Submarine power cables

Estlink is a set of HVDC submarine power cables between Estonia and Finland. Estlink 1 was the first interconnection between the Baltic and Nordic electricity markets followed by Estlink 2 in 2014. The main purpose of the Estlink connection is to secure power supply in both regions to integrate the Baltic and Nordic energy markets.

planned interconnector to link Greek, Cypriot and Israeli power grids via the world's longest submarine power cable

Fenno–Skan is the designation of the high voltage direct current transmission between Dannebo in Sweden and Rauma in Finland.

NordBalt (also formerly known as SwedLit) is a submarine power cable between Klaipėda in Lithuania and Nybro in Sweden, operating since 2015. The purpose of the cable is to facilitate the trading of power between the Baltic and Nordic electricity markets, and to increase the supply and energy security in both markets.

SwePol is a -long monopolar high-voltage direct current (HVDC) submarine cable between the Stärnö peninsula near Karlshamn, Sweden, and Bruskowo Wielkie, near Słupsk, Poland. The link was inaugurated in 2000 and can transmit up to 600 MW power at a voltage of 450 kV.

The Kontek HVDC is a long, monopolar 400 kV high-voltage direct current cable between Germany and the Danish island Zealand. Its name comes from "continent" and the name of the former Danish power transmission company "Elkraft", which operated the power grid on the Danish islands Lolland, Falster and Zealand and had the abbreviation "ek". As of today, the cable is operated by Energinet.dk in Denmark and 50Hertz Transmission GmbH in Germany.

Konti–Skan (also known as Kontiskan) is the name of high-voltage direct-current transmission line between Denmark (DK1) and Sweden (SE3).

HVDC interconnection between Italy and Greece

HVDC power line between Sweden and Germany

transmission cable for carrying electric power below the surface of the water

submarine power cable between Spain and Morocco

SAPEI, is a high-voltage direct current power transmission system that connects Sardinia with the Italian mainland. The submarine cable from Fiume Santo to Latina runs at below sea level in the Tyrrhenian Sea. It is the deepest submarine power cable in the world. The cable is owned and operated by Terna.

power transmission line between Corsica, Sardinia and mainland Italy