Liebert gxt2u user manual Battery Charger, DC to DC Converter, Dynamic Bypass

Major Components

3.4BATTERY CHARGER

The battery charger utilizes energy from the utility power and pre- cisely regulates it to continuously “float charge” the batteries. The bat- teries are being charged whenever the Liebert GXT2U is plugged in, even when the UPS is not turned on.

3.5DC 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 continuously at its opti- mum efficiency and voltage, thus increasing reliability.

3.6BATTERY

The Liebert GXT2U utilizes valve-regulated, nonspillable, lead acid batteries. To maintain battery design life, operate the UPS in an ambient temperature of 68°F to 77°F (20°C to 25°C). Optional external battery cabinets are available to extend battery run times.

3.7DYNAMIC BYPASS

The Liebert GXT2U provides an alternate path for utility power to the connected load in the unlikely event of a UPS malfunction. Should the UPS have an overload, overtemperature, or UPS failure condition, the UPS automatically transfers the connected load to bypass. Bypass operation is indicated by an audible alarm and illuminated amber Bypass LED (other LEDs may be illuminated to indicate the diag- nosed problem). To manually transfer the connected load from the inverter to bypass, press the Standby button once.

NOTE

The bypass power path does NOT protect the connected equipment from disturbances on the utility supply.

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