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 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 Delta or non-Delta external maintenance bypass cabinet's Output
Breaker or Switch (Q4). During the conversion process, output voltage remains the same.
Please see Figure 3-4. 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
Delta or non-Delta External Maintenance Bypass Cabinet
Q3
UPS
Q1 Q0
Q5
(Figure 3-3: Online Mode Diagram_ Single Input Single Unit)
Delta or non-Delta External Maintenance Bypass Cabinet
Q3
UPS
Q1 Q0
Q5
(Figure 3-4: Battery Mode Diagram_ Single Input Single Unit)
Static Switch
Rectifier Inverter
Static Switch
Rectifier Inverter
3-5
3 Operation Modes
LOAD
Q4
LOAD
Q4