File:Journal of electricity (1920) (14576978750).jpg

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English:

Identifier: journalofele451151920sanf (find matches)
Title: Journal of electricity
Year: 1917 (1910s)
Authors:
Subjects: Electrical engineering Electricity Gas manufacture and works
Publisher: San Francisco : Technical Pub. Co.
Contributing Library: San Francisco Public Library
Digitizing Sponsor: California State Library Califa/LSTA Grant

View Book Page: Book Viewer
About This Book: Catalog Entry
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Transformer end of car showing arrangement of louvers to assist rapid cooling. companys 60,000-volt to 2300-volt transformerswhich are located on a concrete platform which withthe pole-top switches and fuses are located inside ofa high wire fence for protection against trespassers. Since the substation is automatic, normally thedoors are always closed and locked, and in order toprovide ventilation louvers were let into both sidesand ends of the car; in addition scieened openingsare installed in the floor of the car for further ven-tilation. Method of Operation On account of the comparative newness of thistype of equipment on the coast, a short description ofthe sequence of operations which takes place in auto-matically starting up and shutting down is givenhere. August 1, 1920) JOURNAL OF ELECTRICITY 133
Text Appearing After Image:
O E-i oa o s IS 134 JOURNAL OF ELECTRICITY (Vol. 45—No. 3 Starting of Station — With the station shut down, and a train coming into thesubstation zone on either side, the third rail voltage is grad-ually lowered until it reaches the value at which the relays inthe automatic substation are set which govern starting. Relay 1 is a contact making voltm-eter which is adjust-able for any particular trolley voltage desired, in this case500 volts. In connection with the overload relay .37, whichfunctions to shut down the station, these two relays are theprimary control in starting and stopping the station. Relay one closes instantaneously when the voltage dropsto 500 volts, short circuiting the coil of relay 2 which is atime-limit circuit-opening relay whose function is to providea time delay in starting up the equipment as the low voltageconditions appear, as obviously simply a momentai-y swingbelow 500 volts should not be pei-mitted to start up thestation; the time setting of relay 2 ca

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https://www.flickr.com/photos/internetarchivebookimages/14576978750/

Author Internet Archive Book Images
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
1920
Flickr tags
InfoField
  • bookid:journalofele451151920sanf
  • bookyear:1917
  • bookdecade:1910
  • bookcentury:1900
  • booksubject:Electrical_engineering
  • booksubject:Electricity
  • booksubject:Gas_manufacture_and_works
  • bookpublisher:San_Francisco___Technical_Pub__Co_
  • bookcontributor:San_Francisco_Public_Library
  • booksponsor:California_State_Library_Califa_LSTA_Grant
  • bookleafnumber:150
  • bookcollection:americana
Flickr posted date
InfoField
28 July 2014



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