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TO operate transformers in parallel, vector symbol of the
both should be same.If one transformer name plate is not
there, how can we conclude that whether the transformer is
having the same vector symbol or not?
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Answer Posted / mgalalkhedr
This vector group test is done at site to check if their is
any damage in the windings during transportation and
erection.
3 -phase AC supply is given on HV side. R-Phase HV and r-
phase LV shorted.
Then to qualify the test following conditions are to be
satisfied after measurement of voltages.
nR+nY=RY, By>> Bb and Yb=Yy.
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