A LOCAL firm has supplied bespoke transformers as part of a National Grid project to build cable tunnels underneath the streets of London.

The deal, worth £400,000, has seen Pudsey based company Winder Power being commissioned to design, build and install two transformers to supply power to tunnel boring machines at New Cross as part of the London Power Tunnels project.

The two specially-built transformers that were installed comprised a 5000kVA, 13000/11000V transformer along with a 13000V earthing transformer.

They were used as part of the second phase of an ambitious project to "rewire London". The LPT2 scheme is a £750 million investment to future proof the capital’s electricity supplies.

Winder Power managing director Paul Matthews concluded; “As a business we were delighted to be given the opportunity to support National Grid with their LPT2 project, and the entire team worked tirelessly to ensure that at every stage of the process we adhered to our principles of manufacturing excellence, with safety at the forefront of everything we do.

"There are very few companies who have the in-house capability to design, build, test and install such a complex transformer requirement, which is a credit to everyone involved.”

In summer 2019, National Grid began work on the construction phase of the LPT2 project, building 30km of cable tunnels stretching from Wimbledon in south west London to Crayford in south east London.

The tunnels, which will be up to four metres in diameter, will largely be buried deep beneath the streets, in order to minimise disruption to those living and working in the area.

Winder Power’s part in this extensive project involved the design, build, testing and installation of the two bespoke transformers, designed to limit the fault current in the neutral to 830A for three seconds.

Once the transformers had been designed and built at Winder Power’s Pudsey factory and headquarters, they were then subjected to a stringent testing and approval process.

The installation project took place over two weeks, with a number of challenges including including restricted access and a complex set of road closures.

Of the installation, senior site manager Carl Truscott from Murphy Power Networks, said; “I would like to take this opportunity to congratulate the installation team on their safe, professional & finely tuned work ethic. My thanks go to the entire team who worked on the project.”

Tony Zakaria, project engineer for National Grid added; “The guys on site were exceptional and worked really hard to get both transformers in. Both Peter Wood and Mick Clifford were open and easy to work with – we sat down with the National Grid commissioning engineer and they fully understood, and appreciated, our processes. Well done to the team!"

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