General Electric Review Volume 17

General Electric Review Volume 17

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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. 1914 edition. Excerpt: ...torque of the driven device affects the speed but little. The converse is true, however, in the lower speed ranges so T. A. Worcester METHOD OF DETECTING FAULTS IN TRANSMISSION INSULATORS By T. A. Worcester Power And Mining Engineering Department, General Electric Company The author brings attention to the seriousness of suspension insulator failures which have occurred during the past few years and to the efforts of operating engineers to locate the causes of these troubles and to relieve their transmission lines from the disastrous effects of frequent failures. Studies were made of various possible methods of detecting weak insulators installed on the line before they actually failed by puncture, but most of these methods were found to be unsuitable because of the bulk, weight and cost of the testing equipment. One company adopted a portable megger for this work, and the results of its investigation are given by the author. Other tests made on punctured insulators with a megger are described and the advantages and disadvantages of this class of instrument are discussed. It is pointed out that such an instrument is not suitable for picking out all damaged, punctured or cracked insulators, but that its usefulness is limited to detecting only those in which the surface of the fracture is conducting.--Editor. and in general were not adapted to testing insulators on the line. The engineers of one company after careful consideration of other testing equipments turned their attention to the megger which is a megohm meter or a direct reading instrument for measuring high resistances. This type of instrument attracted attention because it is comparatively light and substantial, can be easily carried along a transmission line, and can be readily...show more

Product details

  • Paperback | 626 pages
  • 189 x 246 x 32mm | 1,102g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236776992
  • 9781236776990