inertia UPS are alive and well, and powering many modern day Internet data centres.
www.piller.com
in one of our DC's we have 3 ax 600kva Piller units, and are about to wheel in a second 2500kw Cat, but this is all chicken feed compared to what they run in The States in the REAL data centres.
I have heard from multiple people in the US that when California has power problems, they have been known to make calls to the likes of Intel and Google and ask nicely to pretty please fire up their 25,000kw+ of gens and feed the grid....
I just love those old machine shops, this pic I love, real power;
