Three winding transformers
Three winding transformers
(OP)
In a wye - grounded wye - delta transformer, how does load unbalance on the secondary (the grounded wye winding) reflect into the primary (ungrounded wye winding) and the tertiary (delta) winding? The transformer in question is a 15 MVA, 69 kV - 12.47 kV with a 30% delta 4800 volt tertiary.






RE: Three winding transformers
You would only get current flow in the delta during a ground fault.