| Shore Power
It appears from your description that the boat is rigged to accept a standard 3 phase 380/220 50 HZ. It is likely that the boat is also fitted with a distribution transformer. If so the neutral is not connected in the input. The three hots go into the transformer and three hots and a neutral come out. They selected that inlet configuration because it is a very common marina presentation in European. If the budget and the size of the boat will allow it a shore power converter made by ASEA or Atlas would solve all your issues. You plug the boat into anything and it deals with the conflict. The output of the shore power converter is constant regardless of the shore voltage, shore frequency, shore power quality. The other possiblity is to build a custom power transfer switch that would control the input taps of your existing transformer. This would allow for small voltage corrections in the output of the transformer. The parts necessary - Atlas or ASEA = $ 50k USD, Isolation transformer with tap switch 3K USD. It is much easier to have a 60 HZ boat go to a 50 HZ system than the alternative. Most of the marine manufactures build there equipment to be 50/60 tolerant.
|