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Vertiv I Liebert ITA2 30kVA I Manual
1.5.3
Battery Mode
Upon mains failure or voltage out of range, the rectifier and internal charger will stop running,
and the battery will supply power to the load through the inverter. In Battery mode, the run
indicator (green) is on, alarm indicator (yellow) is on, and the buzzer beeps every seconds.
The 'Current' page in LCD will display 'On Battery'.
Figure 1-7 Battery mode
1. The battery has been fully charged before delivery. However, some loss of
capacity is inevitable during transportation and storage. Therefore, it is important to
charge the battery for eight hours before the UPS is first put into operation to
ensure it can provide adequate backup time.
2. The Liebert ITA2 UPS supports cold start function, while this function is activated,
UPS can be powered using battery mode without availability of input power supply.
Therefore, the battery power can also be utilized independently for improving the
system availability .
1.5.4
ECO Mode (For Single UPS With External Battery Only)
In ECO mode, the load is powered by bypass when the bypass voltage is normal, and the load
is powered by inverter when the bypass voltage is abnormal. ECO mode is an energy-saving
operation mode. For power equipment insensitive to power grid quality, you can use the ECO
mode for power supply through bypass to reduce the power loss.
1. In ECO mode, if the bypass failure or abnormal bypass voltage appears when the
output is not overloaded, the UPS will transfer to Normal mode. However, if the
bypass failure or abnormal bypass voltage appears when the output is overloaded,
the UPS will not transfer to Normal mode, but shut down the bypass.
2. In ECO mode, the efficiency of the UPS is up to 99%.
Static switch
UPS output
Inverter
Rectifier/PFC
Charger
Battery
Bypass input
Mains input
