Powering the Future of Energy
Innovative Solutions for HV and EHV Substations
Founded in 1998, ELLESFIELD LIMITED has been at the forefront of commissioning and installation activities and more recently HV plant and P&C design within HV and EHV substations. With nearly three decades of experience, we have successfully delivered projects across the Transmission, Distribution, and Renewable Energy sectors.
Our Journey and Expertise
Our commitment to technical excellence, safety, and innovation has enabled us to support clients on a diverse range of projects throughout the UK and internationally. By combining extensive industry expertise with a proactive and collaborative approach, we consistently deliver reliable, high-quality projects that meet the evolving needs of the power industry.
Services We Provide

Advanced Commissioning Engineers
Our TP141 Advanced Commissioning Engineers bring unparalleled expertise to complex projects, ensuring precision and reliability.

Protection Settings and Verification
We specialize in protection settings and verification, providing tailored solutions to safeguard your power systems.

HV Plant and P&C Secondary Design
Experience with the development and implementation of Protection and Control schemes; HV Plant and P&C Design including CDAE (HV Plant and P&C capabilities)

M&E Installation
Mechanical and Electrical installation and assembly of Air Insulated (AIS) and Gas Insulated (GIS) switchgear, including associated protection and control equipment. New-build and refurbishment works with safe systems of work, quality controls and experienced installation teams.
Our Project Highlights
- Lackenby 400kV s/s :- Dogger Bank C :- Installation and commissioning of 400kV GIS bay extension to facilitate the connection connect of a 1200MW
offshore windfarm to the National Grid Transmission System - Greystones 275kV s/s :- BESS :- Installation of 275kV AIS busbars and reconfigure of existing 275kV bay to enable BESS connection to National Grid substation
- Denmark :- THOR Offshore Windfarm :- Offshore Commissioning
- Lackenby 400kV s/s :- Sofia:- commissioning of 400kV bay extension to facilitate the connection connect of a 1400MW offshore windfarm to the National Grid Transmission System
- Creyke Beck 400kV s/s :- Dogger Bank B :- commissioning of 400kV bay extension to facilitate the connection connect of a 1200MW offshore windfarm to the National Grid Transmission System
- Creyke Beck 400kV s/s :- Dogger Bank A :- commissioning of 400kV bay extension to facilitate the connection connect of a 1200MW offshore windfarm to the National Grid Transmission System
Our Clients
What Our Clients Say
★★★★★
“ELLESFIELD LIMITED “Consistently delivers exceptional results. Their expertise in the Installation and commissioning in HV substations is unmatched, and their attention to detail ensures every project is a success”
Luke Sewal
Project Director – North
Infrastructure Delivery
nationalgrid
★★★★★
“The dedication and skill of the
ELLESFIELD LIMITED team have
been instrumental in the success
of our projects. Their commitment to quality and safety is truly commendable.”
Andrew Dodd
Lead Project Manager
Infrastructure Delivery
nationalgrid
+44 (0)7930 420657
Reach us by phone for immediate assistance.
enquiries@ellesfield.com
Explore our range of services
Partner with Ellesfield for design, M&E installation and commissioning services.
+44 (0)7930 420657
Reach us by phone for immediate assistance.