Step Up Transformers
Step Up Transformers
(OP)
I have a question regarding step up transformers if someone could help please. I have searched the threads and not able to get an answer to my query. Our plant has 33kV distribution from utility and we need to install emergency standby generators in case utility supply is lost. We are considering 4 parallel 1MVA 415V generators each with 415V/33kV step up transformers to connect to 33kV switchboard. My question is what would be the preferred winding configuration and earthing for the step ups. The 415 generator wye to be direct earthed and considering the step up transformer to be wye/wye with the 33kV side direct earthed. Does this sound feasible. Could have delta on the 33kV side and separate earthing transformer, but looks unnecessarily complicated. The 33kV is distributed through the plant feeding a number of delta/wye step down transformers. Are there any potential issues using the wye/wye step ups with the direct earthing on 33kV side?






RE: Step Up Transformers
Bill
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"Why not the best?"
Jimmy Carter
RE: Step Up Transformers
Wye-Wye are best avoided. You can search for that topic on this website. You may also be best advised to engage services of a professional engineer, experienced in this area (MV systems and generator paralleling).
Rafiq Bulsara
http://www.srengineersct.com
RE: Step Up Transformers