. Electric railway journal . fmeryency Alarm Circuif in Telephoiie Cables Bus+Bus ENCY AEARiVl PANELS IN SUBSTATIONS 580 Electric Railway Journal Vol. 54, No. 12. EMERGENCY ALARM PULL BOX rent is automatically shut off from the third rail andother emergency precautions are provided for auto-matically. The shutting-off of power in the sectionwhere the alarm is turned in immediately stops all trainmovements in this section and eliminates any dangerfrom moving trains and live rails, thus making it per-fectly safe for the passengers to enter upon the tracksand proceed to the nearest exit
. Electric railway journal . fmeryency Alarm Circuif in Telephoiie Cables Bus+Bus ENCY AEARiVl PANELS IN SUBSTATIONS 580 Electric Railway Journal Vol. 54, No. 12. EMERGENCY ALARM PULL BOX rent is automatically shut off from the third rail andother emergency precautions are provided for auto-matically. The shutting-off of power in the sectionwhere the alarm is turned in immediately stops all trainmovements in this section and eliminates any dangerfrom moving trains and live rails, thus making it per-fectly safe for the passengers to enter upon the tracksand proceed to the nearest exit or end of a passengerstation. Turning In An Emergency Alarm By releasing the handle in the emergency alarm pullbox a mechanism rotates a slotted disk. At the firstbreak or slot in this disk the controlling current is in-terrupted, which opens the circuit breakers feeding thissection and all equalizer circuit breakers. All of theemergency boxes in a particular section are connectedon a closed circuit so that any one box can be operatedto break the circuit for that section. An accompanyingillustration shows the type of emergency alarm panelwhich is installed in the v
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
