Transformer Selection
Transformer Selection
(OP)
When selecting a transformer for a job does the connection have to be taken into account, Dy1 Dy11, ect..., this transformer is for a 2.5MVA 13.8kv/600
I have done some reading and I can only find information telling me that this matters when hooking up transformers in parallel, if it's just a single transformer it does not really matter.
If someone could point me to some other reading materials or information that would be great.
Thanks
Hank
I have done some reading and I can only find information telling me that this matters when hooking up transformers in parallel, if it's just a single transformer it does not really matter.
If someone could point me to some other reading materials or information that would be great.
Thanks
Hank






RE: Transformer Selection
RE: Transformer Selection
"The Whys of the Wyes"
Thanks
RE: Transformer Selection
RE: Transformer Selection
Very usefull document,
thnkx.
RE: Transformer Selection
Little more on this subject.
The senior engineer in the office is saying we have to evaluate the whole system to ensure we select the right vector relationship between the transformers. He says that if we don't do the analysis we could have inductive motor loads acting as generators. I didn't really understand this and skimming through that article didn't really help.
Senior engineer won't just say that the Dyn11 is standard and that's what we are using.
Any other input?
Thanks
Hank
RE: Transformer Selection
Goggle "tranformer connections". Or this attachment might help.
RE: Transformer Selection
What exactly does the senior engineer say needs to be evaluated about the system? What analysis is he talking about?
RE: Transformer Selection
Lets me ask another question.
Working with a clients power system. They currently have a 115kV to 13.8kV, 20MVA transformer installed, with a few 13.8kV to 600V 2.5MVA existing transformers. The have asked us to build a small plant with mostly inductive motor loads, biggest load being about 200HP, in doing this we are to specify a 13.8kV to 600V transformer in the 2.5MVA. What steps do I have to take to ensure a properly specified transformer for this system.
If I have missed anything that is critical to helping me out please let me know.
Thanks again.
Hank