Samlexpower G4-2012A Owner's Manual - Section 7 |
SAMLEX AMERICA INC. | 41
SECTION 7 |
Setting Menu and
display Screens
upper and lower voltage limits is detected, the Transfer Relay is
energized, the AC input is bypassed to the AC output to power the loads
and the unit will start charging the batteries connected to it.
The lower limit of the AC input voltage at which the load is automatically
transferred to the inverter can be programmed from 80 ~ 95 vAC. The
default setting is 85 vAC.
SCReen 3
High Voltage Transfer =
130 ~ 140 VAC (Default = 132 VAC) - In steps of 1V
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The unit is designed to work as an Un-interruptible Power Supply (UPS).
As explained above, the unit always starts in the Inverter Mode. If on
system power up, appropriate AC input power within the programmed
upper and lower voltage limits is detected, the Transfer Relay is
energized, the AC input is bypassed to the AC output to power the loads
and the unit will start charging the batteries connected to it.
The upper limit of the AC input voltage at which the load is automatically
transferred to the inverter can be programmed from 130 ~ 140 vAC. The
default setting is 132 vAC.
SCReen 4
battery boost (Absorption) Voltage =
12V battery: 14 ~ 16V (0.1V Steps); Default: 14V
24V battery: 28 ~ 32V (0.2V Steps); Default: 28V
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SCReen 5
battery Float Voltage =
12V battery: 13 ~ 15V (0.1V Steps); Default: 13.8V
24V battery: 26 ~ 30V (0.2V Steps); Default: 27.6V
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Depending upon the type of battery and the manufacturers’
recommendations, the Boost (Absorption) and the Float voltages can be
programmed as follows using the above two screens:
Parameter
12v version
24v version
Programmable
Range
Default
Programmable
Range
Default
Boost
(Absorption)
voltage
14 to 16 vDC
14.4
vDC
28 to 32 vDC
28.8
vDC
Float
voltage
13 to 15 vDC
13.8
vDC
26 to 30 vDC
27.6
vDC
SCReen 6
bulk Charging Current =
10 ~ 80A, each step 10A (Default = 10A) for G4-2012
bulk Charging Current =
10 ~ 70A, each step 10A (Default = 10A) for G4-2524 and G4-3524
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The maximum charging current of a battery is normally limited to 10%
of the Ah capacity of the battery at the 20 hour discharge rate C
20
.
very high charging current will not return the full capacity and also may
damage the battery plates due to overheating. The maximum permissible
charging current will depend upon the design of the battery. Check with
the manufacturer of the battery to confirm the maximum allowable
charging current. The charging current can be programmed as follows:
Parameter
12v version
24v version
Programmable
Range
Default
Programmable
Range
Default
Bulk
Charging
Current
10 to 80A
(Steps of 10A)
10A
10 to 70A
(Steps of 10A)
10A
Please note that if an external charging source is also used to charge the
batteries at the same time in parallel with the internal AC charger of the
unit, the charging current of the internal AC charger will be controlled so
that the total charging current of the external charger and the internal
charger is = the programmed charging current. For example, if the
programmed charging current is say 60A and the charging current of
the external charger is 30A, the internal AC charger will output only 30A
(Programmed setting of 60A – external charging current of 30A = 30A).
Similarly, if the programmed setting is say 30A and the external charger
is 50A, the internal AC charger will not provide any charging. Please
read more details on charging through external charger under heading
"Parallel Charging of Batteries Through External Charger, page 15."
SCReen 7
battery temperature compensation =
- 3.0 ~ -5.0m V / °C / Cell (Default = - 4.0 mV / °C / cell)
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The chemical reactions inside the battery change with temperature. The
cell voltage has a Negative Temperature Coefficient - the cell voltage
drops with increase in temperature. Normally, the battery voltages are
specified at a particular temperature, e.g. 25°C. G4 units come with
Battery Temperature Sensor Model No. BTS-G4 (Fig 2.4, page 8) that
senses the battery temperature & modifies the output voltage of the
charger accordingly.
The Temperature Coefficient can be programmed from -3.0 m v / °C /
cell to -5.0 m v / °C / cell. The default value is -4.0 m v / °C / cell for the
sensor BTS-G4.