Operating The Ups; Battery Backup Time And Discharge Process - Toshiba 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 Specifi cations' beginning on
pages 20-25.
The following illustration graphically shows the battery discharge process at full load conditions.
Imax
IMAX
Imin
IMIN
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 also 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)
26
CURRENT VOLTAGE
V NOM
Vnom
Vlow
V LOW
Vmin
V MIN
100%
100%
Battery Capacity
BATTERY CAPACITY
3.6kVA 6kVA
216Vdc 216Vdc
192Vdc 192Vdc
170Vdc 170Vdc
0%
20%
20% 0%
8kVA 10kVA 14kVA
288Vdc 288Vdc 288Vdc
246Vdc 246Vdc 246Vdc
227Vdc 227Vdc 227Vdc
SHUTDOWN
Shutdow
n
18kVA 22kVA
288Vdc 288Vdc
246Vdc 246Vdc
227Vdc 227Vdc
1600EP Series Instruction Manual