Manual Bypass Mode; Eco Mode - Delta Modulon DPH Series User Manual

3.4

Manual Bypass Mode

When the UPS runs in Manual Bypass mode, the current only flows through the
maintenance bypass so that the maintenance personnel can maintain the circuit inside
the UPS. However, DO NOT touch any external maintenance bypass cabinet's terminal
and bus bar which may carry high-voltage electricity. During Manual Bypass mode,
the UPS's input power is completely cut off, and the critical loads are not protected.
At the moment, the UPS's tri-color LED and LCD screen are both off.
Bypass
MAIN
Batteries
3.5

ECO Mode

After the UPS is manually set as ECO mode via the LCD, the UPS will work in Bypass
mode if bypass input voltage and frequency are within ±10% of the rated voltage and
±3 Hz of the rated frequency respectively. Otherwise, the UPS will run in On-Line
mode. During ECO mode, the UPS's tri-color LED illuminates green and the text 'ECO'
appears in the upper right corner of the LCD screen.
Bypass
MAIN
Batteries
Static Switch
Rectifier
Figure 3-4: Manual Bypass Mode Diagram
Static Switch
Rectifier
Figure 3-5: ECO Mode Diagram
Inverter
Inverter
LOAD
LOAD
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