Most power supplies are switchable - or will work on both voltages. Check the PSU and also that the cabling is suitable for 240V. If it's brown and blue and 0.75mm or larger, then it should be fine for 240V, but if it's black and white, then the insulation may not be suitable for 240V and it should be changed out.

I would fit a smaller breaker - or a fused outlet so that you have a local fuse or breaker at a value that will protect the cabling and appliance.