Emerson LIEBERT GXT5000R-208 - Manual (Page 9)

5
MAJOR COMPONENTS
Transient Voltage Surge Suppression (TVSS) & 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 sensitive equipment protected.
Rectifier/Power Factor Correction (PFC) Circuit
In normal operation, the rectifier/PFC circuit converts utility AC power to regulated DC
power for use by the inverter while ensuring that the waveshape 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 GXT5000R-208.
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. When utility power fails, the
inverter takes power from the battery through the DC to DC converter and inverts it into
alternating current. In both modes of operation, the UPS inverter is on-line and continuously
generating clean, precise, regulated AC output power.
Battery Charger
The battery charger utilizes utility power and precisely regulates it to continuously “float”
charge the battery system.
DC to DC Converter
The DC to DC converter utilizes energy from the battery system and raises the DC voltage to
the optimum operating voltage for the inverter. This allows the inverter to operate continu-
ously at its optimum efficiency and voltage, thus increasing reliability.
Battery
The GXT5VBATT and GXT5VBATTW120 employs valve-regulated, nonspillable, lead acid
batteries. At an ambient temperature of 68°F to 77°F (20°C to 25°C) and with the UPS float
charging, the battery design life will be maintained.