I have a lot of questions about how to AC wire the Multiplus II in a 3 phase configuration.
Information about the DC side and how to put the Multplus II in 3 phase mode is clear.
Could also see in a list of Netbeheer Nederland the Multiplus II is an allowed device on the grid.
First question is the gridcode, what gridcode should I select here in the Netherlands?
Somewhere here I found an old post how explains the Netherlands doesn’t have its own gridcode and you should use the German one instead, is this correct?
In case of grid outage the Multiplus II will this way be disconnected from the grid by its internal isolation relay.
How does this work in a 3 phase configuration in a situation that only one of the 3 grid phases is missing?
Will in this situation all 3 Multiplus II be isolated from the grid or only one?
And how long will it take the Multiplus II to make an hard secondary net by grounding the neutral (internal relay)?
Grounding the grid neutral if the 2 other Multiplus II don’t go in isolation mode, would give problems.
So simple question do I need in an 3 phase configuration an phase monitor / isolation relay between the grid and Multiplus II AC IN?
Mine grid connection is a 3x25A (C type fuse) and would add the Victron system in series with mine home fuse box.
How to protect the Multiplus II, circuit braker, fuse 25A (type B ?) and RCD (100/300ma type A/B?)
In off grid mode we do have a weak net, how to protect AC out?
This weak net will not trip a fuse is case of a short, inverter will go in failure mode.
Makes a RCD more sense, and should you prevent restoring normal situation after inverter fault timeout?
Is there any guideline/ regulation how to do this the correct way?
Are there special needs in ground resistance, I know in Belgium they check this if an EV charger is installed.
I hope someone knows the regulation in the Netherlands and can help!
Thanks,
Ron
