Dave55 — Zigzag transformers from drytype transformer producers are intended for triplen-harmonic mitigation and neutral ‘stiffening’ in {symmetrical} four-wire wye circuits. They would be a misapplication on the described 4-wire delta system, even it they were available for 240V. One type is the Acme ‘I-Trap’ with a nominal 208V rating—
www.acmepowerdist.com/pdf/Page%2041.pdf See also
www.electrical-contractor.net/ubb/Forum15/HTML/000072.html [This message has been edited by Bjarney (edited 10-30-2004).]
