how to test a 3 phase transformer with an ohmmeter?

To test a 3-phase transformer with an ohmmeter, first ensure the transformer is de-energized and disconnected from any power source. Measure the resistance between the windings of each phase by connecting the ohmmeter leads to the terminals of the windings. Record the resistance values; they should be relatively low and similar across phases. Additionally, check for continuity and any short circuits by measuring between each winding and the transformer’s core or ground. Discrepancies may indicate issues.