. The Street railway journal . mpressors which operate the pneumatically-operatedswitches; the 30-in. gate valves in the exhaust branches fromthe main engines to the main exhaust pipes, the coal and ashconveyors, the freight elevators and the traveling crane. It will be noted that steam-driven auxiliaries predominate inthis station, and while, consistently, some might be equally wellhandled electrically, the feed-water requirements, prior to pass-ing into the economizers, are such as to readily absorb all ofthe heat yielded by the auxiliary exhausts, thus preserving theefficiency of the total
. The Street railway journal . mpressors which operate the pneumatically-operatedswitches; the 30-in. gate valves in the exhaust branches fromthe main engines to the main exhaust pipes, the coal and ashconveyors, the freight elevators and the traveling crane. It will be noted that steam-driven auxiliaries predominate inthis station, and while, consistently, some might be equally wellhandled electrically, the feed-water requirements, prior to pass-ing into the economizers, are such as to readily absorb all ofthe heat yielded by the auxiliary exhausts, thus preserving theefficiency of the total heat cycle. PIPING In this plant special care has been given to the design andconstruction of the piping system, and which could be at bestbut poorly described. It needs to be seen and judged compara-tively with the piping of other large plants to establish its 12 STREET RAILWAY JOURNAL. [Vol. XXIV. No. I. merits. The high-pressure piping is of the welded flange type,all valves and fittings being extra heavy. The large exhaust. FRONT OF BOARDS MOUNTING INSTRUMENTS FOR ELECTRIC CONTROL AND MEASUREMENT cold, with initial tension for the relief of strain under heat ex-pansion and various other improved means of securing the bestresults, are carried out with great full-ness, yet along rimple lines in this work. ELECTRICAL SWITCHING EQUIPMENTOne of the most important develop-ments in the design of electrical installa-tions of large power stations operatingat high voltage has been in the methodsof isolating the electrical circuits. Inthe design of the switching equipmentfor this station the same care was exer-cised in the provision of masonry con-struction and soapstone barriers as wasfollowed at Ninety-Sixth Street powerstation, but the isolation is more com-plete, without sacrificing anything inaccessibility. Each main busbar iscompletely enclosed in a separate mas-onry compartment, and each pole ofeach individual circuit breaker is sep-arated from its neighbor by a marblebarrier.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
