Product Manual

Manual Skylla with universal input 7
2. DESCRIPTION
2.1 The Skylla-TG battery charger
The Skylla-TG battery charger is a fully automatic charger for 24V batteries and
accepts any mains supply that delivers 90-265 V AC, with frequencies ranging from
45 to 65 Hz. The Skylla-TG also accepts DC supply, ranging from 90 up to 400 V
DC.
It charges the battery according to the IUoUo characteristic, which is a 3-stage
charging characteristic. This characteristic is shown below in illustration 1.
While charging, the Skylla-TG charger continuously measures the battery voltage
and current and recalculates the charging voltage and current based on the
measured values.
Type
Boost voltage
Float voltage
Minimal
voltage
24V / 30A
28,5 Vdc
26,5 Vdc
25 Vdc
24V / 50A
28,5 Vdc
26,5 Vdc
25 Vdc
24V / 100A-G
28,5 Vdc
26,5 Vdc
25 Vdc
Assuming that the battery is discharged, the Skylla-TG charger commences
charging in the boost-charge mode. In this mode the battery is charged until the
battery voltage reaches the boost voltage. At this point the battery is charged to
approximately 80% of its maximum capacity. This is the end of the boost-charge
mode and the Skylla-TG charger then automatically switches to the equalize-charge
mode.
During the equalize-charge mode the charging voltage still equals the boost voltage,
but the charge current slowly decreases. The duration of this mode is pre-selectable
and may be set to 4, 8 or 12 hours. The standard time of the equalize-mode is 4
hours. After this time the Skylla-TG charger automatically switches back to the float-
charge mode.
In the float-charge mode the charge voltage decreases to the float voltage and the
charge current continues to decrease. This mode lasts for 20 hours.
Illustration 1.
The IUoUo charge
characteristic.