ABB UPS success story As well as essential electrical components for the Gotthard Base Tunnel infrastructure, ABB also supplied the uninterruptible power supply (UPS) for the maintenance and intervention centers in Biasca and Erstfeld. Launched in 1993, the Gotthard Base Tunnel – the longest rail tunnel in the world – finally opened in June 2016, a year ahead of schedule. ABB’s contribution to this monumental construction project came in many forms – such as the over 800 medium-voltage (MV) switchgear units and transformers that power the tunnel infrastructure and 50 Hz grid; the more than five hundred REF542plus safety and control units, with multi-stage distance protection, to ensure optimal security across the entire tunnel; the several hundred ABB vacuum- impregnated dry-t

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