[AMPS] Transformer Current ratings

[Jerry Flanders]

For "ordinary" old power transformers:

Is there a rule of thumb to help estimate transformer KVA capacity from the 
iron (or total) weight? If not, why?

Prior to hypersil, weren't most transformers made from similar iron in 
similar configuration? If so, wouldn't capacity be directly related to core 
weight?

Jerry W4UK


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