AC-DC Controlled rectifier

Made in France

SCLE SFE's power electronics skills for SNCF maintenance centres

The controlled rectifier allows to generate different continuous current voltage levels from the catenary alternative current.

Doing so, it enables maintenance centres to simulate different continuous current phases and then test trains and trams in all the possible voltage configurations.

The AC / DC controlled rectifier can transform a 25,000 V single phase alternating current into a 1,500 V or 750 V regulated DC voltage. It can be integrated into a Shelter or an existing building.

Concrete shelter substation in Nevers



The service can include: the converter studies, the factory integration, trial conditions on the SCLE SFE power test platform, tests, FAT, delivery, installation, assistance on commissioning, training.

9-month implementation deadline


  • Ensures the proper functioning of trains and trams in all the possible voltage configurations
  • Optimises existing electrical installations
  • A very reliable equipment: 0 failure since 2003
  • Real FAT power tests at SCLE SFE's


  • A single-phase transformer
  • A mixed single-phase rectifier frame equipped with thyristors, diodes, RC modules, fuses, control cards,
  • Current measurement
  • A frame equipped with self and crowbar
  • A frame equipped with condensators, bleeder, free-wheeling diode,voltage measurement
  • A control rack equipped with control and power supply cards


  • Nantes, Nevers, Rennes: 25 kVac / 1500 Vdc controlled rectifier, 1.2 MW power
  • Noisy: 25 kVac / 750 Vdc controlled rectifier, 750 kW power