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RWE Innogy's flagship Gwynt y Môr Offshore Wind Farm is currently the largest of its kind under construction anywhere in Europe.

When complete later in 2014, the €2billion project will consist of 160 turbines sited in Liverpool Bay and will be capable of generating enough energy to meet the average annual energy needs of around 400,000 homes.

GK Evans Electrical has been involved in the Gwynt y Môr project as one of RWE’s contractors since the early stages of the contract, when cable laying from Pensarn to a substation in St Asaph was taking place. At this stage a large compound, comprising offices, welfare facilities and storage units required a distributed power supply in addition to all the requisite flood lights and security installations, to ensure the health and safety of everyone working on the complex.

Following that first phase, the work moved to the construction and assembly of wind turbines at the Port of Mostyn. Here GK Evans was a sub-contractor for Alun Griffiths (Contractors) Ltd who were constructing the turbine base. This part of the project required the setting up and distribution of electrical power supplies to assembly production areas, portable offices housing over 250 staff and a large security flood lighting scheme, again to support the Health & Safety aspect of a large and fast moving 24 hour operation. Existing large scale cabling was re-routed and distributed through substation facilities, designed and built to ensure adequate power to all areas.

Haydn Royles, Senior Electrical Engineer for GK Evans said ‘Working with RWE on such a unique and demanding project has been extremely rewarding. To be part of Gwynt y Môr and see the progress that has been made in a relatively short period of time, has provided a unique insight into the world of renewable energy.

Our contribution has enabled us to demonstrate how effectively and efficiently we can operate, to provide a first rate service on a project the scale of Gwynt Y Môr. We strive to ensure high standards of electrical safety and operational efficiency are provided and as a local company, GK Evans Electrical is delighted to be a part of this ongoing success story.’


(1) Energy predicted to be generated by the proposal is derived using wind speeds monitored in the local area. This enables a calculation to be made to estimate the average annual energy production for the site based on 160 turbines each of rated capacity 3.6 MW. The energy capture predicted and hence derived homes equivalent figures may change as further data are gathered. Equivalent homes supplied is based on an annual electricity consumption per home of 4700 kWh. This figure is supported by recent domestic electricity consumption data available from The Digest of UK Energy Statistics and household estimates and projections from the UK Statistics Authority.

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