Am I to understand that your elv system is a two wire insulated return and your voltage is floating above earth.
If this is the case you should have an earth leakage detection system. This would ensure that your elv system is electrically sound.
By having an isolation transfomer in your shore...
In my humble opinion the best materials for pump manufacture, for centrifugal pumps, pumping sea water are as follows:-
Pump casings..................Ni-Al bronze
Impeller, shaft, shaft sleeves (if fitted), and wear rings are preferably one of the super alloys like monel.
Having worked with...
