. The street railway review . der switches. 1 group switch, and 1 exciterswitch. The present arrangement is slightly diflferenl. Directlyunder the switches are the concrete bus bar compartmeiils, one foreach phase, and the vertical barriers for disconnecting switchesand cable connections corresponding to the oil switch phase com-partments above. Here also are potential and current transformers. The main current passes from generator to giiirator switch, thento bus and from bus at different points to line switches, then fromline switches to onlgoiiig ducts through static dischargers, each phase
. The street railway review . der switches. 1 group switch, and 1 exciterswitch. The present arrangement is slightly diflferenl. Directlyunder the switches are the concrete bus bar compartmeiils, one foreach phase, and the vertical barriers for disconnecting switchesand cable connections corresponding to the oil switch phase com-partments above. Here also are potential and current transformers. The main current passes from generator to giiirator switch, thento bus and from bus at different points to line switches, then fromline switches to onlgoiiig ducts through static dischargers, each phasebeing separate an<l brought together only at the end bell with which M-h feeder terminates in the bus bars have one sectionalizing swiuli separating theminto east and west buses. All are in lead-covered cablesand are laid in the ducts one above the other along the wall backof bus bars. .\ junction room or chamber is placed at a point inthe line where It became necessary to change from a vertical single. no. IS—CUAl. IMICK 1; I .-^ width conduit to the square type of conduit which was used fromthe station to the first street manhole and from there to the varioussub-stations. In this connection reference may be m,ide to the plan showingthe conduit construction and to plans of two of the importantsub-stations, that at 15th and Walnut and at 12th and Cleveland,which arc shown herewith, Figs. 12 and 13. The inatter of electrical connections, apparatus and operation is .1 large enough for another article and would be moreappropriate when this jmrt of the construction, equipment and appa-ratus is further advanced and has assumed its permanent form. Boilers. ThelMiilcr plant,-ee I-igs, 14 and 15. consists at present of eighteen578-h p. Itahcock & Wilcox double deck superheating l)oilers withGreen chain grates 11 ft. 6 in wide. The boilers arc arranged t i . i mm /^ nnrj 1 nz.^ :^!^ vir^r. J^if** ^h h^iri FIG. 19-lllGH PRESSl-RE CYLINDER AND CONN
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
