aeffects (Electrical) (OP)
18 Oct 10 6:55
Hi all, this is my first post ever.
I have recently graduated, so in a way, I'm still studying.
I'm trying to find some kind of transformer impedance "range" for different types of transformers, to use in short-circuit calculations.
It's my understanding that, you never get to know the "real" %Z of a transformer in the "project" stage, not until you get to see its nameplate, and by the time you actually get to see the nameplate, you're supposed to be in the "construction" stage, so that's one of the reasons I'm looking for some kind of "design ranges". But looking on the net for information, I've come up with some questions:
1. When you order a transformer; can you specify the impedance?
2. How do YOU get your information when you do short-circuit calculation and it's a new project?
3. In IEEE std c57.12.00 and c57.12.01, it says that you can find the typical impedance values from the "Product Standards", what are these?
I would also appreciate if you could tell me which IEEE standards have this information. I've found that the color books may have this info, but also the C57 series and the NEMA standards, or if I have to get it from manufacturers (if this is the case, how?, web info or direct asking?)
Sorry if there are any grammatical errors, the thing is I'm from Mexico, and sorry if I ask too many questions, but like I said, even if I have graduated I consider myself to still be studying.
Thanks in advance, I would really appreciate any information, or at least a north to do more research, seriously thanks.