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1.2.2 Operation Mode
The 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
• Frequency Converter mode
1.2.2.1 Normal Mode
The inverter continuously supplies AC power to the critical AC load. The rectifier derives
power from the AC mains input source and supplies DC power to the inverter, meanwhile
the charger derives the DC power from the rectifier and charger its associated backup
batteries.
Figure 1-4 Normal mode operation diagram
1.2.2.2 Battery Mode
Upon failure of the AC mains input power, the inverter will obtain power from the batteries,
and supply AC power to the critical AC load. There is no interruption to the critical load.
After restoration of the AC mains input power, UPS will transfer automatically to normal
mode without users’ intervention.
Figure 1-5 Battery Mode operation diagram
Note: With the function of “Battery Cold Start”, the UPS could start without utility.
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