Everyone is quite helpful here, so thanks.
Installed Victron 240-240v 32-amp isolation transformer connected to Victron Autotransformer that steps down to 2 120v output legs and common neutral (50-amp "boat")
Isolation transformer actually increases incoming voltage to 250-volts so that my LE Enterprises high/low voltage protection pcb and selnoid will not connect to internal lines when shorepower is very good. It will connect if shore is dipping due to other users.
The power protection circuit must measure between L1 and L2 to decided if high or low. Why does the isolation trasnformer increase voltage (although fortunate in low shore situation)?
I do not wish to work
around the power protection circuit that is positioned boat-side of the two transformers. Any device that can help or a way to dial down output volatge of the isolation tranformer?