File:Electric railway journal (1917) (14574956789).jpg

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English:

Identifier: electricrailway501917newy (find matches)
Title: Electric railway journal
Year: 1908 (1900s)
Authors:
Subjects: Electric railroads
Publisher: (New York) McGraw Hill Pub. Co
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Text Appearing Before Image:
OMAHA THREE-WIRE SYSTEM—FIG. 3—INSULATING SECTIONIN TROLLEY BETWEEN POSITIVE AND NEGATIVEOVERHEAD DISTRICTS tive and negative trolley sections. Two section breakerswere used with 6 ft. of trolley between them, as shownin the sketch (Fig. 3). ■ ■„ s. Disadvantages of Three-Wire System In the operation of cars no objection has presenteditself on this system on account of the reversal ofpolarity on a number of trolley sections. The motor-men throw off their power and drift across the deadsections of trolley. No auxiliary equipment such ascoasting recorders, wattmeters, arc headlights, etc.,are in use. Coasting recorders and wattmeters, how-ever, would not be affected in any way. Arc headlightsto operate properly should be provided with a double-pole double-throw switch for reversing when runningon negative sections. Ampere-hour meters would runbackward when the cars were on negative sections.
Text Appearing After Image:
OMAHA THREE-WIRE SYSTEM—FIG. 4—MAP OF OMAHA SHOW-ING NEGATIVE TROLLEY SECTIONS AND OVER-ALLTRACK POTENTIALS 852 ELECTRIC RAILWAY JOURNAL (Vol. 50, No. 19 Multiple-unit control would operate satisfactorilywhere only one trolley is used; where more than onetrolley is used it would be necessary to provide anexceptionally long break between positive and negativetrolley sections, which would be a very objectionablearrangement. The objection to the three-wire system from a sub-station operating standpoint is the resultant lowering Table I—Over-all Track Potential Measurement Referred toRail at Lake Street Substation—Reading Station No. 34 Before AfterThree-Wire Three-WireReading System Was System Was Station Installed, Installed, Number Location Volts Volts 20 Thirty-third and Cuming 10.4 2.5 ?1 Twenty-fifth Avenue and Cuming.. 9.6 2.622 Seventeenth and Burt 8.2 0.7 25 Fiftieth and Underwood 14.5 1.4 26 Benson Avenue 14.3 0.8 . 38 Twenty-fourth and Ames Avenue.. 9.8 1.7 39 Forty-sec

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https://www.flickr.com/photos/internetarchivebookimages/14574956789/

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Volume
InfoField
1917
Flickr tags
InfoField
  • bookid:electricrailway501917newy
  • bookyear:1908
  • bookdecade:1900
  • bookcentury:1900
  • booksubject:Electric_railroads
  • bookpublisher:_New_York__McGraw_Hill_Pub__Co
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Smithsonian_Libraries
  • bookleafnumber:875
  • bookcollection:smithsonian
Flickr posted date
InfoField
27 July 2014

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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14574956789. It was reviewed on 14 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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current14:16, 14 September 2015Thumbnail for version as of 14:16, 14 September 20151,188 × 1,408 (180 KB) (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Identifier''': electricrailway501917newy ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Felectricrail...

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