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Transformer Vector Group Advantages
Please specify the advantages of each vector group

Please specify the advantages of each vector group, and how to choose a particular vector group for a specific application. For e.g Distribution Transformers are having Dyn11, Generator Transformers are having YNd1 and Exication transformers for generators are having Ynd7 Why?

In case of distribution transformer the load current remains lag due to inductive load so the phase voltage to coinside with laging current the D to Yn 30 (lagging in voltage) used. the same case is for generator transformer.

Can anyone still elaborate the advantages of using vector groups?

>In case of distribution transformer the load current
>remains lag due to inductive load so the phase voltage to
>coinside with laging current the D to Yn 30 (lagging in
>voltage) used. the same case is for generator transformer.