South Korea's First Integrated CLS for the Leading Cable Maker — Built in 9 Months
For the JN1 project — delivered for the COP (Jeonnam Offshore Wind Power Corp., JOWP) — Dimension designed, built and operated South Korea's first integrated Cable Lay System (CLS) for the leading cable maker: CPS-deployment quadrant + A-frame and a 10 m-burial Vertical Injector, believed to be the world's deepest cable-lay burial for power cables — all inside a 9-month window that also absorbed full cable-lay mobilisation and a retractable-thruster upgrade on the lay vessel.
Year 2024Region Korea · JeonnamProgramme 9-Month Concept-to-Offshore
Dimension Cable Lay System — CPS-deployment Quadrant + A-frame deployed off the CLB, JN1.
01First-of-Kind in KoreaKorea's first integrated CLS for the leading cable maker — CPS-deployment Quadrant + A-frame designed, built and operated by Dimension on JN1 for the COP.
02World's Deepest VI BurialIn-house Vertical Injector engineered for 10 m cable burial — believed to be the deepest cable-lay burial achieved for power cables worldwide.
039-Month WindowConcept, fabrication, FAT, mobilisation and offshore operations sequenced inside nine months end-to-end.
04Retractable ThrustersCable-lay system mobilisation paired with a thruster upgrade to retractable mode for shallow-water access.
Industry First
Korea’s first commercial offshore wind farm — Jeonnam 1 (99 MW, Shinan County). Dimension delivered Korea’s first integrated Cable Lay System (CLS) for the leading cable maker, paired with a 10 m Vertical Injector — in nine months.
Client of Project (COP)Jeonnam Offshore Wind Power Corp. (JOWP)
CountryKorea — Jeonnam
Year2024
Wind Farm Output99 MW · 10 WTGs
Key AssetCLB GL2030 · Dimension Cable Lay System (CPS Quadrant + A-frame) · 10 m Vertical Injector
Overview
JN1 Offshore Wind
For the JN1 Offshore Wind Project in Jeonnam, Korea, Dimension delivered a complete turnkey solution covering engineering, project management and offshore operations. The team pioneered the design of a custom Vertical Injector (VI) for efficient cable burial and executed a seamless shore-end pull-in combined with simultaneous cable laying.
Each export cable operation featured a 600 m float-out, precise barge beaching at KP 0.6, and nearshore vessel manoeuvring using advanced mooring patterns. Leveraging the in-house VI, Dimension achieved an impressive burial depth of up to 9–10 m — believed to be the world's deepest cable-lay burial for power cables, setting new standards for reliability and performance.
Technical Details
Technical Data
Parameter
Value
Export Cable Voltage
66 kV
Export Cable Diameter
165.4 mm
Export Cable Length
8.6 km per cable
Number of Lines
2
Total Cable Weight
≈ 602 tonnes
Burial Depth (VI)
Up to 9–10 m
Highlights
What Made It Notable
— 01
Korea's first integrated CLS for the leading cable maker — CPS-deployment Quadrant + A-frame designed, built and operated by Dimension on JN1 for the COP.
— 02
10 m Vertical Injector burial — believed to be the world's deepest cable-lay burial for power cables, achieved with Dimension's in-house VI.
— 03
9-month concept-to-offshore — incl. cable-lay system mobilisation and a retractable-thruster upgrade on the lay vessel.
— 04
Simultaneous shore-end pull-in & cable lay with 600 m float-out and KP 0.6 barge beaching.
Project Gallery
From the Field
Dimension-built Quadrant — lift into positionKorea's first fully CPS-deployment Quadrant + A-frame in operationCPS quadrant overboarding — vessel-side deploymentQuadrant deck operations — cable through the railCable handling — crew at the turn-over hoopVertical Injector — jetting test for 10 m burialCable with buoyancy modules — ready for float-outWTG foundation hand-off — A-frame to J-tubeCLB GL2030 in the nearshore approach — Jeonnam landfallJN1 landfall corridor — aerialJN1 project team — Dimension offshore crew
