Generally the secondary wire gauge is a good indication.It is also useful to accurately measure the winding resistance, because much of the heat generated in a transformer is from the current flowing through the resistance. And usually the dissipation of that heat is related to the transformer size and mass. And there is information available about that.
|Thread starter||Similar threads||Forum||Replies||Date|
|S||How should I test a unknown power transformer ?||Test & Measurement||9|
|D||Putting an Unknown Transformer to good use||General Electronics Chat||6|
|Help Identifying unknown Transformer||Datasheets, Manuals & Parts Identification||9|
|B||Putting an Unknown Transformer to good use||General Electronics Chat||12|
|Replacing an unknown transformer||General Electronics Chat||10|