Case Studies

Pentir Dinorwig 1

Pentir Dinorwig 1

Project OverviewThe 10.5km circuit extends from SF6 Gas Sealing Ends within Dinorwig Power Station along a 1.1km tunnel; it then follows the route of Llanberis Lake Railway for approx. 4km along the edge of Llyn Padarn. The cable then follows the route of the A4244 back towards Pentir Sub Station where it crosses grazing land before finally entering Pentir 400kV Sub Station and terminating at outdoor CSE’s.   Circuit 1 & 2 are made available for maintenance each year by way of...

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Mybster GT5

Mybster GT5

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Blackhillock 400kV

Blackhillock 400kV

Some neat work on the Blackhillock 400kV Project by Dave Radley and the Team.  Images show the 400kV Road Crossing in Troughing inside the Siemens Compound completed by Approved Power Services Ltd.Images looking towards the ODSE and GIS ends. 

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Nexans 132kV Cable Jointing Trade Testing

Nexans 132kV Cable Jointing Trade Testing

 Last week four of our skilled HV Technicians completed a two day trade test on 132kV Aluminium core XLPE cable with a Nexans Representative.   The Testing took part at Approved Power Services Head Office in St Helens in our designated training area. The Testing involved :Day 1Demonstrating use of DMS and Alroc AMF toolingGroove and SC TransitionDay 2Manipulate DMS to Clean 50mm Outer Sheath and Flare The Main purpose of the Testing was to demonstrate and...

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Balfour Beatty – London Power Tunnel (LPT)

Balfour Beatty – London Power Tunnel (LPT)

Project OverviewNational Grid’s London Power Tunnel Scheme embarks upon a seven-year project to rewire the capital via deep underground tunnels, in order to meet increasing electricity demand and help London access the renewable energy of the future.A new network of tunnels are being constructed between 20m and 60m deep below the road network. The tunnels carry high voltage (400kV) electricity cables and connect existing substations at Hackney; St John’s Wood; Willesden and Wimbledon...

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VolkerInfra – Burbo Bank Extension / Bodelwyddan Unlicensed Substation Bay

VolkerInfra – Burbo Bank Extension / Bodelwyddan Unlicensed Substation Bay

Project OverviewThe BBW02 export cable system consists of a 220kV Export Cable system connecting the Offshore Substation with the Onshore Substation. The route length of the onshore Export Cable is approximately 11km, whereas the offshore Export Cable is 25km. The 220kV Export Cable system ends at the DONG Energy Onshore Substation. A 400kV cable connection is established from the DONG Energy Onshore Substation to the 400kV Bodelwyddan substation of National Grid located approximately 500m away....

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