Product Description
10
1.5.3 Battery Mode
The Liebert GXT3 enters Battery Mode when utility power fails or is outside acceptable values. The
battery system supplies power through the DC-to-DC converter to the inverter to generate clean AC
power for the connected loads.
When the Liebert GXT3 enters Battery Mode, the UPS sounds a half-second beep at 10-second inter-
vals. When approximately 2 minutes of run time remains, the beeps sound every 5 seconds to warn
that the battery is getting low (this Low Battery Warning is user-configurable).
In Battery Mode, the AC Input indicator goes off and the Battery Level indicators illuminate. Each
battery level indicator represents a 20% capacity level. As capacity decreases, fewer indicators remain
illuminated. Refer to 7.0 - Troubleshooting.
For approximate battery run times, refer to 9.0 - Specifications. The times in Table 14 are approxi-
mate. They are based on resistive load and an ambient temperature of 77°F (25°C). To increase this
time, turn Off non-essential loads (such as idle computers and monitors) or add optional external bat-
tery cabinets.
1.5.4 Battery Recharge Mode
Once utility power is applied to the Liebert GXT3, the Battery Charger begins charging the batteries.
1.5.5 Frequency Converter Mode
All models of the Liebert GXT3 are capable of frequency conversion. Frequency Conversion Mode can
be selected using the configuration program. Allowable frequency operating modes include:
• Auto Sensing - 50Hz or 60Hz – Bypass Enabled
• Auto Sensing - 50Hz or 60Hz – Bypass Disabled
• Frequency Converter - 50Hz – Bypass Disabled
• Frequency Converter - 60Hz – Bypass Disabled
The default for all models of the Liebert GXT3 is “Auto Sensing - 50Hz or 60Hz – Bypass Enabled.”
!
CAUTION
Turning Off the Liebert GXT3 when it is in Battery Mode will result in loss of output power.
If the UPS is turned Off manually, it must be manually restarted after utility power returns.
If the UPS is turned Off by a communication signal or because the batteries are depleted, it
will operate as selected in the configuration program for Auto-Restart (Refer to 5.2.1 -
Configuration Program).
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