Product Introduction
6 Modular UPS 25KVA~900KVA User Manual
batteries.
Rectifier
AC/DC
Inverter
DC/AC
DC/DC
Input
Battery
Output
Fig 2-3 Power module structure
2.3 Operation Mode
The Modular UPS is an on-line, double-conversion UPS that permits operation in the
following modes:
z
Normal mode
z
Battery mode
z
Bypass mode
z
Maintenance mode (manual bypass)
z
ECO mode
z
Auto-restart mode
z
Frequency Converter mode
2.3.1 Normal Mode
The inverter of power modules continuously supply the critical AC load. The
rectifier/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.
Rectifier
AC/DC
Main
Static
Bypass
Manual
Bypass
Inverter
DC/AC
Charger
DC/DC
Output
Battery
Bypass
Fig 2-4 Normal mode operation diagram
2.3.2 Battery Mode
Upon failure of the AC mains input power, the inverter of power modules, 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.
