Polypropylene Plant – Expansion of Drives


The DC drives with six-pulse rectifier, generate significant 5th and 7th harmonics and appear as a stress and skin effect on cable leading to insulation failure. A generally accepted method of coping with these problems is to de-rate all the electrical component even by 50%. This study highlights how the selection of a large capacity source transformer relative to the non-linear loads connected to it, would bring higher benefits in dealing with issues of not only harmonics but also voltage drops and heating of cables

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