. Electric railway journal . CAM-OPERATED CONTACTOR UNIT. MOTOR CONTROLLER IN WHICH CONTACTOR UNITS ARE OPERATED BY CAM SHAFT ACTUATED BY AIR ENGINE. REVERSER SHOWN ATRIGHT IS ALSO AIR OPERATED. ILLUSTRATIONS HAVE BEEN INVERTED TO SHOW APPARATUS MORE CLEARLY 828 ELECTRIC RAILWAY JOURNAL [Vol. 50, No. 18 be advanced from point to point only by successivemovements of the lever. Excessive jumps in the ac-celerating current are thereby This ar-rangement gives the advantages of automatic and non-automatic control combined. A feature of the PC control system is that the motorconnections
. Electric railway journal . CAM-OPERATED CONTACTOR UNIT. MOTOR CONTROLLER IN WHICH CONTACTOR UNITS ARE OPERATED BY CAM SHAFT ACTUATED BY AIR ENGINE. REVERSER SHOWN ATRIGHT IS ALSO AIR OPERATED. ILLUSTRATIONS HAVE BEEN INVERTED TO SHOW APPARATUS MORE CLEARLY 828 ELECTRIC RAILWAY JOURNAL [Vol. 50, No. 18 be advanced from point to point only by successivemovements of the lever. Excessive jumps in the ac-celerating current are thereby This ar-rangement gives the advantages of automatic and non-automatic control combined. A feature of the PC control system is that the motorconnections are made in the correct sequence by me-chanical means. As the contactors must close in theorder determined by the setting of the cams on theshaft, the possibility of improper operation that some-times occurs with individually operated contactors isentirely eliminated. This method of operating the con-tactors has also the advantage of cutting out all inter-locks on the contactors, which greatly simplifies thecontrol. Thus the benefits of automatic accel
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
