. The Street railway journal . -phase alternating currentis i:>roduced and sent out at 11,000 volts, over heavy three-conductor cables, to the seven outside sub-stations, where thecurrent passes through step-down transformers and thence is 8. the first-story front is of massive pink granite. Above thisrise three stories of brown-tinted, fire-flashed brick, mottledby irregular metallic spots. The whole is relieved by mouldedbrick of the same quality of material, and used in ornamentalstring courses, and in the cornice. A sill course of pink graniteis placed imder the fourth-story windows, an
. The Street railway journal . -phase alternating currentis i:>roduced and sent out at 11,000 volts, over heavy three-conductor cables, to the seven outside sub-stations, where thecurrent passes through step-down transformers and thence is 8. the first-story front is of massive pink granite. Above thisrise three stories of brown-tinted, fire-flashed brick, mottledby irregular metallic spots. The whole is relieved by mouldedbrick of the same quality of material, and used in ornamentalstring courses, and in the cornice. A sill course of pink graniteis placed imder the fourth-story windows, and the parapet issurmounted by a granite water-table. The total height of thesebuildings is about 65 ft. above the sidewalk. In the interior arrangement of stations Nos. 2, 3, 5, 6 and 7the rotary converters are carried upon concrete foundations,built up to the level of the first floor. They are placed in twoparallel rows, with a passageway between them, the spaceoccu]iied Ijy the converters being 26 ft. x 77 FIG. L-TYPICAL INTERIOR VIEW OF MANHATTAN SUB-STATION—ROTARY ROOM OF NO. 8 taken to rotary converters at 390 volts. From these convertersdirect current, at 625 volts, is delivered to a single-conductorcable, through which it passes to the third rail. The maximuminstallation for each sub-station is six 1500-kw rotary con-verters, each with its group of three step-down transformers;a motor-generator set for starting the rotaries from the directcurrent end; two boosters, for controlling the output of twofloors of storage batteries, representing a 3000-kw-hourcapacity, and the complete equipment gives a total nominal out-put for the station of 16,000 hp. Fig. i is an interior view of atypical sub-station, in which four rotaries and their auxiliaryequipment have been installed. The ground plan of these buildings is rectangular, and ap-proximately 50 ft. X 100 ft., being as near this dimension as theirregularity of two downtown lots will permit. The building
Size: 1832px × 1363px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
