Battery Mode_ Single Input_ Single Unit - Delta Modulon DPH Series User Manual

MAIN
Batteries

3.1.2 Battery Mode_ Single 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 3-2 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.
MAIN
Batteries
Q3
Q2
Rectifier
Q1
Q5
(Figure 3-1: On-Line Mode Diagram_ Single Input Single Unit)
Q3
Q2
Rectifier
Q1
Q5
(Figure 3-2: Battery Mode Diagram_ Single Input Single Unit)
Static Switch
Inverter
Static Switch
Inverter
3-3
3 Operation Modes
LOAD
Q4
LOAD
Q4