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Answer Posted / mprajaneb
vector group testing: Assume that the terminals of the
primary windings are denoted as A, B, C in counter clock
wise direction and for secondary winding as a, b, c also in
counter clockwise direction. short circuit the terminals A
and a, and apply LT supply to the three terminals of HV
(Aa, B, C)
For Dy1 transformer: VbB = VcB and VbC grater than VcC.
For Dy11 transformer: VbC = VCc and VBb less than VcB.
For Yy0 transformer: VBb = VCc and VbC = VBc.
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