User Manual

Figure 1.9 Basic Operating Principle Diagram
ITEM COMPONENT OPERATION/FUNCTION
1
Transient
Voltage Surge
Suppression
(TVSS) and
EMI/RFI Filters
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.
2
Rectifier/Power
Factor
Correction
(PFC) Circuit
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.
3 Batteries
Valve-regulated, non-spillable, lead-acid batteries.
NOTE: To maintain battery design life, operate the UPS in an ambient temperature of 59°F to 77°F
(15°C to 25°C).
4
DC-to-DC
Converter
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.
5 Inverter
In normal operation, inverts the DC output of the PFC circuit into precise, regulated sine-wave AC power.
When utility power fails, the inverter receives DC power from the DC-to-DC converter. In either
operating mode, the UPS inverter remains on-line, generating clean, precise, regulated AC-output
power.
6
Dynamic
Internal Bypass
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 Transferring from Normal to
Bypass Mode on page26.
7 EMI/RFI Filters
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.
8 Outlet group Programmable output receptacles.
9 Outlet group Generaloutput receptacles.
Table 1.2 Major Components
Vertiv | Liebert® GXT5™ Installer/User Guide
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