AEG PROTECT B. 750 Operating Instructions Manual page 9

stabilizes the load voltage. As a result, voltage fluctuations in
the public utility's mains are reduced to a level which is
acceptable for the loads. This is performed without recourse
to the internal energy storage, something which in turn has a
positive effect on battery availability.
UPS block diagram PROTECT B.
The static bypass switch is activated in the event of a mains
failure. The inverter then takes over the voltage supply of the
connected loads, in order to prevent the risk of data loss or
damage to the loads. PROTECT B. supplies voltage until the
battery is discharged, allowing you to shut down your IT
system properly and switch it off. The standby time mainly
depends on the connected loads. If the mains power supply is
back to normal values, the UPS will switch back the loads to
mains supply. The battery charger will then recharge the
battery.
For safety reasons (as required by German standards, VDE),
the mains input in the unit will be disconnected by a two-pole
switch in the event of a mains failure. Energy backfeed to the
mains and voltage supply to the pins of the mains connector
are thus reliably avoided.
Furthermore, additional protective measures ensure effective
protection for the data/network interface.
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