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1.2.2 Operation Mode
The tower UPS is an on-line, double-conversion UPS that permits operation in the following modes:
⚫
Normal mode
⚫
Battery mode
⚫
Bypass mode
⚫
Maintenance mode(manual bypass)
⚫
ECO mode
⚫
Auto-restart mode
⚫
Frequency Converter mode
1.2.2.1 Normal Mode
The inverter of UPS continuously supply the critical AC load. The rectifier/charger derives power
from the AC main input source and supplies DC power to the inverter while simultaneously
FLOAT or BOOST charging its associated backup battery. The Normal mode structure is shown in
Fig.1-4.
Figure 1-4 Normal mode operation diagram
1.2.2.2 Battery Mode
Upon failure of the AC main input power, the inverter of UPS, which obtains 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. The Battery mode structure is shown in Fig.1-5.
