Evacuation operation elevator control

In the event of a power failure, many elevator systems automatically switch to a so-called network replacement such as an emergency generator or a UPS. This guarantees an automatic evacuation trip to at least the next stop and the opening of the elevator door.

Evacuation operation elevator control


If the main feed of the elevator system fails, the UPS should be switched over automatically.


The PFD3-E12 monitors the phase voltage for total failure. The output relay switches to the UPS if the main supply fails. The car can be moved at the speed of evacuation due to the emergency supply.

Customer benefits:

  • space-saving and compact design in a 22.5 mm narrow industrial housing

  • two relay contacts for error display and UPS switching

  • Supply voltage directly from the measuring circuit

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