File:The Street railway journal (1906) (14760771385).jpg

Identifier: streetrailwayjo271906newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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edis 100 r. p. m. They are built by the Alberger CondenserCompany. Fig. 7 is a view of the centrifugal circulatingpump and its engine, and also of the dry air pump, which,like the condenser, is placed in an arched opening in the en-gine foundation. CONDENSER TUBE PROTECTION A somewhat unusual feature has been introduced into thisstation to prevent the serious deterioration usually occurringwhere salt water is used for circulation of surface condensers.It is the universal experience that more or less galvanic ac-tion takes place in any event at the expense of condensertubes, but this is often aggravated in large and important tween the river, the flume, and various parts of the pipingabout the building and in the streets, to indicate that therewas at all times a difference of potential enough to maketrouble, although its polarity was not always tlic same. * I----, ^ -. ill ^ijLiG^S^^iSi (tjk .., (^ ^ti^B^^ 1 Pj^l\^\4^^J t--r^«,a IP^^disiA i^S^pB kr^ ,■, 4,-m&\i:M m Bt^^ ._;. / i
Text Appearing After Image:
FIG. 10.—GENERATOR END OF 5500-KW TURBO-GENERATUR plants by the fact that the water and the body of the conden-ser have formed a convenient path for stray electric railwayreturn currents getting back to their own power station somedistance away, through the condenser intake and the waterof the harbor. A sufficient number of voltmeter readings were taken be- FIG. 11.—STEAM END UF uGOO-KW TURDU-GENERATUR The metallic connections of the power station equipmentto the city piping station are through two 14-in. connectionsto the water mains and on account of the proximity of watermains to the trolley tracks all over thecity, there is a tendency for stray cur-rents to flow into tlie piping of thebuilding, and then to the condenserintake, returning through the river tothe negative bus-bars of some neigh-boring street railway power plant. Cur-rents flowing in this direction are cer-tain to cause electrolytic corrosion inthe condenser tubes. The method adopted to preventthis corrosion consi

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