pls can somebody help me with details on how to build a 2.5kva transformer.i will appreciate if it contains design detailsi.e size of core.guage of wire etc.thanks
When I was young, and my time was not worth anything, I have taken an E-core transformer apart and re-wound it to my specifications. You need to start with a transformer rated for 2.5kva, it will be big and heavy. You might find one in a junk yard or the power company might give you one that is defective (you are going to re-wind it anyway). You need to do some studying to know how the transformer works, what size wire will carry the current, etc.