Emerson GXT2U Major Components, Transient Voltage Surge Suppression and EMI/RFI Filters, Inverter

Input	MAJOR COMPONENTS	Output
	Dynamic
	Bypass

L1	TVSS &
	EMI/RFI
	Filters

Rectifier

/PFC

Inverter	L1
DC to DC
Converter

Battery

Charger

L2

G

Battery

L2

G

Transient Voltage Surge Suppression and 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 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.

•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 Liebert GXT2U.

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 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 utility power and precisely regulates it to continuously “float charge” the batteries. The batteries are being charged whenever the Liebert GXT2U is plugged in, even when the UPS is not turned on.

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