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Answer Posted / arun r
VECTOR GROUP TEST [For 3Ф Transformer Only]
1. HV Side RФ & LV -1 r Ф Short Provide.
2. 3 Phase 4 Wire Supply Applied In HV
Side.
3. For Following Voltages Measured Are In
Volts
RY YB BR RN YN BN
ry yb Br rn yn bn
Rr Ry Rb Yr Yy Yb
Br By Bb Nr Ny Nb
Rn Yn Bn Nn
VECTOR GROUP = Dyn5
PROOF
1. Ry=Rb 3.Br<Bb
2.By<Bb
4.Yy=Yb
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