Quote:
Originally Posted by Brian Carlton
It appears that they have a single transformer for each phase. The 7200V lines each feed a single transformer and each transformer provides 120V to the street.
What I don't quite grasp in that setup is how they achieve the 180 degree split single phase when they do that. The three phase lines are 120 degree out of phase from each other and the split single phase lines are 180 degree out of phase from each other.
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Is it possible that the 220v is an RMS thing ? IIRC when you put an oscilloscope on an outlet you get a voltage of 180v peak to peak.
If its and RMS difference, maybe the phase shift doesnt make that large a difference.
(sorry, I do more PLC's than T&D projects)
-John