. The Street railway journal . to the drop in the transmission lines or according to the dis-tribution of load among the sub-stations. The transformersare of the air-cooled type, with terminals underneath. Theair is supplied by two induction motor-driven blowers, one ofwhich is sufficient to supply the station. The rotaries are ofthe sextuple connection, three-phase type, which combines theadvantages of the ordinary three-phase and six-phase type. The direct-current switches and circuit breakers are motor-operated. The switches and breakers are positive, rapid and EXTERIOR OF SUB-STATION NO. 3
. The Street railway journal . to the drop in the transmission lines or according to the dis-tribution of load among the sub-stations. The transformersare of the air-cooled type, with terminals underneath. Theair is supplied by two induction motor-driven blowers, one ofwhich is sufficient to supply the station. The rotaries are ofthe sextuple connection, three-phase type, which combines theadvantages of the ordinary three-phase and six-phase type. The direct-current switches and circuit breakers are motor-operated. The switches and breakers are positive, rapid and EXTERIOR OF SUB-STATION NO. 3, SHOWING ALSO THE TYPES OF POLEAND OVERHEAD CONSTRUCTION tions and connect to an ammeter shunt which carries theentire station output. The negative feeders are bare 2,000, cables, which run out directly to the tracks inpipes. There are two controlling boards situated at the center ofeach sub-station where it is extended to its final limits. Abench board carries the principal instruments and control ap-paratus, a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
