Let us just remember Children,
The reason they have AFFD's in the US, is because it has a voltage of 120VAC to the sockets and the lighting circuits.
This would require twice the Cross-sectional area of circuit conductors, as opposed to 230VAC.
Some could also be Aluminium conductors.
There has also been anecdotal evidence in the US, that if you are unfortunate enough to live next door to a radio ham that uses RF power in excess of 500W eirp, you can have your AAFD's trip, when they use SSB modes.
Shnieder and other manufacturers have been trying to sort this out, with, seemingly no luck, thus far.
