Nice diagram. That is not a 100+ amp at 30V (secondary) transformer - too small. Why 30 volt? Because the rectified and filtered DC output from a transformer providing 30 volts AC would be about 42 volts, so I'm guessing the transform provides 30 v AC.
You *really* need to forget about building a supply that provides 60 amps output. It is a dangerous and expensive project, and you need to *know* what you are doing if you build one. It is *not* the kind of project where you can get a schematic from the internet and a bunch of cheap parts, connect them up and have a good result.
Ed