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. 1917 Excerpt: ...is due primarily to a better understanding of the chemical and physical questions involved." Table 24.--Specifications For A Number Of ...Read MoreThis 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. 1917 Excerpt: ...is due primarily to a better understanding of the chemical and physical questions involved." Table 24.--Specifications For A Number Of Different Sizes And Types Of SusPension Insulators (locke Insulator Mfq. Co.) The arc-over voltages given above are for insulators without horns. Wet arc-over voltages are given for vertical strings. For horizontal, or strain, position the voltages are approximately 10 per cent. less. "Unfortunately, glass manufacturers in the United States have failed to realize adequately the availability of their product for high tension work. In the first place, for the new and unusual shapes required, they at first demanded prices that, if not prohibitive, plainly suggested large profits. Secondly, the manufacturers failed to consider sufficiently the electrical side of the problem and did not show a progressive spirit in arranging testing plants and methods of test and experiment. Furthermore, such concerns as have developed improved methods of manufacture, have failed to publish the results of their improvements so that to many engineers, the merits and relative economy of glass as compared with other materials, have never been made apparent. For these reasons chiefly, porcelain has Fig. 112b.--Suspension Insulators for 80,000 to 110,000 Volts (R. Thomas and Sons Company) The insulator shown at the left for 80,000 volts has been used on the systems of the Alabama Power Company and the Carolina Light and Power Company. The insulator shown at the right for 110,000 volts has been used on lines of the Southern Power Company and those of the Georgia Railway and Power Company. achieved a position in this field which modern glass insulators are now in a position to dispute. "In the same way that the different problems of a hig...Read Less
All Editions of American Hydroelectric Practice; A Compilation of Useful Data and Information on the Design, Construction and Operation of Hydroelectric Systems, from the Penstocks to Distribution Lines
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited, Baker & Taylor, Inc., or by their respective licensors, or by the publishers, or by their respective licensors. For personal use only. All rights reserved. All rights in images of books or other publications are reserved by the original copyright holders.