Hello, and thank you for your comments. As far as I know, there are in France some areas where using "récupération" (i.e. producing and sending it back to the over-head line) is forbidden due to incompatibility with track-circuit. So, either they use the rehostatic braking (dissipating energy through resistors) or use engines without this feature!
The idea is, on the long term, to modify track-circuit in order to protect them from these effects.
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