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Three Phase Generation and transformer



Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Hello All,

I am nearing completion of my 3 phase 20KVA Diesel powered generator. Yup, Portable power! The generator is currently wired 277/480V Wye. I have a 480v delta to wye step down transformer which would then be 208/120 (with neutral). My HV supply wants to see 208v 3 phase and a neutral which in turn supplies 28KVDC.

* is it ok to connect the generator 480v wye (sans neutral) to the Delta Primary of the step down transformer? * If so, how should the wye generator, delta-wye step down transformer, and wye HV step up transformer be grounded?

Does anyone know?

Thanks,
Jim Mora