Tractor Talk Discussion Board |
Re: OT - Pulling Single Phase from 3 Phase Service
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by John T on August 06, 2007 at 19:32:30 from (66.244.83.147):
In Reply to: OT - Pulling Single Phase from 3 Phase Service posted by Jim in DE on August 06, 2007 at 18:49:03:
Jim, Am I correct in assuming the 3 phase service you have is 480 Y 277 V 3 Phase 4 Wire Y grounded??? If thats so, its 277 volts from any leg to NEUTRAL and 480 VAC from line to line. That being said, if you need 240 VAC single phase, yes indeed you can theoreticaly (provided you can get a 277/240 transformer) use any of the three 277 legs (to NEUTRAL) and transform it down from 277 to 240 VAC single phase to run a 240 VAC single phase motor. NOTE your question is NOT correct in claiming you use two legs of your service to get 277 volts, if the service is what I think it is, as noted above, its 277 volts from any leg to NEUTRAL and 480 line to line. The other alternative is to use a 480 to 240 volt single phase transformer and feed its input line to line (any 2 phases) for the 480 and use the 240 volt as the single phase output. If your service is a 480 volt three phase three wire open floating Delta, THERE IS NO 277 VOLTS which is why when you mention 277 volts I took it to be a three phase four wire Y system which is 277 any phase to neutral but 480 line to line. I prefer where possible to balance the phases as best possible but you can still get by using a single leg of 277 to Neutral (or 480 line to line) to transform down to 240. You reallyyyyyyyyyy need to insure if the service is a 480 Y 277 volt three phase 4 wire or a 480 volt three phase 3 wire open floating delta (no 277 volts) ????????????? John T long retired electrical engineer n a lil rusty SO NO WARRANTY LOL
Replies:
Home
| Forums
Today's Featured Article -
The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co. All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|