DMG DMU 50 Retroftiing(?) help

Yes indeed. L and N is connected between two phases in the distrubution box. The wires are still brown and blue, and any switch or socket is still marked L &N though.
It kinda threw me for a loop when i first moved here from Sweden. It never crossed my mind that there were different ways of delivering household electricity. I get three phases from the supplier in to my house. In addition there is a PE pole staked in to the ground outside, and a PE cable that run in the my distrubution box. On older houses it is common to still the the PE line connected to the copper water pipe.

Just to add to the confusion, here are some more pictures.

Wires coming in to my house. 3 phase, no neutral.
 

Installation certificate in my distribution box:
 

A 3phase connector:
   
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The elbow grease is paying out. starting to look less and less like a rust pile
I also remounted the Y + Z axis that I had to take of to fit it through the garage doors.



I found this drawing on the backside of the lid for the junction box for the spindle.


If im not mistaken is diagram show a Y(Star) connection. It leads me to believe that the nameplate previously posted here checks out
Is there any risk to the spindle if connect up a 220V VFD configured as delta? Would be nice to see it spin I need to make up my mind if I should pursue to get the original spindle running (buying a VFD and try to get a 32 A line drawn in).

I also have the possibility to use a big transformer to get the line voltage up to 380. Although it would perhaps be more VFDs to choose from, they are quite expensive. Any tips/thoughts/ideas are very much appreciated.

/Peter

Excuse me, I'm using the translator.
It is the spindle that is connected to the VFD. For 8000 rpm you need about 400 volts and 280 Hertz. If you connect only 72 volts to the transformer, the RPM will be 1,430 U/min.