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5. Operation Modes
Normal (Online) Mode
The critical load is supplied by the inverter,
which derives its power from the utility AC
power. The UPS charges the batteries as
needed and provides power protection to
the equipment. During on-line mode, the
NORMAL LED indicator (
NORMAL
)
illuminates (green).
Standby Mode
When the input voltage and frequency of
the utility 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.
ECO Mode
The UPS can be set in ECO mode
manually. In ECO mode, when the utility
input voltage is within the ±10% range
of rated voltage, the load is supplied by
the utility power and the BYPASS LED
indicator (
BYPASS
) illuminates
(yellow); if out of the range, the load is
supplied by the inverter and the NORMAL
LED indicator (
NORMAL
) illuminates
(green).
This section provides a basic description of the UPS system’s path of electrical power in its various operating modes. For more
information about how operating modes are shown in the LCD’s main screen, refer to
8. LCD Display and Settings
.
BYPA.
MAINS
LOAD
Batteries
Rectifier
Inverter
(Figure 5-1: Path of Electrical Power through the UPS in Normal [Online] Mode)
(Figure 5-2: Path of Electrical Power through the UPS in Standby Mode)
BYPA.
MAINS
LOAD
Batteries
Rectifier
Inverter
(Figure 5-3: Path of Electrical Power through the UPS in ECO Mode)
BYPA.
MAINS
LOAD
Batteries
Rectifier
Inverter
