BS 7821-4:1995 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV - Part 4. Determination of the power rating of a transformer loaded with non-sinusoidal currents
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This document gives to the user guidance to determine the loadability of an oil-immersed distribution transformer, as defined in and covered by HD 428, in the case of load current with harmonic factors exceeding the maximum values allowed.
NOTE: In general this document is also applicable to dry-type distribution transformers
BS 7821-4:1995 Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV - Part 4. Determination of the power rating of a transformer loaded with non-sinusoidal currents