UK’s first non-SF6 switchgear is energised through SP Energy Networks partnership with Lucy Electric
11 July 2025
In a landmark moment for grid decarbonisation, leading electricity network operator SP Energy Networks (SPEN) has energised the UK’s first non-sulphur hexafluoride (SF6) switchgear from Lucy Electric, marking a significant milestone in the UK’s grid decarbonisation journey.
The innovative Sabre EcoTec non-SF6 ring main unit (RMU) – which uses synthetic air instead of the SF6 greenhouse gas currently used to insulate critical electrical network equipment – has been installed and energised at a substation in SPEN’s Mid-Cheshire district.
The unique product – the only one designed to UK distribution network specifications – ensures lower emissions from network operations, addressing the challenge of a gap in available products ahead of the anticipated UK ban on SF6 in 2026.
Taking up the same space as traditional switchgear, Sabre EcoTec is also designed to fit within the existing substation footprint and can be directly mounted to the transformer, removing any need for costly adaptations.
This first installation is a vital step on SPEN’s journey to develop what it’s calling ‘truly sustainable substations’, which will be environmentally sustainable at every stage of development - from design through construction to operation.
It also cements SPEN’s long-standing partnership with Lucy Electric, which saw the network operator input into the design and product development process for EcoTec, alongside other UK distribution network operators. This collaboration has been key to ensuring the RMU meets SPEN’s current specification and future network needs, including automation technology as standard.
Eddie Mulholland, Process and Technology Director at SP Energy Networks said, “This is a huge milestone, not just for SP Energy Networks, but for our industry as a whole, as we strive to decarbonise the grid and support a cleaner and greener future for us all. It’s been fantastic to work with Lucy Electric to develop and deliver this innovative, sustainable, and cost-effective technology, which gives us the quality and performance we need without the greenhouse gas emissions. It’s a real win-win.
“As the only electricity network operator in the UK to serve communities across England, Scotland and Wales, SP Energy Networks is leading the way, and there will be more to come as we work with partners like Lucy Electric to deliver a better future, quicker.”
John Griffiths, CEO of Lucy Electric, commented, “Lucy Electric is proud to be at the forefront of technological development for utilities. Through close collaboration with trusted partners such as SP Energy Networks, we have developed and energised the UK’s first non-SF6 ring main unit, reducing emissions for UK network operators efficiently and cost-effectively. If implemented across the UK, EcoTec could save millions of tonnes of CO2 equivalent per year.
“We look forward to rolling out more EcoTec units to serve the growing package substation market in the UK and beyond. At Lucy Electric, we remain committed to ensuring our utility partners are prepared for future regulatory changes and contribute to Net Zero goals and wider societal benefits.”
Contact Details and Archive...