Overview
10
UPS 30-300kVA User Manual
1.4.1
Normal mode
The inverter of power modules continuously supply the critical AC load. Therectifier/charger
derives power from the AC mains input source and supplies DC power to the inverter while
simultaneously FLOAT or BOOST charging its associated backup battery.
Rec�fier
AC/DC
Main
Sta�c Bypass
Manual Bypass
Inverter
DC/AC
Charge/
Discharge
Output
Ba�ery
Bypass
Figure1-3UPS conceptual diagram in normal mode
Note
Indicates the energy flow direction.
1.4.2 Battery Mode
Upon failure of the AC mains input power, the inverter ofpower unit, which obtain power from the
battery, supply the critical AC load. There is no interruption in power to the critical load upon
failure. After restoration of the AC mains input power, the” Normal mode” operation will continue
automatically without the necessity of user intervention.
Rec�fier
AC/DC
Main
Sta�c Bypass
Manual Bypass
Inverter
DC/AC
Charge/
Discharge
Output
Ba�ery
Bypass
Figure1-4UPS conceptual diagram in Battery mode
Note
With the function of Battery cold start, the UPS may start without utility. See more detail in
section4.1.2.
