13
3-1-3. Bypass Mode
Upon connecting to utility input power, the UPS is in Bypass mode before UPS is turned on (if BYPASS enable
setting is Enabled), and charger function will be active when battery is present.
After UPS has been turned on, if the UPS encounters abnormal situations (over-temperature, overload …, etc.),
UPS will perform the load from the inverter to the bypass source with no interruption. If the transference is
caused by a recoverable reason, the UPS will turn back to line mode when abnormal situation is solved.
Bypass Mode Diagram
3-1-4. Line Mode
In Line Mode, the rectifier derives power from the utility power, supplies DC power to the inverter and the
charger charges the battery. The inverter filters the DC power and converts it into pure and stable AC power to
the load.
Line Mode Diagram
3-1-5. Battery Mode
The UPS automatically transfers to battery mode if the utility power fails. There is no interruption in power to the
critical load upon failure.
In battery mode, the rectifier derives power from the battery and supplies DC power to the inverter. The inverter
filters the DC power and converts it into pure and stable AC power to the load.
