Yep, 3 KW is the "minimum contract" (but still very common for small flats) though there are of course no fuses anymore but a current limiting switch that trips

Yep, 3 KW is the "minimum contract" (but still very common for small flats) though there are of course no fuses anymore but a current limiting switch that trips and that can be re-armed, it allows peaks of about 20% more than target, older versions of these switches allowed higher peaks, so when they started replacing it with the new version which is more "strict" many contracts were upgraded to 4.5 KW because the limiter was tripping very often. Traditionally the oven was (only in the last years electic ones have become prevalent/ubiquitous) gas-powered and that electric kettles are not common, so the typical tripping scenario is now electric oven cooking+ironing or (say) iron+dishwasher+washing machine.