If you check the wiring diagrams on the plate under the drip tray you will see there are several options for wiring up the Azkoyen Bravo.
The mains lead has five cores – two black, one brown, one blue and one green/yellow striped.
I wired the mains plug according to the first diagram. Each of the three separate heating elements has 230V across them, and when they are all on 11A is drawn (UK sockets are good for up to 13A).
The option below is for supplier where there is 230V phase to phase. This does not exist in the UK.
If you wanted to use a three phase supply (230V phase to neutral, 400V phase to phase), the mains switch needs to be rewired so that each separate element is connected to one of the phases at one end, and neutral at the other (so there is 230V across each element).
In this case 4A is drawn per phase (12A in total).