. The Street railway journal . tingby direct current derived from these starting sets, rather thanby direct current taken from the main bus-bars of the sub-station, was determined upon to avoid undue magnetic andelectrical strains in the converter, such as may easily resultfrom a slight mistake of the operator, for example, in closing p January 3, 1903.] STREET RAILWAY JOURNAL. II the synchronizing switches when the machines are not exactlyin step. SWITCHBOARD EQUIPMENT A single set of bus-bars is placed in isolated brick compart-ments, with incoming feeder switches to one side of the bus-bars
. The Street railway journal . tingby direct current derived from these starting sets, rather thanby direct current taken from the main bus-bars of the sub-station, was determined upon to avoid undue magnetic andelectrical strains in the converter, such as may easily resultfrom a slight mistake of the operator, for example, in closing p January 3, 1903.] STREET RAILWAY JOURNAL. II the synchronizing switches when the machines are not exactlyin step. SWITCHBOARD EQUIPMENT A single set of bus-bars is placed in isolated brick compart-ments, with incoming feeder switches to one side of the bus-bars, and outgoing rotary converter switches to the other side. of the usual type, with its end panels placed at right angles tothe panels forming the central portion of the board, thus in-closing on three sides the operating bench board. The alternat-ing panel board and the operating bench board are illustratedin Fig. 15. Each incoming feeder and each rotary converterhas a controlling switch, with visual signals arranged diagram-. FIG. 13.—PLAN OF SUB-STATION NO. 4, LOOKING DOWN ON TRANSFORMER GALLKKY AND MAIN FLOOR The bus-bars are dividedby knife switches intosections, one for eachrotary converter, sothat any section of thebus-bars may be shutdown for repairs. Each of the threeconductor cables carry-ing high-potential current from the power house to the sub-stations is equipped at the power house end with an oil circuit-breaking switch, with a time limit relay device, and in case of ashort circuit in the cable the supply of current from the powerhouse would be interrupted at the end of a predetermined inter-val. At the sub-station end the cable is connected to the bus-bars through a similar oil circuit-breaking switch, but in this in-stance the switch will open automatically in case of a reversal ofthe current, such as would be caused by a short circuit in thecable. Again, in each high-potential alternating-current circuitwhich connects the bus-bars at sub-stations with a grou
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
