How to take vector group test of a transformer? Suppose we dont know the vector

How to take vector group test of a transformer?
Suppose we dont know the vector group of transformer, how to
check its vector group through test? I have 3 transformer
DYn11 & DYno& Ynd11, how to confirm its vector group?

Question Posted / deepak

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How to take vector group test of a transformer? Suppose we dont know the vector group of transforme..

Answer / l.haridoss

DYn11 stands for star delta neutral @ 11o clock posiion
This can be explained by using vector diagram. at fouth
quadrant there is 30 degree angle inclination b/w LV & HV

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