Ef­fi­cient main­ten­ance for urban areas

Plasser CompactFlex 2x4 for the metro in South Korea

The Plasser CompactFlex 2x4 supports Humetro in efficiently maintaining the 167 km long metro network in Busan. As the first machine in the new Compact series in South Korea, it replaces a tamping machine that has been in use since 1998. Maintenance work must be carried out in a narrow time window between 1 and 5 a.m., which means that high reliability and performance are crucial.

The CompactFlex 2x4 is part of a modular series of compact tamping machines characterized by high safety and ergonomic standards. With individual configuration options and low axle loads, it is suitable for different lines, even those with tight radii and low clearance gauges. The machine was made transportable especially for Humetro so that it could reach a section of track not connected to the rail network by lorry once a year.

Innovative technology for precise tamping

Thanks to an additional control and operating element, one person can carry out all maintenance tasks from the work cab, supported by cameras and lasers. TampingControl Force Automation adjusts the squeezing force in real time, increases process reliability, and enables precise documentation.

Special systems for use in South Korea

  • Cameras for close-range safety: High-resolution night vision cameras at the front, rear, and sides monitor the danger zone The CCTV system provided by the customer continuously records all images.
  • Re-railing device: Hydraulic lifting jacks allow the machine to be moved sideways to quickly clear the track if necessary.
  • Electrification: A battery pack powers electrical consumers and air conditioning systems. It can be charged via the engine or an external power source in the depot.

Service and support from local partners

Together with Plasser Far East, Plasser & Theurer provides support for the demanding approval process and offers Humetro commissioning, training, and maintenance 24/7.

Climate-friendly with E³ for the Paris metro

As of 2026, the construction company TSO will be using two battery-powered E³ tamping machines to maintain the Paris metro. The two Plasser MetroFlex E³ machines are characterized by an innovative drive concept with batteries as the energy source. The innovative drive concept enables low-emission work in narrow time windows. The machines load during the day between jobs. Power can be fed directly from the third rail via the power converter to the battery pack.

E³ reduces noise and emissions in tunnels and densely built-up areas, improves working conditions, and minimizes health risks. With its compact design, the Plasser MetroFlex E³ is a perfect fit for urban environments.

Condition monitoring at Wiener Linien

Vienna’s metro network is growing: the expansion of the U2 line and the construction of the new U5 are increasing capacity. The new Plasser InfraSpector 10.5 provides data on track geometry, wear, surface quality of the rails, and the track environment during operation. The non-contact measuring data is analysed in real time; further analyses are carried out in the tmOS application hub. The track inspection vehicle has its own energy supply from battery packs to independently power the measuring systems. Charging takes place using the conductor rail or the U6’s overhead contact line.

Lightweight construction and sustainability

The aluminium cab reduces the axle load to 9 t. The measuring trolley has its own power supply via battery packs to independently power the measuring systems. Charging takes place using the conductor rail or the U6’s overhead contact line.