Section 5 - Samlexpower Evolution Series Owner's Manual

SECTION 4 |
TABLE 4.1 SYNCHRONIZATION ALGORITHM OPTIONS ON AC INPUT CONNECTIONS
AC Input Connection
EVO-1212F/ 1224F
AC Inlet (9, Fig 2.1)
EVO-1212F-HW/
1224F-HW
AC Input Terminals
(21,22,23 in Fig 2.3)
NOTES:
1. For programming details for parameter "SYNCHRONIZATION", please refer to Section 4.5.2.8 in EVO-RC-PLUS
Remote Control Manual
Transfer From Inverter Section to AC Input Source
4.4.2.1.3
When power from AC input source is made available, its voltage and frequency are monitored for 2 sec to check if
these are within the programmed limits. If yes, the output voltage of the Inverter Section is synchronized with the
AC input source. This synchronization process takes few seconds. Once synchronization is completed, the load is
transferred instantly (within 1 ms) to the AC input source at Zero Crossing of the voltage waveform for safer transfer
and for better protection of Transfer Relay contacts. The unit now operates in "Charging Mode" with the AC power
from the AC input source charging the batteries as well as providing power to the AC loads.
Transfer From AC Input Source to Inverter Section
4.4.2.1.4
When the unit is operating in "Charging Mode" with the AC input source charging the batteries as well as providing
power to the AC loads, the phase and frequency of the AC input source are tracked continuously. In case AC input
source fails or is disconnected, the inverter will be forced to transfer at voltage which is at the same phase and
frequency at which the AC input source had been disconnected. Load will be transferred to the inverter within 16ms
at zero crossing. The unit will now work in "Inverting Mode" and the batteries will start discharging.
4.5 BATTERY CHARGER SECTION
The Battery Charger Section of these units provide 2/3/4 stage charging with 7 programmable charging profiles as
detailed at Section 5.6. The same Isolation Transformer and the H-Bridge configuration of the Inverter Section are
used to work in the reverse direction, i.e. the AC input is stepped down and rectified to the programmed DC battery
charging voltage using Pulse Width Modulation (PWM) Control. That is why it is called a Bi-directional device. Further,
the charging voltages and currents are programmable to take care of a wide range of battery types like Lead Acid,
Nickel-Zinc (Ni-Zn) & Lithium Ion.
Important battery charging features are as follows:
• Adaptive Charging Control for 2 Charging Profiles out of the 7 profiles
• Dynamic Input Power Diversion Control
• Parallel charging through External Charge Controller
82 | SAMLEX AMERICA INC.
General Description & Principles of Operation
AC Input Source is Grid or
Inverter Generator
Programming
Parameter
SYNCHRONIZATION
(See NOTE 1)
Synchronization Algorithm Options
Option
0=Fine SYNCHRONIZATION
(Default)
AC Input Source is Generator
Programming
Parameter
Change to Option
(See NOTE 1)
Recommended
Option
"1=Coarse"