Originally posted by: ArthurHall
The current in the primary will increase up to a point when it will be limited by the transformer impedance.
I would still recomend a fuse on the secondary side.
Are you making this unit? If so remember to make sure the outgoing neutal is earthed.
Also remember America is 60Hz and Europe is 50Hz so any motors will run slower.
No, I'm not making anything. I have a 200W 240-100V transformer bought commercially. This has a fuse on the casing, presumably for the output side.
But I saw another 240-100V transformer which was rated at 45W which had no fuse.
Is it to do with the difference in power?