Operation Modes; Normal Operation Mode Vfi (Voltage Frequency Independent); Sem Mode Operation (Super Eco Mode) - GE Digital Energy SitePro 400 VAC CESeries 7 Operating Manual

3.2

OPERATION MODES

3.2.1 Normal operation mode VFI (Voltage Frequency Independent)

Under normal conditions
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.

3.2.2 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,
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.
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 7.5-7).
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.
Modifications reserved
OPM_SPE_XXX_60K_60K_7GB_V010.doc
the load is
the Load is
Fig. 3.2.1-1 Block diagram normal operation mode
Fig. 3.2.2-1 Energy flow in SEM mode operation
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Operatine Manual SitePro 60 kVA