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Power Transformers typical impedance values

Power Transformers typical impedance values

Power Transformers typical impedance values

(OP)
We are working on a project and need to define typical ( conservative ) impedance values for Delata-Wye and Wye-G, Wye-G, Delta transformers. Transformers are 18/25/30 Mva 230kV/34.5 kV. Where can I find these typical values?
I apprecite your responces.

RE: Power Transformers typical impedance values

Try the IEEE Red Book.

RE: Power Transformers typical impedance values

Also, there are standard impedance values given in ANSI C57 - based on the high side BIL. If you don't have access to ANSI C57, any transformer manufacturer can give you the standard impedances.

RE: Power Transformers typical impedance values

To know generally specified impedance values for transformers around the world, refer to IEC TR60909-2 ed2.0(2008-11) Data for electrical equipment for short circuit current calculations.

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