DIN 42500-4 : 1995被替代
THREE-PHASE OIL-IMMERSED DISTRIBUTION TRANSFORMERS 50 HZ, FROM 50 TO 2500 KVA FOR EQUIPMENT NOT EXCEEDING 36 KV - DETERMINATION OF POWER RATING OF A TRANSFORMER LOADED WITH NON-SINUSOIDAL CURRENTS
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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