My project is requiring a 200A service to go up the side of a mountain, and the engineer wants a step up transformer (208 to 480 single phase 50kva) set at the bottom of the mountain and a step down (480-240 single phase 50kva.) My question is, is it possible to step up a single phase transformer? I have been trying to simulate it with a single phase transformer in my shop but have only been able to get 456v on the secondary. I would appreciate any help. Thanks!
Make sure your 'engineer' has included long term core loss power in his trades!
Our poco will run the primary up the side of a mountain. Poco pulls primary in the 2-1/2 or 2" pvc conduit that YOU supply buried 42 in deep. You also pay for buried vaults every 400 feet and obviously pay for the 200 A service and meter box. Overall costs come to over 20 bucks a foot, took a BIG jump (nearly doubled - thanks Joe) a couple years ago. Also, any small bridges over streams, etc require RMC for that section.
Depending on power cost in your area, the core losses 24/7 of 2 vs one transformer, with YOU vs poco paying for core losses makes the 2 240/480 transformer solution a bad option over the long term, and power prices will only go UP.
PS: +1 Electro posted 'Rarely do people do a fair analysis of these" while I was typing