The Long Island Sound Submarine Cable Interconnection Operating Experience

This paper discusses the unusual operating experience of a 300-MVA, 19-km (12-mile), 138Kv, high-pressure, oil-filled submarine cable. This cable, installed in 1969 and described in IEEE paper 71TP183-PWR, has experienced, to an unexpected degree, corrosion and physical damage from external mechanical forces. The experience gained from operation of this cable may result in design changes and new considerations for future long submarine cables, especially in the areas of armoring, cable spacing, cable embedment, installation inspection, and cathodic protection.