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3 phase voltges to neutral in a delta circuit

 
 
korbarm
 
Reply Tue 12 Jul, 2016 01:54 pm
In a 3 phase delta system A, B and C are the three lines and a neutral. B-line is the 208v or the high/wild leg while the other two are 120 v all measured to neutral. When you measure across line-A to line-C, C to B and A to B you get 240v. Why do you get 240v and not get 328 volts from B to neutral?
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Type: Question • Score: 0 • Views: 864 • Replies: 4
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dalehileman
 
  -1  
Reply Tue 12 Jul, 2016 04:03 pm
@korbarm,
Kor it has to do with phase relationships. Doubtless we'll get a more detailed explanation. Incidentally your first sentence doesn't make sense
korbarm
 
  1  
Reply Wed 13 Jul, 2016 07:49 am
@dalehileman,
I apologize, I was rushed. I was trying to explain it to a friend when I realized that the math would overwhelm him. I just told him "God made it that way to annoy you".
timur
 
  1  
Reply Wed 13 Jul, 2016 08:34 am
@korbarm,
The answer is in this picture:

http://ecmweb.com/site-files/ecmweb.com/files/archive/ecmweb.com/images/904ewBTBfig2.jpg

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dalehileman
 
  0  
Reply Wed 13 Jul, 2016 11:03 am
@korbarm,
Quote:
I apologize
Me too Kor, I hate math
Thanks to Tim for the diagram

Kor, like I mentioned, it's a phasing thing, they don't peak simultaneously
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