Role Overview
The Array Cable Jointer is the vital connective tissue of the UK’s offshore and onshore wind energy sector. While the export cable carries power to the shore, the array cables (typically 33kV to 66kV XLPE) form the complex inter-turbine network that collects power from dozens or hundreds of individual wind turbines and routes it to the offshore substation. Operating in highly challenging marine and remote onshore environments, the Array Cable Jointer is responsible for the installation, termination, and rapid repair of these critical collector networks. As wind farms scale up to 66kV architectures to reduce electrical losses, the demand for highly skilled, GWO-certified jointers capable of executing flawless terminations inside the confined base of a wind turbine is at an all-time high.
Core Technical Competencies & Industry Standards
The technical authority of an Array Cable Jointer is defined by the ability to execute flawless terminations within complex ring, radial, and branched configurations, alongside mastery of rapid response repair campaigns. Array cables are uniquely vulnerable to damage from seabed movement, anchor strikes, or installation stress, which can isolate multiple turbines and cause significant production losses. Specialist jointers are integral to the fault location process, coordinating with technicians using Time Domain Reflectometry (TDR) and acoustic methods to pinpoint damage accurately. They excel in outage minimisation by rapidly mobilising via Crew Transfer Vessels (CTVs) or Service Operation Vessels (SOVs) to execute high-quality repair splices within restricted and unpredictable weather windows. Furthermore, they ensure strict burial depth compliance, verifying installation parameters to protect the cable architecture from future exposed section hazards.
Key Responsibilities
- Inter-Turbine Cable Jointing: Executing 33kV and 66kV XLPE straight joints and terminations within the highly confined base of wind turbine generators (WTGs) and offshore substations.
- Network Configuration: Installing and terminating cables within complex ring, radial, and branched array configurations, ensuring optimal power flow and redundancy.
- Fault Location Coordination: Collaborating with diagnostic technicians using TDR and acoustic methods to rapidly locate subsea or underground array cable faults.
- Rapid Repair Campaigns: Mobilising quickly to execute emergency repair splices, managing vessel logistics, and completing high-quality joints within strict weather window dependencies.
- Burial Depth Compliance: Verifying installation parameters, ensuring cables meet the 1–3m burial depth requirements for protection, and coordinating remedial action for exposed sections.
- Environmental Control: Erecting and managing climate-controlled jointing habitats within the turbine transition piece, mitigating humidity and salt-spray to ensure dielectric integrity.
- Quality Assurance & Testing: Ensuring all terminations meet rigorous OEM specifications, and supporting HV Test Engineers during post-installation VLF and partial discharge testing.
- Safety & Marine Compliance: Maintaining absolute adherence to offshore safety protocols, WTSR, and emergency evacuation procedures during all vessel transfers and turbine operations.
Essential Qualifications
The Array Cable Jointer requires a robust dual-competency profile. Technically, candidates must possess a Level 3 NVQ in Cable Jointing and hold valid, manufacturer-specific training certificates (e.g., Pfisterer, Nexans, Prysmian, 3M) specifically for 33kV and 66kV systems. For offshore deployment, mandatory certifications include the complete Global Wind Organisation (GWO) Basic Safety Training (BST) suite, including Sea Survival and Marine Transfer. A valid offshore medical certificate (e.g., OGUK) is strictly required to prove physical fitness for isolated marine environments.
Desirable Experience
Jointers with proven experience executing 66kV terminations—the new standard for mega-turbines—command a significant premium over those limited to 33kV systems. Experience in rapid-response subsea fault location and repair, demonstrating the ability to execute flawless joints under extreme time and weather pressure, provides a massive competitive advantage and guarantees continuous deployment.
Career Progression Pathway
The career trajectory for an Array Cable Jointer is highly dynamic. Vertical progression leads to Senior Array Cable Jointer (taking on enhanced responsibility and complex fault repair) and Export Cable Jointer (progressing to higher 132-220kV voltage levels). Horizontally, they interface closely with Wind Farm Electrical Technicians for operational integration and HV Wind Farm Engineers for system design context. The foundational HV competency also allows for seamless transitions into general onshore HV Cable Jointing roles.
How Haupt Recruitment Supports
Haupt Recruitment is deeply embedded in the renewable energy supply chain. We understand that your specific 66kV manufacturer tickets and GWO certifications are highly sought-after assets. We partner directly with leading offshore wind developers, tier-one cable installation contractors, and specialist ISPs to secure you positions on the UK’s most prestigious wind farms. We negotiate premium rotation packages and day rates, ensuring your compensation reflects the harsh environment and critical technical expertise you bring to the array network.
FAQ Section
What qualifications do I need to become an Array Cable Jointer?
You need a Level 3 NVQ in Cable Jointing, specific manufacturer tickets (e.g., Pfisterer, Nexans) for 33-66kV systems, and mandatory marine certifications including GWO Sea Survival and an offshore medical.
What is the difference between an array cable and an export cable?
Array cables (33-66kV) act as a collector network, connecting individual wind turbines to each other and routing their power to the offshore substation. The export cable (132-220kV) takes the combined power from the substation to the shore.
Why are repair campaigns so challenging for array cables?
Repairing a subsea array cable requires rapidly mobilising vessels, locating the fault, recovering the cable, and executing a flawless high-voltage splice within very tight, unpredictable weather windows to minimise massive production losses.
What is the typical career path for an Array Cable Jointer?
Progression typically leads to Senior Array Cable Jointer, upskilling to become an Export Cable Jointer (working on higher voltages), or transitioning into broader Wind Farm Electrical Technician roles.
Why is burial depth compliance important?
Array cables must be buried 1-3 metres deep in the seabed to protect them from anchor strikes, fishing gear, and tidal movement. Jointers must verify this protection to prevent future exposed section hazards and faults.