Emerson liebert gxt5000r-208 User Manual

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.

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.

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.

The battery charger utilizes utility power and precisely regulates it to continuously “float” 

charge the battery system. 

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.

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.