Battery Backup Time And Discharge Process; Battery Low Voltage Tolerances - Toshiba 1600XP SERIES Installation And Operation Manual

10.5 Battery Backup Time and Discharge Process

The UPS batteries provide approximately 5-7 minutes of back-up time depending on the 1600XP unit kVA
rating. These times are valid when the unit is operating under full load and at the rated power factor. The
exact length of these times will depend on the UPS model used, condition of the batteries, amount and
type of load, temperature and other variables. See battery backup time in 'UPS Specifications' beginning
on page 53.
The following illustration graphically shows the battery discharge process at full load conditions.
CURRENT
I
MAX
I
MIN

10.6 Battery Low Voltage Tolerances

Excessive discharge will cause the UPS battery voltage to drop. The chart shown below lists the voltage
level at which each UPS low-voltage alarm will sound and at what level the low-voltage condition will
cause the unit to automatically shut down.
UPS Capacity
Nominal voltage (Vnom)
Alarm voltage (Vlow)
Shutdown voltage (Vmin)
18
VOLTAGE
V
NOM
V
LOW
V
MIN
100%
BATTERY CAPACITY
3.6 kVA 6 kVA 8 kVA
144 Vdc 216 Vdc 288 Vdc 288 Vdc 288 Vdc 288 Vdc
130 Vdc 192 Vdc 246 Vdc 246 Vdc 246 Vdc 246 Vdc
114 Vdc 170 Vdc 227 Vdc 227 Vdc 227 Vdc 227 Vdc
SHUTDOWN
20% 0%
10 kVA 14 kVA 18 kVA
1600XP Series Installation and Operation Manual
22 kVA
288 Vdc
246 Vdc
227 Vdc