Submarine Power Cable
Sumitomo Electric has been pioneering and leading the world in the field of submarine power cables since 1920's. As of 1997, the volume of submarine cables manufactured and installed by Sumitomo all over the world totals approx. 1200km (750 miles). In 1998 Sumitomo installed the world's highest system voltage (500kV) and largest conductor size of 3,000 sq.mm (5,920KCM) for HVDC submarine cable in Japan.