ENGLISH
UPS EVO DSP MM Rack Tower
5
User’s manual
4.1
NORMAL Mode
The UPS typically works in Normal mode: Input mains power is available and its amplitude is within specifications.
Please refer to figure 1.
After the filter has eliminated any high Frequency interference present on the mains, the AC Input line is rectified
and conditioned in the Rectifier block (AC/DC conversion); the continuous power now enters into the Inverter
block and is then reconverted into alternated power (DC/AC conversion), overcoming the Automatic Bypass and
feeding the load after an extra filtration. At the same time the UPS recharges the batteries through the Battery
Charger block.
Please refer to figure 2, which describe the UPS front panel.
The Normal mode is identified by:
•
The graphic LCD panel shows the functioning during
Normal mode.
4.2
BATTERY Mode
During operation in Normal mode, if the UPS finds the Mains OFF condition (due to a Blackout or
Overvoltage/Brownout), it then switches into Battery mode. In this case, the batteries supply the required Output
power thanks to the DC/AC conversion carried out by the Inverter. The UPS switches back to Normal mode a few
seconds after AC Input power is restored or Voltage comes back to internal specifications.
Please refer to figure 1.
The Battery mode is identified by:
•
The graphic LCD panel shows the functioning during
Battery mode.
•
An acoustic signal every 4 seconds.
4.3
BYPASS Mode
In Bypass mode, the AC Input line is directly connected with the UPS outlets by an Automatic Bypass.
As indicated in figure 1, in Bypass mode the UPS recharges the batteries.
During Normal mode, the UPS
switches automatically to Bypass mode as a consequence of accidental overload
or Inverter fault thus protecting the supplied devices.
When the UPS is working in Normal mode it is possible to switch the UPS by pressing
ON/MUTE
button
for at least 5 seconds, as explained into chapter 5
.
Rack Display
Tower Display
Rack Display
Tower Display
