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BS 7821-4:1995

Заменен
Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV, Determination of the power rating of a transformer loaded with non-sinusoidal currents — 8 стр.
ICS
29.180 Transformers. Reactors / Трансформаторы. Реакторы