TOSHIBA
5 - 8
5.0
Operating the UPS
5.7
Battery Backup Time
The UPS unit's batteries provide about 10 minutes of back-up time for the 600 through
2400 VA capacity units. These times are valid when the unit is operating under full load.
When the units are operating at half load, the batteries can power the load equipment
about 3 times longer. The exact length of these times will depend on the UPS model
used, condition of the batteries, amount of load, temperature and other variables. See
battery backup time in the standard specifications Sections 4.1 through 4.3.
5.8
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** 2400 600+ 800+ 1000+ 1500+
in VA
Nominal voltage
36
48
48
60
72
96
96
36
48
48
72
in Vdc
Alarm voltage
31.7
42.3
42.3
52.8
63.4
84.5 84.5
31.7 42.3
42.3
63.4
in Vdc
Shutdown voltage
28.8
38.4
38.4
48
57.6
76.8 76.8
28.8 38.4
38.4
57.6
*
includes UC1A1A020C6RK
** except UC1A1A020C6RK
5.9
Battery Check Function
Part of the UPS start-up procedure is an automatic 'Battery Check' to see if a problem
exists in the battery circuit. When the UPS is started it will begin operation in the bypass
mode. An automatic voltage level test of the batteries is made while operating in the
bypass mode for 5 seconds. A failure of this first test will activate visual and audible
alarms (see section 5.3.3 "battery problem"). If this test is passed, then the UPS will auto-
transfer from bypass mode to inverter operating mode. A 10 second automatic voltage
check of the batteries is made after the UPS has auto-transferred from bypass to inverter
mode. Normal inverter operation continues if the second test is passed. If the second test
fails, then the "Fault" LED will flash and up too three additional automatic battery voltage
checks are made at 3 hour intervals while the inverter continues to operate. If the
batteries are found to be normal during one of these three tests then the "Fault" LED
will stop flashing and normal inverter operation will continue. A failure of the third and
final check will activate visual and audible alarms (see section 5.3.3 "battery problem")
causing an auto-transfer back to bypass.
If the batteries are indicated "bad" then
STOP the UPS and allow a 24 hour charge on the batteries before restarting.
5.10
System Reset
The UPS is reset by moving the STOP/RUN switch from "run" to "stop" and then back
to "run". Use the reset procedure to transfer from bypass back to inverter after a fault
occurs. Some faults may only be cleared by shutting down the UPS, waiting for all LED's
on the front panel to go off, and then restarting the UPS.
Summary of Contents for 1400RE Series
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