Transformers

What you are asking is not physically possible to answer, especially since transformers of this size are NOT an off-the-shelf item and hence the characteristics will vary depending on the design (and numerous other technical things I am not going to go into at the moment). Is this a homework question?

If you are seriously trying to locate and purchase a transformer go directly to the transformer manufactures or hire a consultant to generate a proper transformer technical specification (then send it to the transformer manufacturers).

Hi there

Thanks for your reply, I need just typical ratings, i am not designing anything just doing some calculations and simple simulations and therefore just want the results to be a little more actual than estimated values.

You can not do better than estimated without the transformer being built. If you have a worst case value that you want, then you need to specify that to the transfomer manufacturer. They can then test to make sure they are providing it. The manufacturer can not give an exact value on the transformer till it is built. I know, I have asked and got told that very same thing. So if you want a %Z of 5 then you have to specify it and the X/R ratio as well.

Hi there

Thanks for the info,

i just want the ratings for the existing transformers of the MVA that i have specified above just typical values.

About the best info you are going to find is on Square D's website. That is www.squared.com. I think that GE also improved their website to include more technical data. But they both will give the disclaimer about the above situations. Good luck

Thanks i will check them out now