Must have been ten years ago now, but when we were looking to bring 3ph into our farm it was going to cost about $60,000 to go less than a mile. A short time after the utility company decided they wanted us to have 3 phase and offered to run it for free, new poles and everything. So now we have 480v 3phase. We have a ton of motors that are running all the time though versus crop farming where the demands are seasonal.
Make sure you get the solid state relays for your motors, they are expensive but very sensitive. The sensitivity can be annoying at times, but if you ever loose a phase you wont wreck your motors. We did loose a phase a couple years back and fortunately didn't have many issues, but man was it weird when it happened.
Also a vfd can run a standard 460 volt 60hz motor at anywhere from 1-60 hz. It ramps the 3phase voltageup and down, it is ssupposed to save energy on electric motors more so in a low load condition. Google abb, yasakawa, siemens, etc. They all make vfd's.
We run a VFD for our vacuum pump as do most dairy farms updated in the last 10 years. The savings are huge, enough times the thing literally stops. Not to mention you don't have to listen to the constant whine of the vacuum motor at full song all night.
Wow ... Do you really need 60HP for a well???? That's a huge fricken motor.
I would find out more info why that much HP is needed. Even 3ph is going to eat you alive in electric costs. 50kWh * .20/kWh is $10 per hour that it is running.
$240 a day for continuous use?
I am guessing he is doing center pivot irrigation which is generally not continuous. Most of those setups do run some massive pumps. He's also getting a significant ROI in his crop yeilds especially during drought years like 2012. Guys up here in sand barely got 100bph whereas the guys that irrigated were 200-250bph and with the way prices were then thats a big chunk of change.
Heres a 200hp irrigation motor.
http://www.ebay.com/itm/like/181178570883?lpid=82
Amps, watts, kilowatts, 3phase voltage(s), and conversions for hp etc. I am in way over my head. I need an electricity for dumbies...lol
It's all relative and pretty simple. Forget about HP and your life will be easier. The sooner everyone forgets the imperial system the easier life can be.
200 hours runtime:
You need a watertank, not a big pump.
You could make do with a much smaller motor with a big tank.
You need to consult with an irrigation specialist.
I'm curious, I have never seen a reservoir for a center pivot unless you are referring to CA's methods of irrigation.
Solar could make use of those pesky unirrigated corners of the field that the pivot system doesn't reach.
However, my experience is that in our climates here in Ohio and Pennsylvania, Solar barely pays back in 5-10 years. That's WITH the incentives. Then there is the hassle factor.
Finally, Solar is not maintenance free. MTBF on affordable panels and batteries is somewhere around 20 years, but getting better.
Farmers have better (more profitable) things to do.
In the midwest those "pesky corners" generally still yeild well unlike the plains or out west. Many graze animals on them otherwise.