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OCU Group | Annual report and financial statements 2025
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An example of how we are realising the market opportunities OCU Regulated Power
Case study | Regulated Power
Enhanced Electrical Capacity for Science Centre
Oxford | Scottish and Southern Electricity Networks (SSEN)
Framework project overview OCU was appointed by Scottish and Southern Electricity Networks (SSEN) to design and deliver a comprehensive
Challenge Early-stage design assessments revealed that the existing site drainage system was not sufficient to support the planned substation upgrade. This presented a major construction risk, with potential impacts on both project timelines and long-term operational performance. In addition, the site’s scientific and safety-critical setting required meticulous planning, stringent health and safety measures, and minimal disruption to existing operations.
Solution OCU worked collaboratively with SSEN and site stakeholders to develop a site-specific sustainable drainage strategy. A bespoke soakaway system was designed and installed to manage surface water in compliance with environmental standards. Concurrently, the electrical infrastructure upgrade progressed through multiple co-ordinated phases. This approach ensured construction progress was maintained without compromising safety or resilience. Planned electrical works incorporate the extension of the 132kV outdoor busbar compound, replacement of an existing 10/20MVA transformer with a new 15/30MVA unit, installation of a new 11kV switchboard within a custom-built switch room, and laying and commissioning of new 11kV cabling between substations.
Outcome The first phase of the upgrade focused on transformer replacement and initial commissioning and has been successfully delivered, significantly increasing electrical capacity across the site. Work is now progressing on the substation extension and final transformer installation, laying the foundation for future energy demands and supporting the Science Centre’s vital scientific work. The framework project demonstrates OCU’s capability to deliver complex regulated power upgrades in sensitive environments, ensuring long-term value for the client and energy security for high-priority infrastructure.
electrical infrastructure upgrade at Culham Science Centre, Oxford – home to one of the UK’s leading science and research campuses. The project supports increased energy requirements for current and future development across the site, contributing to the long-term resilience and capacity of this significant facility. Key facts • New 132kV/11kV 15/30MVA transformer installed and commissioned • Second 15/30MVA transformer installation underway • Purpose-built 11kV switch room and cabling solution delivered to specification • Full planning permission secured for all works • Fire risk assessment and mitigation measures implemented
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