Airfield Lighting control system Resilience upgrade Case Study | Dublin Airport, Ireland During the project there was to be a re-organisation of the CCR’s in the East and West Substations ensuring that interleaved airfield services were not in the same location. In addition to moving around existing constant current regulators, new CCR’s would be connected to each of the PLC cubicles to improve the control resilience of the circuits. Rationalisation of the Bravo Taxiway segments was also implemented as part of the scope of works. The existing fibre optic network had been installed in a “star” topology, which was required to have a central hub. As part of the West and East Sub resilience project, the fibre optic network was converted into a “virtual Ring” topology.

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