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240/480 trans sizing

  1. Commercial Electrical Forum
    Have 240/ 400 amp service single phase supplied 100 kva transformer on pole. I need to go 480v 3 phase at 400 amp. I have to add a converter to get 3 phase. In order to get 480 I have to step up. How big of a transformer kva can I go and should it be before or after the converter and which...