Three Winding Transformer
Three Winding Transformer
(OP)
We are intending to order a three winding transformer (72kV-13.8kV) and since it is on a remote facility, we also intend to use a delta tertiary rated for 600V to cater for normal small power requirements (a UPS and portable generator will provided to maintain vital power during transformer shutdown).
The transformer will be rated 50 MVA. The small power will only be rated at 250kVA. Will we able to specify this KVA rating for tertiary? I am just concern that there may be standard ratings for the tertiary depending on how big the transformer is.
Thanks,
The transformer will be rated 50 MVA. The small power will only be rated at 250kVA. Will we able to specify this KVA rating for tertiary? I am just concern that there may be standard ratings for the tertiary depending on how big the transformer is.
Thanks,






RE: Three Winding Transformer
RE: Three Winding Transformer
RE: Three Winding Transformer
Regards
Marmite
RE: Three Winding Transformer
Marmite's suggestion will be a better solution.
RE: Three Winding Transformer
This supports the posts by davidbeach and prc.
Bill
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"Why not the best?"
Jimmy Carter
RE: Three Winding Transformer
I have not seen a tank mounted auxiliary transformer as Marmite have mentioned. I would appreciate if you can provide me a single line representation of the that type of transformer for my undertsanding and a link as to where I can find an illutration of it.
I am intending to specify: Delta Primary - Wye Secondary and Delta Tertiary. Is this configuration standard as I have been used seeing a Wye-Primary, wye-secondary and delta-tertiary configuration.
Thanks.
RE: Three Winding Transformer
This approach has the advantage of more standardized, readily available and less expensive transformers in case anything fails.