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I had a water treatment plant out in the middle of BFE America. We tried some 10HP single phase 240v pumps and they just couldn't give a good reliability. The farmers electric coop wanted $27,000 to run 3 phase to the pumphouse. So, for the following 20 years, we ran a large box called a 3 phase emulator. It was basically a big box full of large a/c motor starters. It was solid state and worked quite well. It had one flaw we eventually fixed with a controller unit. If there was a lightning strike or other interruption in the 240v service, it shut down and would not restarted unless someone drove out and restarted it manually. We put in a special sensor box that would do a re-start on its own after a 5 minute wait. It would just keep restarting if there was a storm in the area. When that motor finally burned out enough where we could not rebuild it, we went with two, 10hp single phase 240v motors.
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Posted:Jan 30, 2009
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