Freedom is accredited for all design and delivery work up to and including 132kV right through to the point of connection (PoC). Liaising with the local DNO, we arrange and co-ordinate the connection to the existing network. For IDNO connections we can deliver further savings.

Grid Connections

“You have a choice”, contestable connections works can be carried out by either the DNO or by an accredited contractor; known as an Independent Connection Providers (ICP). These require accreditation via the National Electrical Registration Scheme (NERS)/Lloyds Register; Freedom has full NERS accreditation upto 132kV.

As an ICP Freedom can carry out the following services under the contestable works;

  • Design Works for your new connection
  • Procure materials and plant for the connection works
  • Land rights negotiations with third party landowners (if required)
  • Trench excavation and duct installation – on site
  • Trench excavation and duct installation – on public highway
  • Construction of substation buildings and other civil works – on site
  • Cable Installation
  • Substation plant installation and cold commissioning
  • Excavation for jointing bay – on site
  • Excavation for jointing bay – public highway
  • Testing of assets installed by ICP
  • Recording of installed assets

Electrical Infrastructure

From initial design to final commissioning and testing, Freedom offers the complete electrical distribution package. Our engineers have extensive experience in the design and construction of electrical infrastructure distribution systems up to 132kV, Freedom can offer a “solution” to any electrical infrastructure project. Freedom’s capability covers an extensive range of disciplines.

Cable installations

  • 1kV and 5kV insulation tests
  • DC pressure tests up to 33kV
  • VLF cable testing


  • HV & LV winding insulation tests
  • Winding ratio checks
  • Bucholz testing


  • AC pressure testing
  • Ductor testing
  • CT’s – Ratio & flick tests, mag curves
  • VT’s – Ratio & polarity checks
  • Functionality checks





Tansterne 66kV 22MW Connection & Substation

The Brief

Freedom was required to connect a 22MW Energy from Waste plant to ensure qualification for the prevailing government funded renewable obligation certificate (ROC) scheme. This involved providing a detailed design and studies package including all contestable elements of the scheme as identified in the NPG Functional Specification.

The Approach

Freedom were contracted very early by the client to carry out the initial feasibility studies for the cable works; initially Freedom had to divert the existing 66kV Overhead Line to Underground, this would “loop in” the new 66kV Substation once constructed. Freedom carried out all the design works for the Substation (inclusive of Protection & Control philosophy) and gained approval from NPG.

The Delivery

The Freedom team delivered, before the deadline, a detailed design and studies package, 66kV substation 40mx30m compound c/w; x2 of 66kV Dead Tank CBs, x6 of 66kV Disconnectors, x3 sets of VTs, x3 Cable sealing end Structures, associated Busbar and clamps, Construction of an 11mx6m Control Room c/w x3 off Circuit Protection Panels.

The whole substation was commissioned and adopted by NPG a full 2 months prior to the RoC deadline date.


UK Power Networks


Dagenham Data Centre 80MVA 132kV Connection


Full turnkey design and build


South East

The Brief

The scope of work was the design and build of an 80 MVA 132kV connection to a new data centre in the UK Power Networks region. This consisted of new double 8km 132kV cable circuits, a new substation which contained: 132kV outdoor PASS MOH Hybrid Switchgear, 2 x 132/11.5/ 11.5kV three winding transformers, 2 x 11kV multi panel switchboards and the associated protection and control panels. This also included all civils works for a new switch-room, transformer plinth, and outdoor AIS compound.

The Approach

To facilitate the connection to an existing 132kV OHL terminal tower, Freedom installed its new POC-MAST™ which provided a quicker and cheaper final connection point. The POC-MAST™ element was delivered as part of the contestable works for UK Power Networks.

Freedom engaged their multi-disciplinary team to undertake the full turnkey design and build of this connection. The design, wayleave and installation teams worked closely together to ensure efficiency throughout the project to successfully meet the clients demands for this complex double-circuit connection. The project has been completed without any safety incidents and the contestable elements satisfactorily adopted by UK Power Networks without any loss of supplies to existing customers.

The Challenges

  • Multiple land owners, local authority and planning consents to negotiate for the installation of the 8km 132kV cable route and 132kV POC-MAST™ at the connection point
  • ICP design acceptance and adoption by UK Power Networks for the POC-MAST™
  • Negotiated access to UK Power Networks network to meet limited outage window available for POC-MAST™ connection
  • Complex data centre private network with the ability to export generated electricity.