TOSHIBA
6.2 Battery Backup Time and Discharge Process
The UPS system, when used in conjunction with a TOSHIBA designed Battery System, is
designed to provide several minutes of back-up time for the 4200FA UPS (Refer to the Battery
System Manual for back-up times). These times are valid for full-load operation. At half-load
operation the batteries can provide approximately 2 times the specified value. The exact times
will depend on the UPS model used, condition of the batteries, amount and type of load,
temperature, and other variables.
CAUTION Contact your TOSHIBA sales representative if using battery systems
other than TOSHIBA designed battery systems to determine
compliance. Using other systems may void the warranty and/or the
safety certifications.
The following illustration shows the battery discharge process at full load conditions.
6.3 Battery Low Voltage Tolerances
Excessive discharge will cause the UPS battery voltage to drop below tolerable levels. The table
below lists the normal operating voltage, the voltage levels at which the low-voltage alarm will
sound, and the low-voltage level at which an automatic shut down will occur.
Nominal Voltage 288 VDC
Alarm Voltage 252 VDC
Shutdown Voltage min. 216 VDC
4200 FA User’s Manual 31