Art. 450 references these but appears to only refernce them as autotransformers.

With a Harmonic Migating Transformer, 480Dx208Y120, this would go back to seperate derived systems, would it not?

This is my first time installing them, and they appear to be a just a zig zag Y. And should be bonding and grounded just like a standard 208Y120, would they not?

Any I did a search and there is not too much info about these here, anyone have any pointers?

Would these require double size nuetrals similar to a K Factor?

Dnk.......

[This message has been edited by Dnkldorf (edited 09-23-2005).]

Go to…
http://en.wikipedia.org/wiki/Zigzag_transformer

A zigzag transformer is a special purpose transformer. It has primary windings but no secondary winding. One application is to derive an earth reference point for Y-delta transform. Another is to control harmonic currents.

Read it all...

Also check out Scott's post:
https://www.electrical-contractor.net/ubb/Forum15/HTML/000072.html

Thanks, I found the link you refered to in a search. I was hoping someone installed some of these and had any pointers.

Thanks for your input.

Dnk......