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8.3 Operation Mode
Standby Mode
After the UPS is connected to the utility AC power, it will supply power to the UPS and the batteries
will be charged. The default setting of the UPS is set in
Standby
mode
Online Mode
In on-line mode, the connected loads are supplied by the inverter, which derives its power from the
utility AC power, and the UPS charges the batteries and provides power protection to its connected
loads.
Bypass Mode
In bypass mode, the critical loads are directly supplied by the utility AC power and the batteries are
charged.
Battery Mode
When the UPS is operating during a power outage, the batteries provide DC power, which
maintains inverter operation to supply power to the critical loads.
You can install the UPSentry 2012 software (please download from https://datacenter-
softwarecenter.deltaww.com.cn) or install the Mini SNMP IPv6 card (optional) or the Mini MODBUS
card (optional) to monitor and estimate the battery remaining capacity. For more information about
the Mini SNMP IPv6 card (optional) or the Mini MODBUS card (optional), please refer to its user
manual.
ECO Mode
In ECO mode, when the utility input voltage and frequency are within the range of rating voltage
±10% and rating frequency ± 3 Hz, the loads are supplied by the utility AC power; if out of the range,
the loads are supplied by the inverter.
Frequency Conversion Mode
In Frequency Conversion mode, the UPS output frequency is manually set up. The system will
disable the bypass function and there is no bypass output.
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