... power transformer is More than flat items of test data volume core power transformer, triangular three-dimensional core structure ... transformers with same capacity,no-load loss dropped 50%,load loss decreased 80%, no-load current down more than 80% noise down 8dB (A) ... capacity transformers, no-load loss decreased by 25%, and load loss decreased 80%, no-load current drops more than 80%, noise down 8dB ...