Can a Scott-T connected transformer be fed to go from two phases to three phases?
In theory, you can feed a Scott-T connected transformer with two phase power and derive three phases. However, the two phase feed would need to have the two phases offset by 90 degrees. In practicality, there are no two phase generators on the market that can provide this feed.
In some cases, this is discussed with an open delta system. Since an open delta system does not have the two phases offset by 90 degrees, a Scott T connected transformers can not be used in this application.