First locomotive with Hybrid-DACs of two manufacturers successfully tested in the Train Test Lab

Within FP5-TRANS4M-R’s Train Test Lab, Hybrid-DACs from different manufacturers were integrated and tested on one locomotive, examining interoperability between digital and conventional coupling modes.

Another test programme has successfully been carried out at the Train Test Lab (TTL) in Berlin-Spandau. This time, the tests focused on the use of hybrid couplers in locomotives, specifically their functional performance.

For this purpose, Hybrid-DACs from both Dellner and Voith were integrated into a single DB Cargo locomotive (Alstom Traxx 2, series 185). The necessary modifications on the Locomotive have been defined and realised by Alstom Kassel and Stendal. The mounting of the hybrid couplers and execution of the tests were realised by the Train Test Lab team, led by Work Package 14 Lead Daniel Wolfram from DB Cargo.

“We are pleased that the tests carried out at the Train Test Lab continuously contribute to the development of the Digital Automatic Coupling. Testing couplings from two manufacturers on a single locomotive is another important step forward.”
Daniel Wolfram, WP14 Lead Train Test Lab

Hybrid DACs are capable of coupling with both conventional screw couplers and the innovative Digital Automatic Couplers DACs, thus ensuring interoperability in the transition phase between the coupler systems.

Figure 1 Hybrid Couplers from Dellner (left) and Voith (right) coupled to freight wagons equipped with DACs (Credits: DB Cargo AG/Daniel Wolfram)

Test scope
The test programme included the following elements:

• Coupling and uncoupling in DAC mode and screw coupling mode
• Switching between coupling systems
• Operation at different speeds on straight and curved track sections
• Assessment of prevent‑coupling position
• Evaluation of operational safety and handling aspects (e. g. Bern rectangle)

Operational staff, including drivers, were involved in the tests to provide practical feedback.

Use of results and outlook
The results of the tests are being used within FP5-TRANS4M‑R to support further development of DAC systems. In particular, they provide input for manufacturers regarding functionality and system integration.

Have a look at Dellner’s LinkedIn to see a video of their Hybrid DAC switching between coupling modes.

Credits title image: DB Cargo AG/Jan Zimmermann