> On Sep 10, 2021, at 1:33 PM, Warren Kumari <war...@kumari.net> wrote:
>
> The utility let them know that they were going to be doing some maintenance
> work in the area. No impact expected, but out of an abundance of caution,
> they transfer over to generators. After the utility lets them know that the
> maintenance work is all finished, they want to switch back. If the generators
> are "emergency power", and you need to switch back to "utility power",
> obviously the way to do this must be the big red button, clearly marked as
> "EMERGENCY POWER OFF", no?!
One of the many stories that came out of 9/11 was a switching center in NY City
that had a diesel generator as a power backup - which of course acted as
primary when the city power is off. After a few days of operation, it needed to
be refueled, so a truck was sent in carrying gasoline. The generator was
refueled and restarted, and - oops - diesel != gasoline. So then they needed to
bring in a new generator.
Yup, it happens, and it happened.
