AEG Protect C.1000 Operating Instructions Manual page 10

10
The automatic bypass serves to increase the reliability of the supply
further. It switches the public mains directly through to the load if there
is an inverter malfunction. As a result, the automatic bypass represents
an extra passive redundancy for the load.
The graphical LC display used provides for versatile use and easy
operation. Such a convenient feature as an emergency power off contact
round out the standard interface selection (USB, RS232, communication
slot).