4.
WORKING AND
OPERATIONS MODES
365
UPO33
9<<
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4.2. Battery dischargue
The UPO 33 UPS works under the following operation modes:
4.1. Normal Operation
Figure 4.1 . Operating diagram UPO 33 UPS in normal mode
Figure 4.2 Operating diagram UPO33 UPS in battery mode
Figure 3.1 shows the outline of UPO 33 UPS operation when operating normally
In this mode, the energy delivered to the load is supplied by the battery
bank. The investor is responsible for transforming the DC voltage into AC
voltage batteries. The UPS enters this mode when no input voltage to the
UPS or there is an abnormal condition at the entrance. If the abnormality to
the input persists for a long time, the UPS will cease to supply the load in
order to prevent a deep discharging the batteries, however, the control
electronics and the front panel will continue to function. If the outage lasts
much longer, it is recommended to completely turn off the UPS and discon-
nect the battery bank (see section 6.2) in order to avoid a complete dischar-
ge of the batteries.
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When the UPS is operating normally , the AC voltage at the input is conver-
ted into DC voltage by the rectifier .
This DC voltage is used to charge the batteries and power the inverter.
The inverter is responsible for transforming the DC voltage to the rectifier
output in a sine wave feed the load .
