Major Components - Liebert UPS User Manual

INPUT
EMI/RFI
Filter
EMI /RFI FILTERS
These UPS components provide surge protection, and filter both electromagnetic
interference (EMI) and radio frequency interference (RFI). They minimize any
surges or interference present in the utility line and keep the sensitive equipment
protected.
RECTIFIER/POWER FACTOR CORRECTION (PFC) CIRCUIT
In normal operation, the rectifier/power factor correction (PFC) circuit 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 sinewave input current achieves two objectives: the utility power is
used as efficiently as possible by the UPS, and the amount of distortion reflected
on the utility is reduced. This results in cleaner power being available to other
devices in the building not being protected by the UPStation GXT.
INVERTER
In normal operation, the inverter utilizes the DC output of the power factor
correction circuit and "inverts" it into precise, regulated sinewave AC power.
Upon a utility power failure, the inverter receives its required energy from the
battery through the Rectifier / PFC. In both modes of the operation, the UPS
inverter is on-line and continuously generating clean, precise, regulated AC
output power.
BATTERY CHARGER
The battery charger utilizes energy from the Rectifier / PFC and precisely
regulates it to continuously "float" charge the battery system. The battery system
charges whenever the UPStation GXT is connected to utility power.
BATTERY
The UPStation GXT employs valve regulated, nonspillable, lead acid batteries.
At a typical room temperature (70° F) and with the UPS float charging, the
battery system will last many years. Optional external battery cabinets are
available to provide extended run times.

MAJOR COMPONENTS

Rectifier/PFC
Battery
Battery
Charger
Inverter
Static Bypass
5
Output Transformer
GXT 208X, 230X, &
240X models only
EMI/RFI
Filter
OUTPUT