Desbloqueo de Frenos
El desbloqueo de frenos es una válvula con la que cuentan la mayoría de los vehículos ferroviarios motorizados, que aisla la válvula de control del freno del tren del resto del tren. Esta válvula suele ubicarse debajo del dispositivo de control del freno del tren, en la cabina del vehículo.
The brake cutout valves are there to ensure that, in a train with many motorized vehicles, only one train brake control device is enabled. If there were multiple, conflicts would occur, potentially resulting in dysfunctional brakes and a disaster.
When the train brake is cut out on a vehicle, its control device is no longer functional. However, the vehicle is still able to brake, as controlled by another vehicle's train brake.
The cutout valve only affects the train brake control device, but other brake types, such as independent, can still be used freely.