FIELD: alternation of polarities in track circuits.
SUBSTANCE: technical solution includes rail lines of adjacent rail circuits with insulating joints, matching transformers with protective resistors, light-emitting and light-receiving elements of optocouplers, equipment for the supply and relay ends of rail circuits with travel relays, AC and DC sources, a full-wave rectifier.
EFFECT: possibility of automating the monitoring the alternation of polarities in track circuits with increased reliability.
3 cl, 2 dwg
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