Scope of Work
Categories:
Submarine Cable ManufactureSubmarine Cable InstallationSubmarine Cable Design
Lifecycle Stages:
DevelopmentConstruction
Quantities:106 km submarine cable (interconnector), 18 onshore_cables
Cable Specifications:
TypeHVDC
Purposeinterconnector
Voltage1 kV
Route Length53 km
Source text:
Moyle Interconnector metallic return conductors: two parallel low‑voltage HVDC return cables over a 53 km subsea route between Auchencrosh (Scotland) and Ballycronan More (Northern Ireland), installed as a long‑term repair to replace failed integrated return elements.
Contract Details
Client:
Mutual Energy
Description
Nexans (Norway) delivered the long‑term repair project to restore the Moyle Interconnector’s failed integrated return conductors by installing new separate metallic return conductors (MRCs). Following repeated faults on the low‑voltage return elements of the original coaxial HVDC cables, Mutual Energy selected a manufacturer‑led turnkey solution to add two new dedicated LV return cables between the converter stations at Auchencrosh in Scotland and Ballycronan More in Northern Ireland. The scope covered design support, manufacture, testing, supply, offshore transport, laying, burial, jointing and commissioning of approximately 106 km of subsea LV return cable (two 53 km circuits in parallel) and about 18 km of associated land cable on both sides. The new cables were connected into the existing HVDC system via transition joints at each coast, restoring the link’s full 500 MW capability by 2016.