The swap to the emergency generator has been completed and a final test  with a sequence ~30 sec ENEL interruption -> generator intervention -> ENEL back -> generator offload has been satisfactorily performed.

Electrical situation is then back to default one.

A longer term solution for having the 2nd generator (GE 2) being able to serve both "UPS Central Building + UPS Computing Room + IPS  Central Building UTAs" and "IPS Central Building Chillers" is currently being planned (this solution is basically the first part of the generators parallelization that was already foreseen).