Very low voltage readings on 230V system

I moved my fluksometer v3 to my new apartment and can't get the readings rights. Previously everything looked fine, now the flmlocal interface shows just 0.7V on each phase and the dash graph shows 0W. Is there something wrong with the configuration or the wiring?

Images of the flmlocal gauge visualizations of no load and load on each phase:

My configuration:
Electrical system: 3 phases with N
Math: port1 + port 2 + port 3
Ports 1-3: representing each phase

flukso_all_phase_load.png81.13 KB
spiegelm's picture

I think i found the Problem, I'm using a different power supply:

Note: For voltage measurements the delivered power supply is mandatory.

Could anybody give me a hint how the delivered power supply looks like?