EXS
14
User Manual 10H52260UM60 - Rev. 1 - 10/2017
Battery mode
As shown in Figure 1-4, the operating mode where the battery provides the backup power supply to the loads
through the rectifier and inverter is called battery mode. In the event of a mains failure, the system will transfer
automatically to battery mode with no interruption in the power supply to the load. When the mains power supply is
restored, the system will re-transfer automatically to normal operating mode without any manual intervention, and
with no interruption in the power supply to the load.
Figure 1-4 Battery operating mode line diagram
Note
The battery cold start function may be used to switch the UPS on in Battery (charged) mode directly during mains failure.
This means that the battery power supply can be used independently to improve the availability of the UPS.
Bypass mode
As shown in Figure 1-5, in normal mode, in the event of an inverter failure, inverter overload or inverter manual shut
down, the static switch will transfer the load from the inverter side to bypass side, with no interruption in the power
supply to the load. In this case, if the inverter and bypass are not synchronized, there will be a transitory interruption
in the power supply to the load (not exceeding 20ms).
Figure 1-5 Bypass operating mode line diagram
Maintenance mode
As shown in Figure 1-6, if it is necessary to service the UPS or carry out maintenance work on it, you may use the
manual maintenance bypass switch to transfer the load to maintenance bypass, with no interruption in the power
supply to the load. This maintenance bypass switch is fitted in all UPS modules and rated for full load of one module.
Figure 1-6 Maintenance operating mode line diagram
ECO mode
If ECO mode is selected, all the power switch
es and the circuit breaker are clo
sed, and the system selects the
bypass as the preferred source of power for the load, in order to save energy. When the bypass supply frequency
and voltage are within normal limits (adjustable), the load is powered by the bypass, with the inverter on stand-by;
when the bypass voltage and/or frequency is outside these pre-defined and adjustable limits, the system will
transfer to the inverter output. In this mode, the system can charge the battery normally.
Output switch
Inverter
Rectifier
UPS output
Battery
Automatic inverter switch
Bypass input switch
Bypass input
Static switch
Output switch
UPS output
Maintenance bypass switch
Bypass input
Maintenance bypass
UPS output
