What are the qualifications to be able to use Delta to Y(T) conversion or vice versa?

Thread Starter


Joined Oct 18, 2011
Extra problem from professor. I need to identify all of them, as soon as I started quickly realized that I dont know which one can and cannot be used. There seem to be lots of different possibilities. So I want to know what are the requirements. The book does not seem to (or i keep missing it) to say, just what it is and how to transform, which is easy enough. As always thanks ahead of time :)

Here is the problem: