Eco Mode_ Single Input_ Parallel Units - Delta Modulon DPH Series User Manual

3.1.13 ECO Mode_ Single Input_ Parallel Units

To activate ECO mode, please refer to 6.2.5 ECO Mode Start-up Procedures, 7.6 Main
Screen and 7.10.2 Mode Setting.
In ECO mode (parallel), when each UPS's bypass input voltage and frequency are within
the range of rating voltage ±10% and rating frequency ±3Hz, each UPS works in bypass
mode; otherwise, each UPS runs in online mode. During ECO mode, each UPS's tri-color
LED illuminates green and each UPS's LCD shows the text 'ECO' in the upper right corner.
Please see Figure 3-13 for the path of electrical power through the parallel UPSs in ECO
mode.
UPS 1
MAIN
Batteries
UPS 2
MAIN
Batteries
(Figure 3-13: ECO Mode Diagram_ Single Input Parallel Units)
Q2
Static Switch
Rectifier
Q1
Q2
Static Switch
Rectifier
Q1
3-13
Inverter
Q3
Inverter
Q3
3 Operation Modes
LOAD