Major Components; Transient Voltage Surge Suppression (Tvss) And Emi/Rfi Filters; Rectifier/Power Factor Correction (Pfc) Circuit - Liebert UPSTATION GXT 2U User Manual

INPUT
TVSS and
L
EMI/RFI
Filters
N
G
TRANSIENT VOLTAGE SURGE SUPPRESSION (TVSS) AND EMI/RFI
FILTERS
These UPS components provide surge protection, and filter both electro-
magnetic interference (EMI) and radio frequency interference (RFI). They
minimize any surges or interference present in the mains line and keep
the sensitive equipment protected.

RECTIFIER/POWER FACTOR CORRECTION (PFC) CIRCUIT

In normal operation, the rectifier/power factor correction (PFC) circuit con-
verts 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 mains is reduced. This results in cleaner
power being available to other devices in the building not being protected
by the UPStation GXT 2U.
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 DC to DC converter. In both modes
of the operation, the UPS inverter is on-line and continuously generating
clean, precise, regulated AC output power.

MAJOR COMPONENTS

RECTIFIER
/ PFC
BATTERY
CHARGER
DYNAMIC
BYPASS
DC TO DC
CONVERTER
BATTERY
5
OUTPUT
INVERTER
L
N
G