Identifier: streetrailwayrev14amer (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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m, the main switching room and the transformerriKim. The second story contains the second switching room andthe basement is used for a storage battery. The current from Kubcl-Hcrk is stepped down in the transformer room to J,CXX> volts byniear* of three transformer^ of 150 kw capacity each. Iwo of and generate i,ii amperes at Soo \oli>. Ilu- aniiatiirc is 745 unii.in diameter and ,yo mm. long and has 95 slots. The conductorsconsist of copper band. The commutator has a diameter of 400nuu. and is made up of 2S5 segments. There are four field coils•ach consisting of 4,.?50 turns and these coils are joined iu scries,ilic efficiency of the direct current machines is 91 per cent at fullload and 8 per cent at half load. The storage battery consists of 400 cells and has a capacity of iy8ampere-hours. The glass vessels containing the plates arc mountedupon stands made of inpregnated wood and these stands are insu-lated from the earlh 1)> c^ln^s insulators The battery is diviScd into
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PF.lOT .\T SPEK HER. S\MT/EKI..\ Ml. thcAC transformers supply the current reipnreil for ilu- tramway andthe third transformer is used for lighting purposes The threetransformers are arranged fo as to be used interchangeably. Eachof the two converter groups in the generating room consists of ahigh tension induction inolor coupled by means of an insulatedllexihie coupling to a direct current shunt dynamo. The three-phaic motors arc of the Ocrlikon type, No. .1067, and r>pcratc atJ.000 volts, 50 allrrnalinnii. They have a capacity of i.ss h. p. anilrun at a speed of 4Q0 r.p.m. The ilator core ha« a liorc </X) mm. in rliamcler and is 325 mmlong. It \i provided with 144 sIol«, each slot holding IS conductorsThe rotor is Rf^ mm. in diameter and has iHo slots, each slot carrying a conductor tiuill up of five bare cop;HT wires. In theseinoion the primary windings are upon the slator and the inducedcurrent i« carried by the rotor. The eflTicieiicy of the motors is 01l<cr cent with

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