Hi Eric,
Gotcha, done a bit of gooling and reading.
It would appear as if the voltage rating has little to do with the matter providing the voltage of the fuse you select exceeds the voltage you require AND that the current rating is the same, no problems. It would appear that as a fuse generally blows quickly that it is more a function of time vs. current.
In my case a 20A 12V or 220V for that matter should do the trick. The secondary winding has a wire diameter of ~ 3.0mm that could take about 32A @ 4.65/mm2 so that should more than protect it.
Any further thoughts.
Thanks
Andrew