Samlexpower Evolution EVO-2212 Owner's Manual page 71

SECTIOn 4 |
• transfer from inverter to grid / generator: As soon as qualified AC input power
from Grid / Generator is available, the inverter will exit Power Saving Mode and will
switch over to Normal Mode. This switch over is necessary for synchronizing the AC
output of the inverter with the AC input before transfer (Synchronization can not be
carried out with pulsing wave form during Power Saving Mode). After synchronization
is completed, the load is transferred to the Grid/Generator at zero crossing of the
voltage waveform.
4.8.5 off-line/on-line modes
on-line uPS (un-interruptible Power Supply) mode:
i
info
Description given below provides general capability of this function. for detailed
principle of operation and programming of Options 1 and 2, please refer to sub-
heading "ON-LINE / Off LINE uPS MODES" at page 22 in the Owner's Manual
for remote Control Model EVO-rC at Appendix A
On-line / Off-Line uPS Modes are programmed through remote Control EVO-rC by setting
"ONLINE MODE" [1=ON]. The Default Setting is Off-Line Mode [0=Off]. Please refer to sub-
heading "ON-LINE / Off LINE uPS MODES" at page 22 in the Owner's Manual for remote
Control EVO-rC at Appendix A.
On-line uPS Mode is suitable for installations where both Grid and Photovoltaic (PV) Solar
battery Charging System are available. It is also desirable in areas where Grid / Utility
Energy Rates are very high and use of supplementary battery based photovoltaic
power system is more cost effective. In this mode, un-interruptible AC power is provided
by utilizing batteries and the Inverter Section of EVO as the the PrIMAry DC-AC power
source. The Grid is the secondary / back-up AC power source. Even if qualified Grid AC input
(within the programmed voltage and frequency limits) is available, the EVO always operates in
"Inverting Mode" and AC output is provided by the Inverter Section as long as the battery is
in charged condition above the programmed value of "LOW VOLT ALArM" [(i) for 12V: 9.5V
– 12.5V / Default 11.0V (ii) for 24V: 19.0V – 25.0V / Default 22.0V] .
When the battery discharges to the programmed value of "LOW VOLT ALArM" [(i) for 12V:
9.5V – 12.5V / Default 11.0V (ii) for 24V: 19.0V – 25.0V / Default 22.0V], or lower and remains
at this, or below this threshold for continuous programmed period of "GS DETECT TIME"
(0-600 sec; Default 10 sec), the Transfer relay will be switched ON (energized) and the unit
changes over to "Charging Mode". Qualified AC input from the Grid is passed through to the
AC Output and at the same time, the Internal AC Charger starts charging the battery. If an
external Solar Charge Controller is also connected to the External Charging Terminals (3 and 4,
fig 2.1), the internal AC Charger will limit the charging current to a value = (Programmed Value
of Charging Current – Value of Current fed from the external solar charge controller).
When the battery has been re-charged either fully through complete, 3-Stage Charging algorithm
(Option 1) or, for a programmed time period (Option 2), the Transfer relay will be switched Off
(de-energized), charging will stop and the unit will change over to "Inverting Mode".
general Description & Principles of Operations
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