21
1600EP Series Instruction Manual
Operating the UPS
Battery Backup Time and Discharge Process
The UPS batteries provide about 5-7 minutes of back-up time depending on the 1600EP 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 ‘Standard Specications’ beginning on
pages 15-20.
The following illustration graphically shows the battery discharge process at full load conditions.
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-
RoHS
3.6 kVA 6 kVA 8 kVA 10 kVA 14 kVA 18 kVA 22 kVA
Nominal voltage (Vnom)
144 Vdc 216 Vdc 216 Vdc 288 Vdc 288 Vdc 288 Vdc 288 Vdc 288 Vdc
Alarm voltage (Vlow)
130 Vdc 192 Vdc 192 Vdc 246 Vdc 246 Vdc 246 Vdc 246 Vdc 246 Vdc
Shutdown voltage (Vmin)
114 Vdc 170 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
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