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1600XP Series Installation and Operation Manual
10.5 Battery Backup Time and Discharge Process
The UPS internal 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 “Appendix A:
1600XP Specications” on page A1.
The following illustration graphically shows the battery discharge process at full load conditions.
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
3.6 kVA 6 kVA 8 kVA 10 kVA 14 kVA 18 kVA 22 kVA
Nominal voltage (Vnom)
144 Vdc 216 Vdc 288 Vdc 288 Vdc 288 Vdc 288 Vdc 288 Vdc
Alarm voltage (Vlow)
130 Vdc 192 Vdc 246 Vdc 246 Vdc 246 Vdc 246 Vdc 246 Vdc
Shutdown voltage (Vmin)
114 Vdc 170 Vdc 227 Vdc 227 Vdc 227 Vdc 227 Vdc 227 Vdc
BATTERY CAPACITY
SHUTDOWN
I
MAX
I
MIN
V
NOM
V
LOW
V
MIN
100% 20% 0%
CURRENT VOLTAGE