Handbook of Electrical Methods
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Handbook of Electrical Methods

Handbook of Electrical Methods


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About the Book

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...when the lights were extinguished the bell was connected. Of course, the lamp and bell circuits are entirely independent and insulated from each other. The arrangement has proved an entire success so far as the automatic disconnection of the bell is concerned. Economical Street-lighting Wiring Arrangement.--The Worcester (Mass.) Electric Light Company installed a number of trial circuits of 4-amp., 75-watt tungsten series incandescent lamps early in 1912 in connection with the illumination of outlying districts. To economize in the feeder investment for this work, Fred H. Smith, superintendent of the company, devised a plan by which energy for the operation of each circuit is derived from the regular 2300-volt, single-phase commercial service of the plant. Each circuit of incandescent lamps contains from fifty to seventy-five lamps looped through a suburban zone from a constant-current transformer located in a pole box in the immediate neighborhood of the lamp district. The constant-current transformer is connected across the 2300-volt line, one side being fused and the other side connected through a solenoid switch, the actuating coil of which is in series with one of the company's regular street arc circuits passing the transformer case. SolenoM Switch Tranatormer FIG. 1. ECONOMICAL STREET-LIGHTING WIRING ARRANGEMENT. The incandescent service is thrown on automatically at the time the regular arc service is switched into operation. The plugging in of the arc lamps permits current to pass through the solenoid switch coil in the pole box, thereby closing the contacts of the local constant-current transformer primary and starting the operation of the series incandescent lamps. In order to keep the incandescent circuit constantly in service...


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Product Details
  • ISBN-13: 9781235872839
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 88
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1235872831
  • Publisher Date: 01 Oct 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 172 gr


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