Dual Input; On-Line Mode_ Dual Input_ Single Unit; Battery Mode_ Dual Input_ Single Unit - Delta Modulon DPH series User Manual

3.2

Dual Input

3.2.1 On-Line Mode_ Dual Input_ Single Unit

In On-Line mode, the main AC source supplies AC power via the Input Breaker (Q1) to the
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 (Q4). Please see Figure 3-15 for On-Line
mode diagram. During On-Line 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 is abnormal, 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 (Q4). 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.
Modulon DPH Series
Q3
Q2
Q1
Q5
(Figure 3-15: On-Line Mode Diagram_ Dual Input Single Unit)
Static Switch
Rectifier Inverter
3-16
LOAD
Q4