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Vertiv I Liebert ITA2 30kVA I Manual
1.5
UPS State And Operation Mode
For the LED indicators introduced in this section, refer to
4.1.1 LED Indicators.
The UPS state and operation mode include: Normal mode, Bypass mode, Battery mode, ECO
mode, Fault state and Maintenance Bypass mode. The operation schematic diagrams of
Normal mode, Bypass mode, Battery mode and Maintenance Bypass mode are shown in
Figure 1-5 to Figure 1-8.
Maintenance bypass mode is activated only when the UPS output power distribution
unit (POD in short) is selected.
1.5.1
Normal Mode
When the mains input is normal, the load is supplied with voltage-stabilizing and
frequency-stabilizing power by the mains after processing of the rectifier and the inverter,
and meanwhile, the charger is charging the battery. The operation mode is Normal mode.
In Normal mode, the run indicator (green) is on, the alarm indicator is off, and the buzzer is
silence.
Bypass input
Mains input
UPS output
Static switch
Battery
Charger
Inverter
Rectifier/PFC
Figure 1-5 Normal mode
