ALLTRONIC SEMIS T33 Manuel D'installation Et D'utilisation page 112

If the iut switch is closed but the I/O switch is open (UPS switched off) the battery chargers operate
independently. Open the iut switch (SWIN) to totally shutdown the UPS and the additional battery chargers.
ER
Version
Nominal voltage
Current in addition to that supplied
by the internal battery charger
10 kVA 12 kVA
甀
15 kVA 20 kVA