File:The Street railway journal (1903) (14575108987).jpg

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Identifier: streetrailwayjo211903newy (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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three contactors each. This savesroom and also avoids the necessity of muchof the interconnection of the contactors byheavy wires. An improved form of contactor blow-outhas also been adopted. It is considered by themanufacturers more efficient than that used onthe Manhattan equipment, and by it a con-siderable reduction in weight has been securedwith a greater current carrying capacity. A diagram of the connections which will be used in the con-trol system adopted is shown on page 413. As will be seenby following out the control circuits on first notch, the coils ofcontactors 6, 7, 9 and 15 are energized in the order given. Thisallows the main current from the motors to flow first throughcontactor No. 7, then through contactor No. 6, resistances R-ito R-8, motor No. i and contactor No. 15; then through con-tactor No. 9 and resistances R-7 to R-12, and then throughmotor No. 2 to ground. On the second series notch, contactorsNo. 5 and No. 10 are picked up, each cutting out a portion of
Text Appearing After Image:
414 STREET RAILWAY JOURNAL. (Vol. XXL No. ii. the resistance. The remaining resistance contactors pick upuntil all of the resistance is cut out, and the full series positionis reached. The connections on the first parallel notch are suchthat the current for No. i motor passes through contactor No.7 and No. 6, and through resistance R-i to 8. The current forNo. 2 motor in parallel working passes through contactors No.No. 8 and No. 9 and resistances R-7 to R-12. It will be seen from this statement that the connections differfrom those of the former type M control in two important par-ticulars. First, the resistances are divided into two groups,and each group is always used with the same motor and onlyfor that motor. The other point of difference lies in the factthat each resistance contactor short-circuits one section of theresistance only instead of controlling in some cases more than wheel hubs. It is fitted with the nose suspension and its frontside is supported by lugs cast on a fra

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Volume
InfoField
1903
Flickr tags
InfoField
  • bookid:streetrailwayjo211903newy
  • bookyear:1884
  • bookdecade:1880
  • bookcentury:1800
  • booksubject:Street_railroads
  • booksubject:Electric_railroads
  • booksubject:Transportation
  • bookpublisher:New_York___McGraw_Pub__Co_
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Smithsonian_Libraries
  • bookleafnumber:432
  • bookcollection:smithsonian
Flickr posted date
InfoField
27 July 2014
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