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. 1893 Excerpt: ... of the district to be lit. Experience shows, however, that the economical limits of such a system are reached when the mean length of the feeders is some 300 or 400 yards. By the three-wire system, as developed by Mr. Edison and Dr. Hopkinson, the system of low-pressure supply can be economically conducted when the ...
Read More
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. 1893 Excerpt: ... of the district to be lit. Experience shows, however, that the economical limits of such a system are reached when the mean length of the feeders is some 300 or 400 yards. By the three-wire system, as developed by Mr. Edison and Dr. Hopkinson, the system of low-pressure supply can be economically conducted when the mean length of the feeders is from half to three-quarters of a mile. The five-wire system is applicable up to a mean distance of one mile. Beyond this distance, we are practically limited to a system of supply 6ased upon alternating currents and transformers. Assuming, then, that the case to be dealt with is one in which the above facts point to the employment of the alternating current system, z the first consideration to which the engineer has to address himself is the selection of a suitable site for the station. It will generally be found that the choice is limited to two or three positions, and that questions of convenience, price of land, access, nuisance, and other circumstances bind down the engineer to the selection of one out of a small choice of possible sites. Assuming, however, that an option exists between one or more positions for such an "eccentric station," then the following considerations should have due weight in determining the exact choice to be made. In the first place, the selection ought to be governed by the consideration of convenience of access for coal and of freedom from creating nuisance by smoke, steam, or vibration. At the outset, when the supply from such station is small, the amount of coal and other stores to be brought into it, and of ashes, &c, to be removed, will not present formidable difficulties, but as the station grows in magnitude this will prove to be one of the most serious items in th...
Read Less
Add this copy of The Alternate Current Transformer in Theory and to cart. $73.43, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2011 by Nabu Press.
