Samlexpower Evolution Series - Page 91

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SECTION 5 | Battery Charging in Evolution™ Series
battery voltage increases above the value set by parameters ABSORP VOLTAGE / FLOATING VOLTAGE / EQUALIZE
VOLTAGE, the PWM “Duty Cycle” is reduced that leads to lower short circuit current of the Secondary Winding.
This will reduce the voltage of the induced pulses and consequently, reduce the value of the charging current pulses.
Reduced value of charging current pulses will reduce the battery voltage back to the value set by ABSORP VOLTAGE /
FLOATING VOLTAGE / EQUALIZE VOLTAGE
5.1.2.6 Battery Charging Proles
7 programmable types of 2/3/4 Stage Charging Proles are available. Please see details under Section 5.6
5.2 DYNAMIC AC INPUT CURRENT DIVERSION CONTROL BETWEEN AC PASS THROUGH
CURRENT AND BATTERY CHARGING CURRENT
EVO Models have very powerful Battery Charger Section that will require very high AC input current from the AC
input source (See Table 5.1).
TABLE 5.1 CHARGING CURRENTS AND PASS THROUGH LOAD CURRENTS
Rated Charging
Current
Maximum Pass Through
Load Power and Current
Max. DC Side
Charging Current
Equivalent AC Side
Charging Current
Pass Through
Power
Pass Through
Amps
EVO-1212F &
EVO-1212F-HW
60A 11.2A 1200 VA 10A
EVO-1224F &
EVO-1224F-HW
40A 11.2A 1200 VA 10A
When batteries are being charged at or near the maximum value of charging current (See TABLE 5.1) and the pass through
load current increases, the AC input supply circuit breaker may trip if the combined value of the AC side charging current
(equivalent to the DC side charging current) and the pass through load current exceeds the AC input supply circuit breaker
capacity. This situation is prevented by “Dynamic AC Input Current Diversion Control between AC Pass through Current
and Battery Charging Current”. This is accomplished through appropriate setting of programmable parameters “GRID
MAX CURRENT”. Optional Remote Control Model EVO-RC-PLUS will be required for the above setting [Please refer to
Section 4.5.2.2 of the EVO-RC-PLUS Remote Control Manual].
“GRID MAX CURRENT” (Default = 20A) should be set equal to the Ampere rating of the external AC input supply
breakers. During Battery Charging Mode, if the AC pass through load current is increased resulting in the net AC input
current increasing by 1A more than the programmed “GRID MAX CURRENT” for 1 sec, the EVO will automatically
reduce the charging current to ensure that the equivalent AC Side Charging Current + Pass Through Load
Current is not more than the set value of “GRID MAX".
i
INFO
As explained above, if the net AC input current is 1A more than the value of GRID MAX CURRENT for 1 sec,
the AC side charging current is clawed back to ensure that GRID MAX CURRENT value is not exceeded. If
the value of pass through load current increases to a value of 1A more than the programmed value of GRID
MAX CURRENT for 5 sec, input over current protection will be activated based on option to either transfer
to Inverting Mode or to shut down in FAULT MODE [Refer to details of these 2 options under parameter
“INPUT OC PROTECT” at Section 4.5.2.10 in the EVO-RC-PLUS Owner’s Manual]