Separation of copper and iron weights in transformers
Separation of copper and iron weights in transformers
(OP)
The transformer nameplates normally give the weight of core + winding together. Anyone has any idea in what proportion is this weight distributed ? Is assuming 40% is copper reasonable ?






RE: Separation of copper and iron weights in transformers
RE: Separation of copper and iron weights in transformers
Coming to edisons query-net weight of copper plus silicon steel will be total weight of active part divided by k. K will be 1.25 to 1.15.Trfs prior to 1975 k=1.25,1975-1995-1.2,after 1995,1.15.
Division of core by copper ratio will be 1.5-4 for two winding trfs and 1-2 for auto transformers.This depends on the loss capitalisation used at that time.If core loss to copper loss capitalisation rate is nearer to one,core by copper ratio will tend towards one.If it is high,core by copper will move away from one.
RE: Separation of copper and iron weights in transformers
I agree. It is time that trafo manufacturers quantify these separately on the nameplates.