File:The street railway review (1891) (14738317466).jpg

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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i.\ which are mounleil an e.xciler. Controllers are mounled at boiliends of the car. The control is of the multiple unit type, .so thaiany number of similarly eipiipped cars can be coupled together andoperated from any controller. The current is collected by means oftwo short bows and before reaching the motors passes llirough an au^loinatic circuit breaker and a fuse. A smaller transformer carried onthe cars furnishes low voltage current for the compressed air pump,llie lighting and the control circuit. There is no resislaniV used in L4« STKKHT RAILWAY KHVIKW. I Vol. XIV. No. 4. ^la^lillK Ihc iiiulors arc «.( ilic W iiilrr-Kiclil>crK lypf. the ki!arranKi-inciK of wliicli were ik-scrilicd and iliagrainiiialically illu«-iratcil ill the Review for Marcli, 11/J4, page U)j Tlicsc motorsarc wouikI for a pressure of h.oco volts and 25 periods and tliey arcpermanently connected in parallel. At full speed their efficiencydocs not attain that of the continuous current motor, hut this dc-
Text Appearing After Image:
CAR KyrriiKi) Mini .Mo.vnpii.vsi-; motors feet is compensated for in ihe nuicli sni.Tller starting current wlrclithey require. The current of 6.000 volts is only used in a portion of Ihe e.xcilcrand in Ihe stationary part of the motor. In the other part of thewindings the difTcrencc of potential is igo volts at the maxiinuni.For the lighting circuit the tension is reduced to 33 volts and thelamps are connected in multiple so that any nunihcr may he used Owing to this arrangement the danger which would he incurredin case of the trolley wire breaking is very greatly diminished, asin case of a hreak the hanging portion of the broken wire wouldalw.ays be at least 2.5 meters above the rail, and consequently out ofreach of pedestrians. The use of a current of 40 periods avoids thedilDcuhics which arise with a smaller nunilK-r of periods in the caseof lighting. In certain countries, however, such asHelgium for example, the use of higher frequencies:ire prohibited by law Some of the experimen

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