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Established in 1998, specialising in commissioning activities within HV and EHV substations.

Experience in the Transmission, Distribution and Renewable Energy sectors in the UK and overseas markets.

Expertise with producing power system protection relay settings and calculations.

A selection of projects completed and In Progress

  • Lead Commissioning Engineer, Hutton 400kV s/s:- Provision of Series Compensation equipment and protection on the Harker 1 and Harker 2 circuits in the form of 2 sets of three phase Thyristor Control Series Capacitors (TCSC). This installation is the first of it’s type in the UK and will assist National Grid to accommodate increasing power transfers from Scotland to England.
  • Lead Commissioning Engineer, Greystones ‘A’ & ‘B’ 275kV s/s:- 26 Bay Protection replacement including full substation software interlocking solution. New SCS system.
  • Lead Commissioning Engineer, Skelton Grange 275kV s/s:- New 275kV Dead Tank circuit breaker including bushing CT’s. New 275kV Disconnecting Circuit Breaker (DCB) and protection including Point-on-Wave controller.
  • Lead Commissioning Engineer, Ferrybridge ‘C’ 400/275kV s/s:- SGT1A replacement with a new 1100MVA unit and new line end Post CT’s.
  • Lead Commissioning Engineer, Bushbury-Penn 275kV circuit,protection upgrade using NICAP philosophy.
  • Lead Commissioning Engineer, Ferrybridge-Eggborough 400kV circuit, protection upgrade using NICAP philosophy.
  • Lead Commissioning Engineer, Amersham Main-Iver1-East Claydon 400kV circuit, protection upgrade using NICAP philosophy.
  • Lead Commissioning Engineer, 62MW Teesside Offshore Wind Farm :- 2 x 33/66kV transformers, 33kV switchgear and associated numerical protection relays.
  • Commissioning Engineer, Melgarve 400kV s/s :- New 10 Bay GIS s/s.
  • Commissioning Engineer, Melgarve 132kV s/s :- New 7 Bay GIS s/s.
  • Commissioning Engineer, Blackhillock 275kV s/s :- New 15 Bay AIS s/s.
  • Commissioning Engineer, Blackhillock 132kV s/s :- New 8 Bay AIS s/s.

Services

  • TP141 Advanced Commissioning Engineers.
  • Commissioning Engineers.
  • Commissioning Technicians.
  • Protection Setting and Verification Engineers.
  • Commissioning Documentation including Commissioning Switching program, Protection & Automatic Switching schedule, Thermal Rating schedule & ERTS strategies.
  • Test equipment available for hire.

Authorisations & Qualifications

  • Degree and Chartered Engineers.   
  • TP141 National Grid Advanced. 
  • TP141 National Grid Settings. 
  • National Grid Competent Person, ROMP and BESC substations.
  • Scottish and Southern Energy CAT 3. 
  • Northern Power Grid Commissioning codes.
  • ENW CLASS Commissioning codes.

Our Clients

Ellesfield has worked with a wide range of clients including ABB, Balfour Beatty, GE, EDF and Siemens.

Contact

Tel: +44 (0)‭7930 420657‬

Email: enquiries@ellesfield.com