Answer Posted / ketan

i am ketan more (be electrical)

magnetic balance test
1) step1 given 400v R&Y PHASE ONLY. THAT TIME B PHASE OPEN
OR NOT CONNECTED SUPPLY

MEASURE VOLTAGE RY & YB & BR
READING IS RY=400V (GIVEN VOLTAGE)
YB= (3/4 RY) VOLTAGE
BR= (1/4 RY) VOLTAGE

THISE READING COME MEANS TRANSFORMER IS OK OR MAGNETIC
BALANCE OF PHASE IS OK

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