Ups States And Operating Modes; Normal Mode; Bypass Mode; Battery Mode - Vertiv Liebert GXT5 Series Installer/User Manual

Table 2.3 Major Components (continued)
Item Component
6 Dynamic Internal Bypass
7 EMI/RFI Filters
8 Maintenance Bypass

2.7 UPS States and Operating Modes

NOTE: Refer LED Indicators
this section.

2.7.1 Normal Mode

When utility power is normal, Normal mode employs the rectifier and inverter to provide voltage and frequency stabilized
power to the load. The charger charges the battery in normal mode. On the front panel display, the run indicator (green) is ON,
the alarm indicator is OFF, and the buzzer is silent. The LCD Flow screen displays energy flow from the input power source to
the battery and then to the UPS inverter.

2.7.2 Bypass Mode

Bypass mode supplies power to the load from the bypass source (utility power), if an overload or fault occurs during normal
operation. On the front panel display, the run indicator (green) is ON, the alarm indicator (yellow) is ON, and the buzzer beeps
once each second. The LCD Flow screen displays energy flow from the input power source through the bypass path instead
of the UPS inverter.
NOTE: If utility power fails or if the utility voltage goes outside of the permissible range during bypass mode
operation, the UPS shuts down and no output is supplied to the load.

2.7.3 Battery Mode

Battery mode supplies battery power to the load if utility power fails or if the utility voltage goes outside of the permissible
range. On the front panel display, the run indicator (green) is ON, the alarm indicator (yellow) is ON, and the buzzer beeps
once each second. The LCD Flow screen displays energy flow from the battery through the UPS inverter. The battery status
displays Discharge.
NOTE: The batteries are fully charged before shipment. However, transportation and storage inevitably cause some
loss of capacity. To ensure adequate backup time, it is recommended to charge the batteries for at least 2 hours
before first startup.
NOTE: Powering off the UPS when it is in battery mode results in loss of output power to the connected load.
2 Product Description
Operation/Function
In the unlikely event of UPS failure such as overload or over temperature, automatically transfers the
connected load to bypass.
To manually transfer the connected load from inverter to bypass, see
Mode on page 22.
Filter EMI and RFI. Minimize interference present in the utility power and protect devices connected on the
same branch as the UPS.
In the unlikely event of UPS failure, allows replacing the UPS while keeping the connected equipment powered
with utility power.
NOTE: The bypass power path does not protect connected equipment from disturbances in the utility
supply.
on page 24, for description of the run indicator and alarm indicator LEDs mentioned in
Proprietary and Confidential ©2024 Vertiv Group Corp.
Vertiv™ Liebert® GXT5 Lithium-Ion UPS Installer/User Guide
Transferring from Normal to Bypass
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