Filter
Top Products
60 4200FA Installation and Operation Manual
Battery Backup Mode 8.4
The following illustration shows power flow during the battery backup mode.
When commercial AC power failures occur, the batteries instantly begin supplying DC voltage to the main
inverter circuit. This circuit inverts (hence; Inverter) the DC power into AC power. The AC power is
available at the output.
This back-up process will continue until the battery voltage drops below a specific minimum level. When
this occurs, the batteries will stop supplying power to the load. This minimum level is the rated minimum
voltage (V min).
Figure 8-4 Power flow in battery backup mode
Converter Inverter
Bypass
Charger/
Chopper
Isolating
XFMR
External
Batteries
Output
Power
MCCB
MBS
(Not available for LT units)