Two Voltages Combined in a Distribution Board

I can't really read the image but if the 230vac is single phase, then I don't see a problem. However, I personally would not trust myself with the code interpretation and would defer to someone else in this forum who is more qualified.

That said, if the 230vac is 3 phase then I might want to consider a separate panel.

I believe American households receive dual voltage supply because some appliances require different voltages , If you tap a phase on a 3 phase supply supply you also get a different voltage. Electricity is dangerous . Combing it into one distribution bov will be regulated by law - get a copy of the law of your country

The concept is certainly allowed by IEC, the execution (which we really can't see) will determine if you get the certification.

What we need to know is if the power sources are separately derived? And just what is the configuration of the power sources, such as are any parts of the supply circuits intentionally earthed?

This seems unnecessarily complicated as compared with a standard single panelboard that provides for both 220V and 110V circuits, where you have the option of placing 220V circuits all together, on one side or the other, or organize them into functional groups, with 110V circuits.

So to build something perhaps new, as opposed to just bolting two individual panels together, we might ask, why?

Why it wouldn`t be permitted? It is made to be used in USA where is 110VAC and in Europe where is 220-230VAC. I have a small old TV that have 220-230VAC and 12VDC switch, so you can power it up by car battery!

Combining 230 VAC and 110 VAC circuits in the same distribution board can be acceptable, but compliance depends on the actual panel design, segregation, protection, earthing arrangements, and applicable IEC requirements. Clear physical separation, suitable insulation and creepage/clearance distances, correctly rated protective devices, and proper labelling are essential.

From an electrical engineering perspective, the decision should also consider maintenance, isolation, safety, and whether combining both voltages provides a genuine practical advantage over separate panels. At VSS Power Engineering Services Ltd., we consider these design and safety factors when supporting electrical engineering and power infrastructure projects.

I agree with the point about needing to know how the supplies are arranged. Having two voltages in one board isn't necessarily the problem, but the separation, earthing and protection have to be done properly. I'd also want to know why they chose to split the panel this way in the first place. If a standard board can handle both voltages safely, keeping it simple usually makes maintenance easier.