Winding ratio measurement of three phase transformer

[bhushan233k]

Dear friends ,

can any body help me on how to measure winding ratio of 3 phase transformer with single phase supply?


Thanks...

 

[jiripolivka]

Use each transformer section separately like a single-phase transformer. Feed a nominal or smaller voltage to the primary an measure the secondary voltage. You can include the single-phase load, too.

The three measurements for each section should give close to equal results for a good transformer.