Operating Modes; Mode "On-Line - ABB DPA UPScale ST40 User Manual

3.4 Operating modes

3.4.1 Mode "ON-LINE"

In on-line mode, the load is connected to the inverter (INV) and the rectifier (Line1) is supplied by the
main utility supply. The on-line mode protects the load from any utility main disturbance or failure.
The on-line mode status is shown in the mimic of control panel per module as follows:
Fig 3.4.1-2: "ON LINE" control panel mimic
In the unlikely event of an inverter fault or overload condition, the UPS will transfer the load
automatically and without interruption to the static bypass (transfer time = 0 s).
Modifications reserved
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Fig 3.4.1-1: "ON LINE" operating mode
LED Indicator
LINE 1
LINE 2
BYPASS
INVERTER
BATTERY
Color
Green
Green
OFF
Green
Green