Dual Input; Online Mode_ Dual Input_ Single Unit; Battery Mode_ Dual Input_ Single Unit - Delta Modulon DPH Series User Manual

3.2

Dual Input

3.2.1 Online Mode_ Dual Input_ Single Unit

In online mode, the main AC source supplies AC power to the rectifier, and the rectifier
converts the AC power to DC power and supplies the DC power to the inverter. In the
meantime, the rectifier provides charging power to the batteries. After receiving the DC
power, the inverter converts it into clean and stable AC power to the connected critical loads
via the Output Breaker (Q3). Please see Figure 3-15 for online mode diagram. During
online mode, the UPS's tri-color LED illuminates green and the text 'On-Line' appears in
the upper right corner of the screen.
BYPA.
MAIN
Batteries

3.2.2 Battery Mode_ Dual Input_ Single Unit

The UPS transfers to battery mode automatically if the main AC source cannot supply
power, for example, when unstable voltage or a power outage occurs. In battery mode,
the batteries provide DC power and the UPS converts it into AC power and supplies it to
the connected critical loads via the Output Breaker (Q3). During the conversion process,
output voltage remains the same. Please see Figure 3-16 for battery mode diagram. During
battery mode, the UPS's tri-color LED illuminates yellow and the text 'Battery' appears in
the upper right corner of the screen.
Q2
Q1
Rectifier
(Figure 3-15: Online Mode Diagram_ Dual Input Single Unit)
Static Switch
Inverter
3-15
3 Operation Modes
LOAD
Q3