44 replies to this topic

[Keinokuorma]

So technically the transformer layout I posted a few messages ago could be wired to produce either Electrician Dude's Delta connection, or two of my Wye connections, or up to 416V output with neutral in the center. Versatile, huh?

[slawomir]

[user=10234]Keinokuorma[/user] wrote:

So technically the transformer layout I posted a few messages ago could be wired to produce either Electrician Dude's Delta connection, or two of my Wye connections, or up to 416V output with neutral in the center. Versatile, huh?

What you've posted is a standard transformer with delta primary configuration and depending on secondary winding connectin it may be D/Y or D/D. Produced voltage depends on primary voltage and number of winding turns on primary and secondary side.

[gpedens]

Budget did you ever get your question answered on this one.  Three phase  208 is 120 phase to ground.  It sounds like you have a high leg delta.  It should have a orange colored. Do a google on high leg or wild leg 240 phase connection.  It is also in the NEC code. 

[Budget Appliance Repair]

Yes, it was discussed all in this here topic and was found to be exactly what you are saying.

Thanks,

[gpedens]

Glad to hear it.  it was late and I was too lazy to read the whole thread.  I have seen some on this subject before and they tend to get quite long.   Mike Holt NEC code forums and news letters are an excelent source.   Delta systems can give funky terminal to ground voltages.  And connecting neutrals from different supplies can get you in deep shoo shoo.