Electrical Substations

SELT designs and constructs high- and medium-voltage electrical substations and National Transmission Grid connection infrastructure for renewable energy projects, delivering both new-build facilities and refurbishment projects.

High- and Medium-Voltage Electrical Substations

Our integrated approach covers civil works, electromechanical installation, electrical connections and automation systems, through to testing and commissioning.

The objective is to ensure the effective integration of wind and photovoltaic generation into the power system, delivering reliability, regulatory compliance and operational continuity.

Scope of Services

Civil and electromechanical design

Construction of substation yards, foundations, and technical buildings

Installation of HV and MV equipment

Construction of HV/MV electrical connections and earthing systems

Installation of HV/MV/ LV cables and cable terminations

Integration of protection and control systems, RTUs, and SCADA

Functional testing, commissioning, and energisation support

All activities are carried out in compliance with applicable technical and safety standards, ensuring effective coordination across civil, electrical and automation disciplines.

Operational Approach

The integration of civil, electrical and electromechanical expertise enables SELT to deliver projects under turnkey EPC contracts, maintaining direct responsibility for execution and continuous technical oversight throughout every project phase.

Risk management, detailed planning and effective coordination with all project stakeholders ensure reliable delivery schedules and high-quality execution, even in projects with complex permitting requirements and challenging environmental conditions.

Electrical Substation

Projects

Giannutri Solar Project

Electrical Substations

Pozzallo Photovoltaic Plants

Electrical Substations

Karalis 220 kV Grid Connection Substation

Electrical Substations

San Bellino Solar Park

Electrical Substations

Sandalia Solar Farm – Sonnedix

Electrical Substations

Nurra Wind Farm

Electrical SubstationsUnderground Cable Installation

Trusted by Industry
Leaders

SELT works in long-term partnership with leading European power transmission operators and infrastructure developers. Our key clients include utilities and national transmission system operators such as Terna (Italy), Elia Group (Belgium), RTE France and TenneT (the Netherlands), as well as leading renewable energy investors including Sonnedix and IB Vogt.