Before I left my Machinist job we built a hydraulic test station for a factory in Mexico. It had 3 electric motors like those that Nick posted, and 2 more as backup. The unit was supposed to pump something crazy like 100,000 gallons a minute at 6000 psi. When we tested it for the customer we had to rent 3 large generators to provide power. They made the floor vibrate and the whole shop hummed when everything was running.
J.- those lines come in right from the BPA (Bonneville Power Administration). The 115k lines actually run to substations which then distribute the power to various parts of the mill. When doing any work around them with the 25-90 ton cranes, the operators have to keep the boom a minimum of 15 feet from the lines. I'm told the arc from those lines can jump about 10 feet to stuff like the crane boom.
There many things at the paper mill that require that kind of power. Just one example are the hydrapulper tubs. For simplicity's sake here: imagine a big-ass blender for beating up craft paper (grocery bags/concrete sacks/Kleenex box material) back into pulp. The tub is 20' in diameter and 20' deep. It's "blended" with 2 big rotors. EACH rotor is powered by a motor just like the one I posted.
There are a lot of motors down there with a lot more output than this one, but the 450 hp units are the biggest ones I know of that still basically look just like the 1-3 hp motors we all use... especially if you don't put something in the photo for a size reference.
What's REALLY crazy... Most of us here do a lot of pondering, shopping, and head scratching before we will pull the trigger on purchasing a 1-3hp motor... that's gonna cost somewhere between $100-400 right?
Well, two of these motors burned up in the last couple weeks. And there's always a new $35,000+ motor sitting in inventory... ready to get shoved in place as soon as the old one is ripped out.
There are literally THOUSANDS of 25-100 hp motors all over the place at the mill.