Back when I worked in a CO the engineering goal was to be able to run the building load on gen for at least 24 hours straight before getting fuel trucks. We had weekly gen tests to validate things were working as expected.
It could be that they had to de-energizd some equipment to perform inspection and work within the facility. I know our facility had a number of procedures on how to de-energize parts of the building and inhibit the generators from feeding that area (a lesson learned in the Hinsdale CO fire years ago).
During Hurricane Katrina a number of us had to invent a procedure for de-energizing non critical equipment to reduce power load in order to keep critical services running for an extended period of time since it was clear we werent going to get utility and resupplies for awhile.
It could be that they had to de-energizd some equipment to perform inspection and work within the facility. I know our facility had a number of procedures on how to de-energize parts of the building and inhibit the generators from feeding that area (a lesson learned in the Hinsdale CO fire years ago).
During Hurricane Katrina a number of us had to invent a procedure for de-energizing non critical equipment to reduce power load in order to keep critical services running for an extended period of time since it was clear we werent going to get utility and resupplies for awhile.