Operating The Ups; Battery Backup Time And Discharge Process; Battery Low Voltage Tolerances - Toshiba UE3G2L036C61T 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. When these models are operating at half load, the batteries can provide about
15-20 minutes of back-up time. 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 Specifications' beginning on pages 18-21.
The following illustration graphically shows the battery discharge process at full load conditions.
Imax
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)
TOSHIBA
Vnom
Vlow
Vmin
100%
Battery Capacity
3.6kVA 6.0kVA
216Vdc 216Vdc
192Vdc 192Vdc
170Vdc 170Vdc
23
Shutdown
Voltage
0%
20%
8.0kVA 10kVA 14kVA
288Vdc 288Vdc 288Vdc
246Vdc 246Vdc 246Vdc
227Vdc 227Vdc 227Vdc
18kVA
288Vdc
246Vdc
227Vdc