Battery Backup Time And Discharge Process; Battery Low Voltage Tolerances - Toshiba 4200FA User Manual

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
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.
T O S H I B A
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.
Nominal Voltage
Alarm Voltage
Shutdown Voltage min.
288 VDC
252 VDC
216 VDC
38