ungrounded wye primary
ungrounded wye primary
(OP)
Can anyone give me the pros and cons of an ungrounded wye primary / grounded delta secondary. Currently their is grounded wye primary, we are looking to reefed and considering going with an ungrounded wye primary.






RE: ungrounded wye primary
Cons: Poor voltage regulation, particularly for unbalanced bank loads.
If you must use such a configuration to serve three phase loads, it is best to use the wye-delta bank to serve three phase loads only and provide a separate single phase transformer for things like lighting and outlets if these represent asignificant part of the connected load.
RE: ungrounded wye primary