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

Vertiv™ Liebert® GXT5 Lithium-Ion UPS Installer/User Guide
Table 2.4 Major Components
Item Component
Transient Voltage
Surge Suppression
1
(TVSS) and
EMI/RFI Filters
Rectifier/Power
2 Factor Correction
(PFC) Circuit
3 Batteries
DC to DC
4
Converter
5 Inverter
Dynamic Internal
6
Bypass
7 EMI/RFI Filters
8 Outlet group
9 Outlet group
10 Outlet group

2.6 UPS States and Operating Modes

NOTE: LED Indicators
section.

2.6.1 Normal mode

When utility power is normal, the Normal mode employs the rectifier and inverter to provide voltage and frequency stabilized
power to the load. The battery is charged in the 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.

2.6.2 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 seconds. 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 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.
8
Operation/Function
Provide surge protection. Filter Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI). Minimize
surges or interference present in the utility power and protect devices connected on the same branch as the UPS.
In normal operation, converts utility AC power to regulated DC power for use by the inverter while ensuring that the
wave shape of the input current used by the UPS is near ideal. Extracting this sine wave input current ensures efficient
use of utility power and reduces reflected harmonic distortion making cleaner power available to devices that are not
protected by the UPS.
Lithium-ion batteries.
NOTE: The optimum battery ambient temperature range is 59°F-86°F (15°C-30°C).
Raises the DC voltage from the battery to the optimum operating voltage for the inverter. This allows the inverter to
operate continuously at its optimum efficiency and voltage, thus increasing reliability.
In normal operation, converts utility AC power to regulated DC power for use by the inverter while ensuring that the
wave shape of the input current used by the UPS is near ideal. Extracting this sine wave input current ensures efficient
use of utility power and reduces reflected harmonic distortion making cleaner power available to devices that are not
protected by the UPS.
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 24 .
Filter Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI). Minimize interference present in the
utility power and protect devices connected on the same branch as the UPS.
Programmable output receptacles.
General output receptacles.
General output receptacles on 3000 VA models only.
on page 26 , for description of the run indicator and alarm indicator LEDs mentioned in this
Proprietary and Confidential ©2022 Vertiv Group Corp.
Transferring from Normal to Bypass
2 Vertiv™ Liebert® GXT5 Lithium-Ion Description