Just got a DMG Mori machine delivered and it calls for supply power of 400V x3, N, PE (protected earth) 50/60Hz.
My shop has 208/120 3phase power and I was planning to buy a local 480V to 208V delta Wye transformer and simply backfeed it as well as adjusting the taps to get below 440V.
Wiring diagrams for the machine say this:
"Isolating transformer necessary if:
--- voltage <360V
--- voltage >440V
--- TT main
--- IT main "
With losses from backfeeding the transformer, I should be close to 400V on tap7 according to the diagram: https://i.ebayimg.com/images/g/HGMAA...nC/s-l1600.jpg
But with the machine requiring a Neutral, is it possible to wire the high voltage side of the transformer in WYE configuration also ?
I read several threads on here before making this post, I just need advice on this specific application.
Any help is much appreciated!
-Sean
My shop has 208/120 3phase power and I was planning to buy a local 480V to 208V delta Wye transformer and simply backfeed it as well as adjusting the taps to get below 440V.
Wiring diagrams for the machine say this:
"Isolating transformer necessary if:
--- voltage <360V
--- voltage >440V
--- TT main
--- IT main "
With losses from backfeeding the transformer, I should be close to 400V on tap7 according to the diagram: https://i.ebayimg.com/images/g/HGMAA...nC/s-l1600.jpg
But with the machine requiring a Neutral, is it possible to wire the high voltage side of the transformer in WYE configuration also ?
I read several threads on here before making this post, I just need advice on this specific application.
Any help is much appreciated!
-Sean
