Re: OT---Simple Electrical Question?

Posted by John T on September 12, 2011 at 05:09:35 from (173.243.181.15):

In Reply to: Re: OT---Simple Electrical Question? posted by Stephen Newell on September 12, 2011 at 03:46:16:

1) Typical 3 phase secondary transformer voltage configurations are:

480 Y 277 volt three phase 4 wire (it has 480 three phase plus three legs of 277 volt single phase often used for lighting)

480 volt three phase three wire DELTA

2) Typical 240 volt three phase configurations are

120/240 volt three phase four wire center tapped Delta knows as high leg or red leg delta

240 volt three phase 3 wire DELTA

3) Typical 208 and 120 volt 3 phase

208 Y 120 volt three phase 4 wire it provides 208 three phase plus 3 legs of 120 volt single phase

THERES NOT ANY TYPICAL SERVICE THAT PROVIDES 480 AND 120 VOLT, IF YOU HAVE ONLY 480 YOU USE A DRY TRANSFORMER TO OBTAIN THE 120 OR 240

IF THE UTILITY ISNT PROVIDING THREE PHASE SERVICE THEN YES YOU MUST USE A PHASE CONVERTER

John T

Replies:

• Re: OT---Simple Electrical Question? Stephen Newell 07:07:42 09/12/11 (2)
  • Re: OT---Simple Electrical Question? John T 07:41:12 09/12/11 (1)
    • Re: OT---Simple Electrical Question? Stephen Newell 13:27:09 09/12/11 (0)

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