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An internally connected Dyn11 transformer can be changed to either Dyn3 , Dyn5 , Dyn7 , Dyn9 or Dyn11 transformer , by doing external changes on both sides of the transformer . Verify the above mentioned statement....
Dear all,
Dyn11 transformer can be converted to Dyn 3 ad Dyn7 by changing the secondary terminal marking. So, your statement is correct for Dyn 3 and Dyn 7.
For Dyn 1, Dyn 9, Dyn 5 secondary neutral must be re-wired, thus only external chage is not enough for these.
Regards
Vector group changing
Re: Vector group changing
