Also, if I remember correctly, the POCO primary was not a delta, but a wye, which I could not ever seem to explain to the POCO personnel we encountered.
Could the setup be an Open Wye?
...I'm gonna show my ignorance here,gang,..."Open Delta" means no neutral,..or am I mistaken??,..Please advise..Thanx,
Russ,
The Open Delta could be a 3 Phase 3 Wire setup (Grounded or Ungrounded), or a 3 Phase 4 Wire Grounded setup, which would include a Grounded Neutral Conductor.
Not a bad question! Most Open Delta "Vee" Setups discussed are targeted towards Motor Loads, but there are a lot of them in areas with Residential/Commercial customers fed from the same bank of Transformers.
Those would be 4 Wire Delta setups.
All the Open Delta connections I see, and have seen for years, are of the "Vee" configuration. Have yet to see any 3 Phase 3 Wire Open Delta "Tee" configurations on Utility Poles (excluding the Ancient Port areas of Long Beach, San Pedro and such, where 2 Phase systems were still in use in the 1980s. These would be "Tee" configs.).
Scott35
