400kV urban substation, London Customer: Major UK grid operator Location: London Application: Power transformers Highest voltage: 400kV Bringing Together Safety and Reliability A major UK grid operator needed an innovative solution to the challenge of installing 400kV transformers in a densely-populated area of London. The aim was to combine safety and reliability with a heat exchanging device (directing the captured transformer heat-loss to a nearby school). A world leader in transformer manufacturing provided the operating assets – 400kV transformers – and selected MIDEL 7131 as the best choice of dielectric fluid. Safety, reliability and environmental impact are crucial considerations for grid operators and transformer manufacturers, especially for installations in large cities. Reside

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