TOSHIBA
5 - 7
0.3 S 0.3 S
1 S1 S
5 S70 S
5.0 Operating the UPS
5.6 Battery Low Voltage Tolerances
Excessive discharge will cause the UPS unit's battery voltage to drop. The chart shown
below lists the voltage level at which each UPS unit's low-voltage alarm will sound and
also at what level the low-voltage condition will cause the unit to automatically shut down.
UPS Capacity 600 800 1000 1200 1500 2000 500+ 750+ 1000+ 1500+
in VA
Nominal voltage 36 48 60 72 72 96 36 48 60 72
in Vdc
Alarm voltage 31.7 42.3 52.8 63.4 63.4 84.5 31.7 42.3 52.8 63.4
in Vdc
Shutdown voltage 29.7 38.9 48.6 58.3 58.3 77.8 29.2 38.9 48.6 58.3
in Vdc
5.7 Audible Alarm Functions
Audible alarms will sound when the UPS unit is in the battery backup mode, has
low battery voltage, or is in an overload condition. The chart shown below depicts
the audible alarm pattern for each condition. Time units are shown in seconds.
Condition Audible Pattern
UPS in battery
backup mode
(battery voltage:
100% - 88%)
UPS low battery
voltage (voltage
less than 88%)
Overload
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