6
Form 122067
3.2
Available Options
3.2.1
Emergency Vehicles – “A” Option:
The SPS has only one AC output
circuit with a 20A output breaker. With the “A” option 120VAC 60Hz AC outlets and the
set of hardwire leads are both GFCI protected.
3.2.2 Battery Charger – “B3” Option:
The three-step battery charger feature
requires the transfer switch “T” option to operate. 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.
The 3-steps of the charging process are as follows:
a)
Bulk mode:
Charging current is passed through the batteries until a factory set
acceptance voltage limit is reached. The charger’s maximum output and the state of
charge of the batteries determine the amount of current.
b)
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.
c)
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 15 amps AC. If the loads exceed 15
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.
3.2.3 Remote “On/Off Switch, Ground Start – “R2” Option:
If the “R2”
option is included, the SPS can be controlled by a customer supplied remote “On/Off”
switch connected to the 18-gauge black wire labeled “remote switch hook-up” which is
located in the field-wiring compartment, the line side of the switch must be connected to
ground.
3.2.4 Transfer Switch – “T” Option:
The transfer switch automatically switches
between “Inverter mode” and “External power mode” depending on 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.
3.2.5 Utility Vehicles – “U” Option:
SPS having the “U” option are designed for
heavy-duty use on utility vehicle applications. The “U” option provides two AC output
circuits; one circuit is GFCI protected and has one 20A branch breaker. The second
circuit (lead hardwires) is non-GFCI protected and has a 30A output breaker. All SPS
having the “U” option come with a set of two heat sinks located at the back of the
chassis for heat dissipation purposes. A push to test LED battery voltage meter is also
included with the “U” option.