Vertiv Liebert GXT5 Series Installer/User Manual page 13

Figure 1-6 Basic Operating Principle Diagram
Table 1-2 Major Components
ITEM COMPONENT
Transient Voltage Surge
1 Suppression (TVSS)
and EMI/RFI Filters
Rectifier/Power Factor
2
Correction (PFC) Circuit
3 Batteries
4 DC-to-DC Converter
5 Inverter
Dynamic Internal
6
Bypass
7 EMI/RFI Filters
8 Outlet group
9 Outlet group
10 Outlet group
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�
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).
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, 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�
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
page 26�
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 2,000- and 3,000-VA models only�
Transferring from Normal to Bypass Mode
GXT5 Description
on