New 318 tonne transfomer delivered substation in Kent

New 318 transfomer being delivered this weekend to Sellindge substation to help keep lights on in Kent and beyond

19 May 2017

  • 318 tonne electricity transformer travelling from Dover to Sellindge on 87 metre plus vehicle overnight on Sunday 28 May


  • Delivery will travel at a maximum speed of 12 mph


  • Transformer will help ensure people remain connected to safe and reliable electricity supplies

A house-sized electricity transformer will be heading from the Port of Dover to National Grid’s Sellindge substation with a police escort.

At midnight on Sunday 28 May the transformer will leave the Port of Dover aboard a specialist delivery vehicle which is over 87 metres long. The transformer is expected to arrive at the Sellindge electricity substation at 7am on Monday 29 May.

Flanked by outriders from Kent Police the transformer will exit the Port of Dover at Union Street and will travel along the A20 to the Alkham Valley Road Junction (A260 – Canterbury Road). It will then continue along the A259 (Churchill Avenue) to access the M20 at junction 13.

It will exit the M20 at junction 9 and re-join it to travel back to junction 10. This is due to a weight restriction at this junction. The load will then leave the M20 at junction 10, travelling along the A20 and Church Lane before reaching Sellindge substation.

The A20 will be closed temporarily from Dover to the A260 exit. The road will be closed from 10pm on Sunday 28 May until 4am on Monday 29 May. A signed diversion route will be put in place.

Throughout its journey the vehicle will travel at approximately 12 miles an hour.  It’s so big that it needs two trucks, one at the back and one at the front, to propel it.

National Grid project engineer Alex Lloyd, said: “It’s our job to connect people to the energy they use and this delivery is part of that process.

“Once operational the transformer will change the voltage of electricity so it can be transported along local power lines and delivered to homes, businesses and community facilities.”

He added: “We’ll do all we can to make sure this delivery goes as smoothly as possible. If people could please avoid parking on the route – particularly on narrow areas – it will ensure we get the transformer from the Port of Dover to Sellindge substation as quickly and efficiently as possible.”

If people have any questions or concerns about the delivery they can call 0800 731 1231 or email

Contact for media information only

Press officer - Infrastructure Projects
Jeanette Unsworth
+44 (0)7785 290230

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Notes for editors

Notes to Editors:

National Grid is one of the largest investor-owned energy companies in the world and was named Responsible Business of the Year 2014 by Business in the Community. This accolade acknowledges all of our efforts in getting involve with the things that really matter to us and to society. We own and manage the grids that connect people to the energy they need, from whatever the source.  In Britain and the north-eastern states of the US we run systems that deliver gas and electricity to millions of people, businesses and communities.

In Britain, we run the gas and electricity systems that our society is built on, delivering gas and electricity across the country.  In the North Eastern US, we connect more than seven million gas and electric customers to vital energy sources, essential for our modern lifestyles.

National Grid in the UK:

  • We own the high-voltage electricity transmission network in England and Wales, operating it across Great Britain
  • We own and operate the high pressure gas transmission system in Britain
  • We also own a number of related businesses including LNG importation, land remediation and metering
  • Our portfolio of other businesses is mainly concerned with infrastructure provision and related services where we can exploit our core skills and assets to create value. These businesses operate in areas such as Metering, Grain LNG Import, Interconnectors and Property. National Grid Carbon Ltd is a wholly owned subsidiary of National Grid. It undertakes Carbon Capture Storage related activities on behalf of National Grid.

Find out more about the energy challenge and how National Grid is helping find solutions to some of the challenges we face at

National Grid undertakes no obligation to update any of the information contained in this release, which speaks only as at the date of this release, unless required by law or regulation.

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