High Voltage Electrical Case Studies

NHS Morriston Hospital Substation Design & Build Project

Tuesday, June 22nd, 2021

Morriston Hospital: Substation 3, Substation 4, Substation 6 HV/LV Upgrade

HV High Voltage Services, has delivered critical high voltage principal contractor projects for a number of NHS facilities and Hospitals in Wales and across the UK. These projects range from new substation design & installation to complete new private networks which include design, installation, through to commissioning and energisation.

We have a very good working relationship with the DNOs across the UK and have been involved in new electricity connections for various assets and are well positioned to deliver NHS high voltage infrastructure projects using our breadth and depth of technical and construction resources throughout the company.

The project at Morriston Hospital included designing and upgrading 3 substations, installing and jointing 11kV cable supplies and completing an LV cable diversion.

Scope of Works: Substation 6


HV Secures High Voltage Contract with Rhondda Cynon Taf Council for Ground Breaking Future Eco Park Development

Tuesday, October 13th, 2020

HV’s High-voltage division secures contract with Rhondda Cynon Taf Council to build a power network that will eventually supply a ground breaking new multi-million pound Eco Park Development – which would be the first of its kind in the UK

high voltage work at waste management facility

The High-voltage division of Welsh electrical specialist engineering firm, has been awarded the design and construction contract by Rhondda Cynon Taf County Borough Council for the high voltage electrical infrastructure required to support the development of a multi-million-pound Eco Park development at its Bryn Pica Waste Management Facility – the facility will be the first of its kind in the UK. (more…)

HV Power System Upgrade for MOD Defence Training Estate

Monday, October 8th, 2018

HV Power System Upgrade for MOD Defence Training Estate (DIO) – Kirkcudbright Training Centre

HV Power System Upgrade for MOD Defence Training Estate
HV Power System Upgrade for MOD Defence Training Estate – C&P Engineering Services has been awarded the high voltage electrical design and build contract by Landmarc Support Services for the replacement of the HV power system at Kirkcudbright Training Centre at Kirkcudbright, Scotland. Landmarc works in partnership with DIO (Defence Infrastructure Organisation) to manage the national Defence training estate.

MOD High Voltage System Upgrade – Project Scope:

The MOD high voltage system upgrade project will include designing and constructing a new private HV system, the excavation and installation of 20km of cable across watercourses, roads, forests and agricultural terrain. It will also include the removal of an existing overhead 11kV HV system, retrofitting with new HV electrical plant and installing 10 off 11kV package substations across a site that spans over 4,700 acres (1,900 hectares) of farmland. (more…)

Short Term Operating Reserve

Monday, January 8th, 2018

HV Awarded Contract for 30MW STOR Gas Generation Facility

Short Term Operating Reserve – Balancing Supply and Demand to the Grid

HV are delighted to announce that is has been awarded the design and build contract by Enersyst Limited (part of the Walters Group of Companies) for a STOR (Short Term Operating Reserve) 30MW Gas Generation Facility, located off Smoke Lane in Avonmouth, Bristol. (more…)

Pen Bryn Oer Design & Build Contract

Saturday, December 10th, 2016

Pen Bryn Oer Wind Farm Design & Build Contract – 6MW


HV were awarded the high voltage electrical design and build contract by REG WindPower for the Pen Bryn Oer Wind Farm, situated between Rhymney and Tredegar. The site comprised of 3 off Vesta V90 2MW Wind Turbines, generating 6 MW in total. Pen Bryn Oer is located between the towns of Tredegar (2km to the east) and Rhymney (1km to the south west) in Caerphilly, South Wales. It is located along a northern ridge of a hill of maximum elevation of 457 m above sea level.

Principality Stadium Electrical System Upgrade

Monday, October 31st, 2016

Electrical System Upgrade: Principality Stadium, Cardiff, South Wales

Principality Stadium: During November 2016, we were tasked with upgrading the electrical supply at the Principality stadium in readiness for the Wales Vs Australia rugby match to ensure greater reliability. The project involved establishing a substation to allow 3 off 1.25MVA generators to supply the 11kV ring.