Specialist Irish 110kV Cable Jointing ICP Works for Dunmanway Wind Farm

Last year, one of our specialist HV teams supported the Dunmanway Wind Farm project in Ireland, delivering Irish 110kV cable jointing, terminations and testing for Suir Engineering to enable completion of the ICP‑approved connection.

Scope

The project scope included installation of 110kV XLPE cable joints to UK and Irish HV standards, along with joint bay construction and cable preparation.

We delivered straight joints and cross‑bonded configurations to support the long‑distance EHV circuit design, covering all stages from sheath preparation and conductor crimping through to insulation rebuild and stress control.

Full 110kV HV testing was completed, with comprehensive ICP documentation provided to enable Suir Engineering to finalise the connection.

Challenges

The project involved several notable challenges that shaped our delivery approach:

• Working along extended and variable terrain cable routes where trenching, rock conditions and access had been identified as significant engineering challenges.
• Integrating works into an active ICP grid-connection programme with strict interfaces and sequencing.
• Ensuring that the highest levels of safety and quality for HV jointing in rural and constrained working environments are maintained.
• Maintaining compliance with 110 kV installation standards, particularly around cable bending radii, pulling tensions and joint bay specifications.

Approach

We applied a structured, quality‑driven approach to the delivery of the high‑voltage jointing works, ensuring compliance, safety and programme certainty throughout.

• Deployed certified 110 kV jointers with full manufacturer‑approved training, ensuring all installations met specification and OEM standards.
• Completed all jointing in clean, controlled environments to protect insulation integrity and workmanship quality.
• Worked closely with Suir Engineering’s civil and electrical teams, coordinating joint‑bay construction, cable preparation and testing windows to maintain programme momentum.
• Carried out all required HV pressure testing and insulation‑resistance checks prior to handover, confirming the circuits were safe and ready for energisation.

Outcome

Despite the complexity of the route and programme, the project was delivered to the highest technical and safety standards, achieving full compliance and a defect‑free handover.

• All 110 kV joints were installed in full accordance with OEM guidance and ICP quality requirements, with zero defects recorded during testing and inspection.
• The circuits were successfully integrated into the Dunmanway 110 kV grid‑connection scheme, meeting all ESB Networks technical compliance criteria.
• The project further strengthened our long‑standing partnership with Suir Engineering across major HV renewable‑energy connection projects.