Projects : Power Cables : Mull - France - Jersey - Guernsey Power Link
The installations comprised cable lay between the joint locations on both islands and the mainland and subsequently trenching of the cables to a minimum depth of 1.0 m below the seabed, where possible. Cable lay was carried out by Five Oceans Services' dedicated cable lay vessel Sea Spider, whereas the trenching of the cables was carried out using the Smartjet 1150. In order to minimize the risk of creating freespans during cable lay, touch down monitoring was carried out using the trencher as inspection ROV.
| Characteristics of the Cables: | ||||
| Type of Cable | : |
HVAC Cable Guernsey-Jersey |
HVAC Cable Jersey-France |
Fiber Optic Cable |
| Total Length | : | 27.5 km | 17.5 km | 45.0 km |
| Outer Diameter | : | 185 mm | 185 mm | 50 mm |
| Weight (in air) | : | 77.1 kg/m | 56.3 kg/m | 7.6 kg/m |
| Min. Bend Rad. | : | 5.0 m | 5.0 m | 1.5m |
| Max. Tensile Load | : | 57 kN | 57 kN | 52 kN |
In order to successfully complete the France - Jersey - Guernsey Power Link, Five Oceans Services utilized specialized cable equipment. The equipment utilized included, but was not limited to:
- Cable loading equipment
- Cable lay equipment
- Cable trenching equipment
In addition to the above, dedicated support equipment such as high accurate positioning systems (DGPS and USBL), as well as typical inspection and monitoring equipment (Sea Eye ROV and Innovatum Ultra System) ensured that a high level of confidence was achieved and maintained throughout the project.
