Dimensions Unlimited
6
3.2 Features
3.2.1 Battery Charger – “B3” Option:
External power 120 VAC, 60 Hz is applied
as explained in section 3.1.2 The internal transfer switch automatically turns the DC to
AC inverter OFF and turns the three-step built-in battery charger ON. The battery
charger cannot be defeated at this time and will engage even if the inverter has been
set OFF manually. SPSs with the three-step battery charger feature require the transfer
switch “T” option to operate.
The 3-steps of the charging process are as follows:
Bulk mode:
Charging current is passed through the batteries until a factory set
acceptance voltage limit is reached. The charger’s maximum output and/or the state of
charge of the batteries determine the amount of current.
Acceptance mode:
Charging continues with the voltage held at the accept voltage
until current flow decreases to the factory set end value or the factory set acceptance
mode time limit is reached.
Float mode:
Battery voltage is held at a factory set value, which will neither charge nor
discharge the batteries.
Condition mode occurs every 10
th
charge cycle between Acceptance mode and Float
mode to ensure full restoration of active materials in all the plates of the battery cells.
The SPS has an automatic power sharing feature that automatically decreases the
battery charger output so that the total AC input current draw by the SPS for both the
AC loads and the battery charger does not exceed 30 amps AC. If the loads exceed 30
amps the charger will be at zero amp draw and the AC input circuit breaker will trip. The
battery charger draw will automatically increase when the external loads are reduced if
the batteries will accept more current.
3.2.2 LCD Remote Control/Status Panel – “R4”:
The SPS can only be
controlled by the remote control/status panel which is connected to the SPS module by
a gray flat 8-conductor wire. There are three push buttons and a red LED that when lit
indicates a trouble condition. The remote control/status panel provides system status
through a 16-character by 2 line LCD display.
3.2.3 Transfer Switch – “T” Option:
The transfer switch automatically switches
between “Inverter mode” and “External power mode” depending of the external power
line availability. External power 120 VAC, 60 Hz can be applied directly to the SPS AC
input as explained in section 3.1.2.
3.3 Options
3.2.1 LCD Remote Control/Status Panel – “R1” Option:
This option is the
same as “R4” except the LCD Remote Control/Status Panel – “R1”
part number 141315-
1 includes a 1-foot control wire extending from the back for DC master disconnect if
available in the coach.
