ScotRail Trains Limited (herein referenced as ScotRail) wish to overhaul the existing Knorr Bremse WP98 WSP control units on their fleet of 117 trailer cars and spares stock. The WSP control units (Railway Cat number 064/012539) were installed in the mid-2000s, and are starting to suffer from failures related to leaking electrolytic capacitors, leading to damage to the PCB tracks and vias. The full scope of the requirements is…

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