winnie
Senior Member
- Location
- Springfield, MA, USA
- Occupation
- Electric motor research
That transformer has a delta primary and a wye secondary. The turns ratios of the individual coils are 440:127, so when you apply 380V to the primary you will get 110V on each of the three secondary coils, and 490V in the open delta boost configuration. IMHO the voltage numbers look good for your application.
The transformer secondary current rating is 65A, which is more than you need, so the current numbers look good for your application.
You would need to break the neutral connection of the wye to get 3 completely separate low voltage coils. For the transformers that I am most familiar with, this would requite breaking a welded connection, but it appears that there are 3 cables below the 'Y Neutral' terminal. So separating the coils might be trivially easy.
I don't know enough about 3 phase transformers to understand the implications of breaking the primary delta (only supplying 2 of the 3 primary coils).
Because you have 3 secondary coils, you could do the 'skew/stretched delta', but again I've not seen that in a textbook and don't know if there is a specific reason not to do so. The only benefit of this approach is that the resulting supply is symmetric around the grounded conductor.
As I said above, _you_ are the engineer on this project, I am a random guy on the internet making suggestions. The most I will commit to is that I don't see any show stoppers to your application.
The transformer secondary current rating is 65A, which is more than you need, so the current numbers look good for your application.
You would need to break the neutral connection of the wye to get 3 completely separate low voltage coils. For the transformers that I am most familiar with, this would requite breaking a welded connection, but it appears that there are 3 cables below the 'Y Neutral' terminal. So separating the coils might be trivially easy.
I don't know enough about 3 phase transformers to understand the implications of breaking the primary delta (only supplying 2 of the 3 primary coils).
Because you have 3 secondary coils, you could do the 'skew/stretched delta', but again I've not seen that in a textbook and don't know if there is a specific reason not to do so. The only benefit of this approach is that the resulting supply is symmetric around the grounded conductor.
As I said above, _you_ are the engineer on this project, I am a random guy on the internet making suggestions. The most I will commit to is that I don't see any show stoppers to your application.