Thank you both, Donald and Peter, for your replies. This solid-state voltage stabiliser that we are using--purchased second hand from a different source--can handle input from 187 to 260 VAC. The reading we took midday Sat. was 184 -- probably a peak time, everyone in the kitchen and such. Yet I was using it today and it there was no apparent problem. The stabiliser in question has two fuses. The one that keeps popping was a 1,6 amp fuse. I don't know if this is the correct fuse size for the unit -- but it came with the unit when we bought it second hand. But perhaps a slightly higher fuse rating (as per an earlier post) would do the trick. But is there a way to calculate what would be the max. permissible fuse to ensure the safety of the voltage stabiliser?