ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Admin 4
Recent Posts
1913 American Electrician's Handbook
by annemarie1. 07/27/17 03:10 PM
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/24/17 12:20 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
Housebilding DIY wiring
Popular Topics(Views)
239,368 Are you busy
174,823 Re: Forum
167,215 Need opinion
Who's Online Now
0 registered members (), 42 guests, and 4 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#44751 - 11/10/04 08:38 PM Wye-Wye Diagram  
RobbieD  Offline
Member
Joined: Feb 2003
Posts: 231
Canada
Does anybody have a wye-wye connection diagram for a step up transformer. The transformer is fed 208V and the secondary feds a panel at 480V. It would be great if the diagram also shows the grounding and bonding connections.
Thanks in advance!


Work Gear for Electricians and the Trades

#44752 - 11/10/04 09:15 PM Re: Wye-Wye Diagram  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
 
If 480Y/277V service is needed, the most common transformer configuration will have a 208V-delta winding, served by a 208V 3ø 3-wire source — a neutral conductor is not used.

See “Group A” units at www.acmepowerdist.com/pdf/Page%2014.pdf

See connection 46 at www.acmepowerdist.com/pdf/Page%2055-63.pdf

Grounding of the HO terminal is the same as for other separately-derived systems, such as the more common 480-delta—208Y/120V unit.

Low-voltage wye—wye transformers can have problems with triplen-harmonic currents, so are not too common and should be carefully applied.




[This message has been edited by Bjarney (edited 11-10-2004).]


#44753 - 11/10/04 10:30 PM Re: Wye-Wye Diagram  
RobbieD  Offline
Member
Joined: Feb 2003
Posts: 231
Canada
Thanks for the info! Does anyone have a drawing for a wyw-wye transformer?As per my post.


#44754 - 11/10/04 11:15 PM Re: Wye-Wye Diagram  
Ryan_J  Offline
Moderator
Joined: Aug 2003
Posts: 1,374
West Jordan, Utah, USA
I found this thread in the "technical reference" area of this forum. If this isn't what you're looking for, you might search there.

https://www.electrical-contractor.net/ubb/Forum15/HTML/000065.html


Ryan Jackson,
Salt Lake City


Member Spotlight
TOOL_5150
TOOL_5150
Bay Area
Posts: 61
Joined: August 2007
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 14 (0.003s) Memory: 0.7598 MB (Peak: 0.8918 MB) Zlib enabled. Server Time: 2017-07-28 06:54:39 UTC