Mode "Off-Line" (Eco Or Bypass Mode) - ABB DPA UPScale ST40 User Manual

3.4.2 Mode "OFF-LINE" (Eco or bypass mode)

In "OFF-Line Mode", the load is supplied from the bypass mains (LINE 2) through the static bypass
(BYPASS). The Inverter is OFF.
The OFF-Line mode status is shown in the mimic of the control panel per module as follow:
Fig 3.4.2-2: "OFF LINE" control panel mimic
In off-line mode, the battery charger remains active. In the event of a bypass mains (LINE 2) failure,
the load will be automatically transferred from mains to inverter within 5 ms (this is valid for single and
parallel systems). If the utility mains supply (LINE 1) is not available, the energy is supplied by the
battery.
Bypass mode is recommended only if the loads can tolerate interruptions of 3-5 ms (transfer time
from bypass mode to on-line mode)
TO OBTAIN THE BEST POWER SECURITY, IT IS RECOMMENDED TO RUN
THE UPS ON NORMAL OPERATION MODE, IE, UPS MODE (MODE "ON-
LINE")
NOTE!
Modifications reserved
Page 17/79
Fig 3.4.2-1: "OFF LINE" operating mode
LED Indicator
LINE 1
LINE 2
BYPASS
INVERTER
BATTERY
Color
Green
Green
Green
OFF
Green