Chapter 3: Operation Modes - Delta Ultron HPH Series User Manual

 Online Mode
The critical load is supplied by the inverter, which derives its power from the main AC power, and
the UPS charges the batteries as needed and provides power protection to the equipment. During
on-line mode, the LED indicator illuminates green.
(Figure 3-1: Path of Electrical Power through the UPS in Online Mode)
 Standby Mode
When the input voltage and frequency of the main AC power are within the normal range, the UPS
runs in standby mode and charges the batteries. The bypass and the inverter have no output. The
LED indicator illuminates yellow.
(Figure 3-2: Path of Electrical Power through the UPS in Standby Mode)
Ultron HPH Series

Chapter 3: Operation Modes

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