The first derailment tests of Digital Automatic Couplers (DAC) under the FP5-DACtiVate project are being conducted in Görlitz, Germany.
The test series involves pushing two DAC-connected wagons into stationary, loaded and braked wagons situated on a curved track. This configuration simulates a derailment-prone scenario caused by climbing forces. During the tests, couplers must withstand a horizontal pushing force of 550 kN—applied ten times—without leading to a derailment. Data collection includes real-time measurement of forces and monitoring equipment installed on the wagons.
Couplers from four manufacturers—Dellner, Knorr-Bremse, Voith, and Wabtec—are tested in different combinations. The tests aim to confirm not only the safety of each design but also interoperability between products from different suppliers. All coupler systems are mounted on wagons provided by keepers coordinated under the Union Internationale des Wagon Keepers (UIP).
The test site, operated by TÜV Süd in Görlitz, provides the necessary infrastructure and certified conditions for derailment scenarios, including dedicated curve radii and technical setups for instrumentation.
The testing phase is scheduled to last four weeks. Results will be compiled and evaluated, with detailed reports expected for release toward the end of 2025. These reports will form part of the technical documentation required for potential authorisation of DAC deployment in European freight operations.
