Depending on the transformer use and configuration one of the ways to limit short circuit current is by using a neutral earthing resistor (also called a neutral grounding resistor). Fuses and similar protective elements also work well to limit the short circuit duration (and hence the let through I squared T power).
Try a search of CR4 for these terms as they have been discussed many times, alternatively try an internet search.
Tie Transformer
Re: Tie Transformer
