Other Projects
Versatile Engineering for a Changing Energy Landscape
Explore TES Limited’s diverse portfolio of energy infrastructure projects. From renewable energy integration and BESS connections to DNO reinforcement and private network engineering, we deliver tailored solutions across the UK.
Detail Projects
Case Studies
Beyond the Grid: Engineering Solutions for DNOs & Private Networks
The energy landscape is evolving, and TES Limited is at the forefront of this transformation. While we are known for our transmission work, our expertise extends far deeper into the energy ecosystem. We partner with Distribution Network Operators (DNOs), renewable energy developers, and private industrial clients to deliver versatile, high-performance infrastructure solutions.
Whether it’s connecting a new wind farm, reinforcing a regional distribution network, or designing complex intertripping schemes for private assets, our team applies the same rigour and technical excellence that defines our National Grid projects













Adaptability
From brownfield refurbishments to greenfield renewable connections, we adapt our approach to your specific site constraints.

Technical Authority
Our engineers are experts in G59/G99 compliance, intertripping logic, and complex protection coordination.

Collaborative Approach
We integrate seamlessly with your existing teams, acting as a specialist extension of your workforce.
Distribution Network Operators (DNOs)
We provide critical engineering support to major UK operators, ensuring regional networks remain robust, reliable, and capable of meeting increasing demand.
Scottish Power Energy Networks (SPEN)
Our collaboration with SPEN has involved complex interface engineering and widespread protection upgrades.
- SCIS Interface Engineering: Delivered for the Cockenzie 400/275kV Substation and Edinburgh Containerised Substation.
- Protection Refurbishment: Comprehensive upgrades at multiple sites including Red House, Waverly Park, Thurcroft, Hawick, and Guardian Gloss Substations.
- Operational Intertripping: Design and engineering of bespoke schemes to enhance network stability and safety.
UK Power Networks (UKPN)
- Canterbury North 275/132kV Substation: Successful delivery of SGT LV Protection works, ensuring the ongoing reliability of this key infrastructure node.
Manweb
We have executed intricate reinforcement and protection projects to support network modernisation.
- Capenhurst Phase 2: Reinforcement works alongside Liverpool Reinforcement Works.
- Intertripping Schemes: Designed and implemented critical “Loss of Mains” intertripping at Rhyl, St Asaph, and Holywell Substations, as well as triangular intertripping at Gillmoss, Kirkby, and Bootle.
Renewable Energy & BESS Integration
As the UK transitions to net zero, TES Limited is a key enabler of green energy projects. We bridge the gap between generation assets and the grid, ensuring compliant and efficient connections.
Wind Energy Solutions
- Fullabrook Windfarm: Design of G59 Protection cubicles for Gaeltec Utilities, ensuring safe and compliant grid connection for renewable generation.
- Iberdrola / Siemens: Protection refurbishment for the Wylfa – Caergeiliog 2 132kV Feeder, supporting critical infrastructure links.
Battery Energy Storage Systems (BESS)
- BESS Connections: We provide specialist engineering for Battery Energy Storage Systems, a crucial technology for balancing modern grids. Our services include protection design and control interface engineering to facilitate seamless BESS integration.
Private Networks & Industrial Engineering
For private network owners and industrial clients, reliability is non-negotiable. We offer bespoke engineering services that ensure your high-voltage assets operate safely and efficiently.
- Siemens Services: We have acted as a trusted sub-contractor, producing detailed wiring diagrams and schedules for multiple large-scale projects.
- Kirby GIS Modification: SGT 1-4 LV protection and GIS/AIS interlocking modifications for Iberdrola, demonstrating our ability to work with complex Gas Insulated Switchgear systems.
- Central Networks: Protection refurbishment at Bushbury, Willenhall, and Wednesfield 132kV Substations.