Was going to question where the power bus is.
Then thought better of it.
So ,don’t American breaker boxes use Power busses to mount the trips?
They are supposed to.
That particular series of breakers is DIN rail mount...
A former employer of mine used them in their controllers which were made in Finland. Just about everything in the box was DIN rail mount except for the cpu/io rack..
Of course the labels (in Finnish) were glued onto the doors. The folks at the US hdqtrs glued translated labels over them.