Case Studies

Delivering Specialist 220kV Subsea Transition Jointing in Germany

Challenge

• Managing the complex interfaces between the subsea and land cable systems, requiring precise alignment and preparation for successful transition jointing
• Delivering highly specialised 220kV jointing works in line with strict OEM (NKT) methodologies and international high-voltage standards
• Maintaining exceptional levels of safety, quality and compliance in line with German transmission project requirements
• Ensuring consistency and accuracy across all jointing activities to support long-term reliability of critical infrastructure

Solution

• Deployed senior, fully certified jointers with specialist expertise in 220kV subsea and transition jointing
• Utilised approved tooling, materials and OEM‑validated installation processes to ensure technical compliance and consistency
• Implemented robust quality control procedures, including detailed inspection, verification and staged sign-off at key milestones
• Carried out comprehensive testing of all joints, covering electrical performance, insulation integrity and continuity

Outcome

• Successfully completed installation of all 220kV subsea and transition joints to a high standard
• Delivered reliable, high-integrity connections critical to offshore energy transmission
• Achieved full compliance with safety, technical and documentation requirements
• Demonstrated capability in delivering complex high-voltage works for major European grid infrastructure projects