Article deals exclusively with relays used in signal work operated by direct current; theory of electromagnet as applied to operation of d-c relays; neutral, polarized, slow drip-away, slow pick-up, flasher, interlocking, two-rate change control, power transfer, plug-in, and centralized traffic control type neutral relays discussed; relay coil combinations.


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    Title :

    American railway signaling principles and practices: chapter VI; direct current relays


    Additional title:

    American Railway Signaling Principles Practices



    Publication date :

    1942


    Size :

    33 pages


    Type of media :

    Book


    Type of material :

    Print


    Language :

    English