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saspm

Hi Guys,

I'm looking for some information or diagrams on Delta-Wye transformers. Most diagrams that I have got, give me information for 3 lines to a Delta configuration then on the secondary side you get the Star configuration.

I am really happy with the above concept, I would like to understand the more rural setup where 2 lines are used on the Delta side and how this would react to the Star side, typically 11KV to 400V.

Any help would be much appreciated.

Thanks,
 
Good question, not sure, theoretically 11KV 2phase Pri secondary 230V 1 leg strapped to earth? I don't know this is just a guess
 
That's how it was explained to me buy the REC. As there is no neutral available on the H.V. side two phases are use to give phase to phase voltage on the primary side and 230v on the secondary side. Similar arrangements can be found in control panels where two of the three phases 400v are used to provide 110v for a control circuit.
 
Thanks for the reply. I understand the phase voltage between the 2 phases, that's fine.

Its more the wiring and how the 2 lines would be connected on the delta side and how they would relates to the star winding's on the secondary side.

I have attached the standard 3 line delta wiring for information.

Just realized that this is in the wrong location on the site, sorry! I'm not normally a poster just a watcher.

Thanks again!

View attachment 35757

View attachment 35758
 
There is no Delta or Star side on the type of transformer you are referring to in your original post. There are only two line or phase conductors going in, you need three to make either a delta or star. This type has a primary side with 11kv and a secondary side with either 230v or to add to the confusion 460v center tapped to provide two single phase supplies at 230v.

try this link. http://www.gohz.com/how-can-we-get-1-phase-240v-from-3-phase-11kv-transformer
 
Thanks. Just had a look at the transformer in the field and that makes more sense.
 

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