Electro-diesel multiple unit

SNCF Class B 81500, an example of an electro-diesel multiple unit

An electro-diesel multiple unit (EDMU) or bi-mode multiple unit (BMU) is a form of a multiple unit train that can be powered either by electric power picked up from the overhead lines or third rail (like an electric multiple unit – EMU) or by using an onboard diesel engine, driving an electric generator, which produces alternating current (AC) or direct current (DC) electric power (like a diesel-electric multiple unit – DEMU).[1][2]

  1. ^ "[UK] Greater Anglia: First FLIRT UK on the tracks for testing". Railcolornews. 15 May 2018.
  2. ^ "Bi-mode multiple unit – FLIRT" (PDF). Stadler. The bi-mode units enable an interruption-free service on electrified and non-electrified lines. The necessary power is generated by diesel engines[…]. When running under catenary the diesel engines can be shut off

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