. The Street railway journal . STANDARD SUB-STATION SWITCHBOARD FOROPERATION OF THE MOTOR-GENERATORS ANDBATTERIES FOR THE CONTROL CIRCUITS THE SUB-STATION SWITCHBOARD FOR THE ALTERNATING-CURRENT BLOCK-SIGNAL MOTOR-GENERATOR AND CIRCUITS minals of the switch. In each sub-station but one set of high-potential alternating-current bus-bars is installed, and betweeneach incoming cable and these bus-bars is connected an oilswitch. In like manner, between each converter unit and thebus-bars an oil switch is connected into the high-potential cir-cuit. The bus-bars are so arranged that they may be divi
. The Street railway journal . STANDARD SUB-STATION SWITCHBOARD FOROPERATION OF THE MOTOR-GENERATORS ANDBATTERIES FOR THE CONTROL CIRCUITS THE SUB-STATION SWITCHBOARD FOR THE ALTERNATING-CURRENT BLOCK-SIGNAL MOTOR-GENERATOR AND CIRCUITS minals of the switch. In each sub-station but one set of high-potential alternating-current bus-bars is installed, and betweeneach incoming cable and these bus-bars is connected an oilswitch. In like manner, between each converter unit and thebus-bars an oil switch is connected into the high-potential cir-cuit. The bus-bars are so arranged that they may be dividedinto any number of sections not exceeding the number of con-verter units, by means of movable links which, in their normalcondition, constitute a part of the bus-bars. Each of the oil switches between incoming circuits and bus- Street railway journal [Vol. XXIV. No. THE OPERATING SWITCHBOARD IN GALLERY-SUB STATION NO. 11—SHOWING UNOBSTRUCTED VIEW ACROSS CONVERTER FLOOR BELOW bars is arranged for automatic operation, and is equipped with a reversed current relay, which, in the case of a short-circuit in its alternating-current feeder cable opens the switch and so disconnects the cable from the sub-station without interference with the operation of the other cables or the converting machinery. DIRECT-CURRENT DISTRIBUTIONFROM SUB-STATIONS The organization of electrical con-ductors provided to convey directcurrent from the sub-stations to themoving trains can be described mostconveniently by beginning with thecontact, or so-called third rail. Southof Ninety-Sixth Street the averagedistance between sub-stations ap-proximates 12,000 ft., and north ofNinety-Sixth Street the average dis-tance is about 15,000 ft. Each track,of course, is provided with a contactrail. There are four tracks, and con-sequently four contact rails, fromCity Hall to Ninety-Six
Size: 1970px × 1269px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
