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Alfa Trafili also manifactures droppers , a key element in the overhead contact lines. These are thin vertical wires that connect the feeder/contact wire to trolley, playing an essential role in maintaining the system proper alignment.

Their presence ensures the line’s geometry is maintained, guaranteeing a constant distance between the two conductors and thus contributing to stable and optimal current collection by the pantograph. The correct balance among contact wire, dropper and trolley, is what allows modern railway systems to operate with high reliability even under high-speed operating conditions.

The products comply with RFI categories, in accordance with national railway network standards, for which the company has been certified for over 30 years, guaranteeing quality, reliability, and ongoing production