Delta DPH-300K, User Manual

Page: 55 / 240

3 - 2 7
3 Operation Modes
3.2.12 ECO Mode_ Dual Input_ Parallel Units
To activate ECO mode, please refer to
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,
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and
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.
In ECO mode (parallel), when each parallel UPS’s bypass input voltage and frequency
are within the range of rating voltage ±10% and rating frequency ±3Hz, each parallel UPS
works in Bypass mode; otherwise, each parallel UPS runs in On-Line mode. During ECO
mode (parallel), each UPS’s tri-color LED illuminates green and each UPS’s LCD shows the
text '
ECO ' in the upper right corner. Please see
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for the path of electrical power
through the parallel UPSs in ECO mode.
MAIN
LOAD
MAIN
1
2
BYPA.
BYPA.
Q1
Q2
Q4
Q3
Q5
Batteries
Rectifier Inverter
Static Switch
Q1
Q2
Q4
Q3
Q5
Batteries
Rectifier Inverter
Static Switch
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