Hi
i sometimes have problems with ground relay tests failing, when my system connects to the grid.
I think the problem is, that my electrical installation is quite large and old and the isolation resistence between neutral and earth is just above 1 mOhm. If i disconnect the elctrical installation from the Multis, the ground realy test does not fail.
What does the Multiplus measure during the ground relay test ? Resistance between neutral and earth? What is the lowes value that it will accept?