http://www.ec-engineers.com/ece_bec_submarine.html

It exists, but exceedingly rare and expensive. If you're serious, you should contact ABB as a starting point.

Yes, just made contact at NKT which I believe took over ABB's cable business. That Bayonne project was the only 345kv project that I could find when I had done some previous searches, it doesn't seem like there is much of a market for cable manufactures to go after.

Submarine ac cables have been installed for voltages up to 500 kV.
A 400 kV double circuit submarine cables link, 42 km long, 2 x 1000 MW, has been in service between Sicily and Italy for about 10 years. A total of 1032 Mvar of shunt reactors are installed for reactive power compensation.
A shorter link, about 5 km long, also at 400 kV, has been in service since 1985.
Three core 400 kV cables have also bene manufactured and installed in Scandinavia.
At 345 kV, it should be possible to attain about 90-100 km using single core cables.


Si duri puer ingeni videtur,
preconem facias vel architectum.

Contact Nexans also. They manufacture 345 XLPE underground cables [may be submarine also]

• https://files.engineering.com/getfile.aspx?folder=03ac86fb-1f14-462b-9c90-3