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The Elements of Electrical Engineering; Direct Current Machines Electric Distribution and Lighting. 3D Ed

The Elements of Electrical Engineering; Direct Current Machines Electric Distribution and Lighting. 3D Ed


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...Street Railway Journal for Sept. 21, 1901, " The Application of Storage Batteries to the System of the Brooklyn Heights Railroad Company.' Amperee a mean value of 150 amperes. The boiler, engine and generator are designed to deliver a little more than the mean station load of 75 kilowatts, and the variations of load are equalized by a storage battery which has to deliver a maximum current of 250 amperes (= 400 amperes--150 amperes) on discharge, and absorb the entire generator output of 150 amperes when the station load is zero. On account of the greater values of current on discharge than on charge, the maximum duty of the booster is lessened by choosing the number of storage cells so as to have the mean voltage of the battery greater than the station voltage. The storage battery in fact consists of 234 cells, which require a maximum charging electromotive force of about 562 volts (2.4 volts per cell), and the battery is never discharged below 445 volts (1.9 volts per cell). The duty required of the booster varies between wide limits. The heaviest duty required for charging the battery comes when the battery is at nearly full charge and the demand for current zero; then the booster must develop 62 volts with 150 amperes of current flowing through its armature. The heaviest duty required for discharging the battery comes when the battery is nearly discharged and the demand for current a maximum; then the booster must develop 55 volts with 250 amperes in its armature. The booster would therefore be rated, say, as a 55-volt 250-ampere generator, inasmuch as the voltage of such a machine could be easily pushed up to 62 volts with an armature current of only 150 amperes. This booster differs from an ordinary generator in having a very large space provided ...


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Product Details
  • ISBN-13: 9781236395566
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 142
  • Spine Width: 8 mm
  • Width: 189 mm
  • ISBN-10: 1236395565
  • Publisher Date: 21 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 268 gr


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