High Voltage (HV) system services include the design, installation, construction, and maintenance of critical power infrastructure, typically covering 11kV, 33kV, and 132kV systems. These services ensure safe and efficient power delivery for industrial, commercial, and renewable energy projects.

High Voltage Infrastructure Services

Pole Erection & Overhead Line Construction: Installation of poles and steelwork to support overhead lines (OHL) up to 132kV. This includes erecting transformers on poles, often requiring specific scaffolding or winching methods.

High Voltage Cable Laying: Installation of underground cables, including duct installation, open-cut, and trenching. Methods include using horizontal directional drilling (HDD) for challenging areas like rail crossings.

Transformer Installation: Turnkey services for transformer installation, including specialized scaffolding, positioning, and commissioning.

Substation Civil & Electrical Construction: Construction of substations, including the design and installation of electrical equipment, protection, and SCADA systems.

Underground Infrastructure and Duct Banks

Construction of Duct Banks: Design and installation of duct banks for underground HV cables, which provides protection and allows for future expansion.

Handholes and Manholes: Construction of electrical manholes for cable pulling, splicing, and maintenance. These are designed to support heavy-duty loads and provide secure, dry environments for cable racks.

Inspection and Maintenance

Ring Main Unit (RMU) Service: Installation and maintenance of Ring Main Units, which are critical for controlling and protecting 11kV/33kV distribution networks.

Testing and Commissioning: Rigorous testing of cables, switchgear, and transformers prior to energization to confirm the integrity of the apparatus.

High Voltage Inspection: Regular inspection and maintenance of high-voltage assets, including oil-filled equipment management and earthing system testing.

Safety and Compliance

Accreditation: Work is generally carried out by Lloyds NERS accredited and Independent Connection Providers (ICPs).

Regulations: Operations comply with Safety of Work Regulations, Electricity at Work Regulations 1989, and CDM 2015 regulations.

Environmental Control: Mitigation of risks such as PCB contamination in oil-filled equipment and oil spill management.