It's hard to believe that they wouldn't test the mains by doing just that.
I visited the NY LaGuardia TRACON recently - built perhaps 40 or 50 years ago? - and saw the generator & battery room, where they turn off the utility power every few months just to see whether things are working. So it's not exactly a new idea or an idea that other life-&-death-mission-critical operations don't dare use.
Comments
It's hard to believe that they wouldn't test the mains by doing just that.
I visited the NY LaGuardia TRACON recently - built perhaps 40 or 50 years ago? - and saw the generator & battery room, where they turn off the utility power every few months just to see whether things are working. So it's not exactly a new idea or an idea that other life-&-death-mission-critical operations don't dare use.