. Electric railway review . 07, page 188) the value of i)roperly designedfeeding and return systems was discussed. Such systems, , include not only the trolley wire, rails, rail bonds andother returns, but any supplementary trolley feeders that maybe required for maintaining an even potential on the trolleywire under the varying conditions of traffic. After the bond question has been settled by choosing atype with sufficient carrying capacity so that the loss over thejoints shall not exceed, for any given time, the interest coston the outlay for purchasing and installing the bonds, th
. Electric railway review . 07, page 188) the value of i)roperly designedfeeding and return systems was discussed. Such systems, , include not only the trolley wire, rails, rail bonds andother returns, but any supplementary trolley feeders that maybe required for maintaining an even potential on the trolleywire under the varying conditions of traffic. After the bond question has been settled by choosing atype with sufficient carrying capacity so that the loss over thejoints shall not exceed, for any given time, the interest coston the outlay for purchasing and installing the bonds, therecan next be determined the resistance of the completed track. To complete the study of traffic conditions and thus beable to intelligently discuss the subject of the proper sizesfor trolley and feeders will require the construction of atrain sheet showing the location of the cars during all hoursof the day. From this information and the characteristicsof the motors and cars which will be operated over the road, jj»j>. Plot Showing Electrical Quantities for Feeder Layout, curves can be plotted to show the power required on thevarious portions of the line and during all parts of the curves are useful for determining the cost of powerwasted or spent in overcoming the resistance of the feedersand returns. The location of the cars during the hours ofheaviest traffic will probably determine the size of the feeders,although it is necessary to consider to some extent theoperating conditions during the hours of lighter traflic. In the earlier days of electric railway construction thefeeder systems of new roads were copied almost entirelyfrom those of older roads operated under similar on a more careful study was made and the averagepower required per car was determined, to be used in feedercalculations. Such calculations, however, were very crude,since each car was assumed to be in operation all the timeand utilizing the average current as already determ
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
