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| Subject - 220V Single Phase from 460V 3 Phase? | |
| WMI Service |
Quick question... Is it possible to get 220V Single Phase from a 460V Three phase source? Thanks! Todd WMI |
| Scott Vickrey | If your load is small you won't need a big one. What are you trying to feed? |
| JimmyDee | Yes, with a dual voltage single phase transformer. Jim |
| WMI Service | Guess I should have been more specific. I need to do it without a transformer... Todd |
| Scott Vickrey | You can't get 220 from a 480 three phase power source without using a transformer. |
| WMI Service | Thanks! I was hoping to do it without a xformer, guess I'll have to get one. Todd |
| WMI Service | quote: Its a small Thermal Welding machine for Vinyl Profiles. 220v Single phase, about 450 Watts. My customer only has 460 (440) 3 Phase power available, and I was hoping to save him some $$ Todd |
| JimmyDee | I'd have to look up the acceptable loading but I think you could get by with a 500 va transformer and the cost shouldn't be too out of line. What is he using for lighting and convenience outlets? Jim |
| JimmyDee | After checking the code, the only thing I see in it for oversizing the transformer to bigger than the load is for a fire pump and that would be 125% larger. I think a 500va transformer will do just fine in this case. Jim |
| WMI Service | quote: Not really sure what he's using for lighting or other outlets. Guess he'll have to pony up for the transformer. Todd |
| David Hyatt | You all really have a broad knowledge of things. Some of the topics I have never even heard of, and you can still answer. Where does all this knowledge come from. I guess it comes with age.  I wish in my apprenticeship I did more industrial and heavy commercial. My apprenticeship only lasted about 5 years or 6 years then I went in buisness for my self. There is still alot I need to learn, and this forum is the place to do it.As far as transformers a heavy loaded transformer is more efficient than an over sized transformer.(not over loaded) but heavy loaded. |
| Scott Vickrey | There has to be 220 or 208 panel there somewhere other wise they wouldn't have any 120 volt receptacles. If they have 208, most equipment rated for 220 are also rated for 208. If so 208 should be listed on the equipment or manufacturers paperwork. Good point Jim. |
| JimmyDee | quote: One of the things I've found through the years is that no matter how much you know, you aren't even close to knowing it all. One of the things I have enjoyed is to answer questions, mostly my own. I love books and love to study things on how things work. You are correct in saying this site is a great place to learn. Any time one can get together with the brain power, from all over the world, that is represented here, you have to learn. I have an electrical student that is registered here and he has answered a few questions. He has been told that following the threads here on construction knowledge and looking up the answers in the NEC will almost assure him passing the code and theory part of the Mich Jr Electrical license exam. I really believe that. Jim |
| Scott Vickrey | This place fills voids in my electrical knowledge all the time. I have had limited experience in residential work and this barrier is chipped away daily by contributers that are well versed in this area. I am certain the people asking questions are not the only ones benefiting from our efforts. Rather, it has been my experience that the more you participate the more you learn. I have found that if I make a mistake in my posts someone will feel it their duty to point that out. This highly targeted refining of my knowledge is incredibly effective. It leaves enough of an impression on me that I don't readily forget it. I just have to be able to take the correction with the correct attitude. I believe that if you were to add all that humans knows we would be lucky if this made a percentage point of what there is to know, So there's nothing wrong with not knowing.Moral: Chime in and feel free to blunder.
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