Electric Train Lighting Handbook for Railway Electrical Engineers

Electric Train Lighting Handbook for Railway Electrical Engineers

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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. 1910 edition. Excerpt: ...charge. This should be recorded on the outside of the pilot cell. This specific gravity reading is called the maximum gravity and is used as a standard for judging the state of the charge and discharge of the cells. Upon the arrival of the car in the yards, the specific gravity reading of the pilot cell, together with the temperature of the electrolyte, should be taken and properly recorded. The specific gravity reading should be corrected to 70 F. This reading compared with the maximum gravity and with previous readings will give the condition of the battery, and the same can be taken care of according to the conditions of the service. If the battery is used in connection with the axle or head-end systems, the pilot cell reading will show whether the battery needs an extra charge at the terminal, and it will also show whether the regulator on the machine is set properly. Before the car leaves the terminal, a second pilot cell reading can be taken, serving as a check on the amount of charge given the battery. This.reading should also be recorded. Voltage Operation: In addition to the specific gravity of the pilot cell, the terminal voltage of the battery should be taken with all the lights switched on, and after the lights have been burning for at least five minutes. The voltage reading serves as a check on the gravity reading. If the voltage reading is lower than should be expected from the gravity reading, the voltage should be taken of each individual cell in order to detect low cells. If any low cells are found, the cause of the trouble should be investigated and remedied immediately. In operating the battery, the voltage alone should preferably not be used as a guide, as it will vary with the temperature, the age of the battery, and...show more

Product details

  • Paperback | 56 pages
  • 189 x 246 x 3mm | 118g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236741382
  • 9781236741387