amplitude
and frequency independently from the input
mains power.
Fig. 4.2.1-1 Block diagram normal operation mode
4.2.2 SEM mode operation (Super Eco Mode)
When the SEM mode is selected, and the
mains power is available, the Load is normally
powered through the Automatic Bypass.
When the mains voltage is detected out of the
prescribed tolerances, the Load is
automatically transferred to the Inverter.
When the Mains recovers, the Load returns to
the Automatic Bypass after a variable time
defined by the control unit.
Fig. 4.2.2-1 Energy flow in SEM mode operation
The SEM mode can be configured directly by the user for higher efficiency, considering the Mains
reliability and criticality of the Load.
The selection between the two operation modes “VFI mode and SEM mode”, or switching between
operation modes at required time, can be done through the UPS control panel (see Section 7.4 / SEM).
In case of Parallel System
SEM mode (Super Eco Mode) cannot be enabled for RPA Parallel System.
Attention: A single unit equipped with a RPA - Parallel board, must be considered as parallel, thus
disabling SEM.
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