How to connect to a 3 phase network without neutral

Dear,

i hope somebody knows...
In belgium we have some electrical networks that don't supply a Neutral to the home.

So the network is 3x230V i.s.o 3x400+N ....

The shelly 3EM requires a N to be supplied ... probably to measure the voltage per phase.

Is it possible to power the 3EM without neutral ?
Worst case i need to wire it up as 1 phase... but then the information of voltage per phase will be lost so the wattage will be slightly of.
Or does the 3EM measure the phase between voltage and current ? if yes... it's unusable.

thnx...

So i tried ... powering the 3em in a one phase way...

but then the powerfactor (phase) is not correct.

So if we would be able to manually adapt/adjust/offset the phase we could get it to work in some way.

Is there a way to get the voltage & current history ... because this is always correct?

I think a Delta-Star transformer will not be the solution.
If I remember correct when using 1:1 transformer in delta-star configuration there will be a phase shift of 30° between primary & secondary.. resulting again in a bad powerfactor at measuring side of 3EM.