Why is the Switch disconnector 2 pole device's operational voltage rating at 415V?

Or between one phase and neutral of a 400/690 volt installation.

Seconded, it is made by Germans, their factory planners are more open to this sort of thing, and boxes marked with a big spark sign und “ Achtung Lebensgefahr” ( - translates as "Attention -  Danger to Life" ) do not seem to spook their health and safety folk in the way it would in the UK.

The label says keep your fingers out, so you do. Non compliance will not be forgiven, well not by the electrons anyway.

I have even seen 690/1k2 on a big site, but that did have transformers at both ends and some funny 24V and earth interlock. Funny to see so many kw on a thin cable.

Or between one phase and neutral of a 400/690 volt installation.

Seconded, it is made by Germans, their factory planners are more open to this sort of thing, and boxes marked with a big spark sign und “ Achtung Lebensgefahr” ( - translates as "Attention -  Danger to Life" ) do not seem to spook their health and safety folk in the way it would in the UK.

The label says keep your fingers out, so you do. Non compliance will not be forgiven, well not by the electrons anyway.

I have even seen 690/1k2 on a big site, but that did have transformers at both ends and some funny 24V and earth interlock. Funny to see so many kw on a thin cable.