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tranformer

tranformer

tranformer

(OP)
why dy11 insted of dy0

RE: tranformer

It's not the same:
11 x 30 deg = 330 deg, or (360-330)= -30 deg

0 x 30 deg = 0 deg.

RE: tranformer

Sorry, I meant (330-360)= -30 deg.

RE: tranformer

Dyn11 & Dyn1 are easy to build.  The plus or minus 30 degree phase shift in the terminal voltages of a Y1 or Y11 is inherent in the delta to wye winding configuration.  To do a Dy0 requires more phase shifting windings or a convoluted interconneciton of multiple secondary windings that is not practical.  If 0 degree phase shift is needed to match exisitng system phassing look at using YNdyn0 (small tertiary delta winding to handle 3rd harmonics) or a YN-yn0 transformer.

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