File:The street railway review (1891) (14755491921).jpg

Identifier: streetrailwayrev12amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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e speed of the engines may he or lowered four or five revolutions per minute in order to synchronize the £• 1 also to divide the load between the engines. The engine bearings have automatic forced lubrication. The genera nghouse construction. The rotating fu\\- are built on a cast iron spider. The exterior frameof the engine is movable in a line parallel to the shaft to allowready access to the windings. There are 32 poles and the fields ro-a speed of 94 r. p. m. giving approximately 25 cycles persecond. Each machine 1 ly excited. The rated capacity of the generator is a load of 89 amperes per terminal at 13,000 voltsand too per cent power factor. The inherent regulation shall notvary more than 6 per cent when the load is thrown off, thisefficiency being based on copper and iron losses, and at maximumload tli :rc shall not rise more than 35 degrees over that of the surrounding atmosphere after 24 hours run. The field coilsare wound with strap copper on edge. The armatures are wound
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™ Power HitUMv • Section Insulators. transforming apparatus will be Wcstinghouse make of standarddesign. NEW ADDITION FOR ALTERNATING MACHINERY. The annex to the Pratt Street power house, which is to containthe alternating apparatus, is 90 ft. by 131 ft, there being space forsix 2,000-kw. units. The engines and alternators for four of theseunits have been contracted for and will be delivered during the pres-ent year. Each unit comprises a 3.000-h. p. vertical cross compoundengine, direct connected to a 2,000-kw. Wcstinghouse alternatorof the fly-wheel engine type with rotary fields. The engines willbe supplied by the Mcintosh & Seymour Co., of New York. These engines have cylinders 33x68 in., with 56-in. stroke, andtake steam at a pressure of 165 lb. The i. h. p. is 2.970 at 26-100cut off. and 4,220 at V2 cut off. The shafts arc to be fluid com-pressed hollow forged open hearth steel forgings, as made by theBethlehem Steel Co. They are to be 28 in. in diameter. The engine gove

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