Bypass Mode_ Dual Input_ Single Unit - Delta Modulon DPH Series User Manual

BYPA.
MAIN
Batteries

3.2.3 Bypass Mode_ Dual Input_ Single Unit

When the inverter encounters abnormal situations such as over temperature, overload,
short circuit, abnormal output voltage or low battery, it will automatically shut itself down.
If the UPS detects the bypass AC source is normal, it will automatically switch to Bypass
mode to protect the connected critical loads from power interruption. Please refer to Figure
3-17. After the above-mentioned abnormalities are eliminated, the UPS will switch back to
On-Line mode from Bypass mode. During Bypass mode, the UPS's tri-color LED illuminates
yellow and the text 'Bypass' appears in the upper right corner of the screen.
BYPA.
MAIN
Batteries
Q3
Q2
Q1
Q5
(Figure 3-16: Battery Mode Diagram_ Dual Input Single Unit)
Q3
Q2
Q1
Q5
(Figure 3-17: Bypass Mode Diagram_ Dual Input Single Unit)
Static Switch
Rectifier Inverter
Static Switch
Rectifier Inverter
3-17
3 Operation Modes
LOAD
Q4
LOAD
Q4