HeatHrow west Intake substatIon BACKGROUND The West Intake substation at Heathrow is one of a series of 33kV intakes that were originally constructed in the 1960s; an upper level was built the late 1990’s. The 33/11kV transformers and 33kV feeder cables, owned and maintained by Heathrow Airport, had reached the end of their operational life and required replacement. UK Power Networks Services was contracted to design, procure and install

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