. Electric railway journal . lso operated,principally for the purpose of transporting a local brown coal. The great success of the Cologne-Bonn line, especiallyin attracting tourist travel, led to the completion in Septem-ber, 1911, of a second electric railway which runs fromBonn to terminals at Siegburg and Konigswinter. The while the terminal divisions are fed from batteries at Hersel and Siirth, both ofthese places being located miles from opposite sides ofthe generating plant. The main station equipment consistsof one 520-kw and two 350-kw generators; two
. Electric railway journal . lso operated,principally for the purpose of transporting a local brown coal. The great success of the Cologne-Bonn line, especiallyin attracting tourist travel, led to the completion in Septem-ber, 1911, of a second electric railway which runs fromBonn to terminals at Siegburg and Konigswinter. The while the terminal divisions are fed from batteries at Hersel and Siirth, both ofthese places being located miles from opposite sides ofthe generating plant. The main station equipment consistsof one 520-kw and two 350-kw generators; two 12-kw,1000/150-volt booster sets (one spare), which are con-nected to the outside battery stations over separate cir-cuits, a 55/76-hp Pirani set (for the original battery capac-ity of 330 amp-hr.), now used for lighting, and a 120/195-hp Pirani set for the batteries. The battery houses requireno permanent attendance because bell alarm signals areinstalled to notify the power plant men when the cellsrequire electrolyte, Rhine Interurban Railways—Four-Car Train of Bonn-Siegburg-Konigswinter Line Crossing Bridge on a per Cent Grade territory of both systems and the principal places servedby them are shown in the accompanying map. The tworoads have no physical connection, but their schedules arearranged to harmonize as closely as possible. Each line isequipped with Siemens-Schuckert station line and car ap-paratus for service at 1000 volts and 500-550 volts accord-ing to conditions. The latter installation, however, differsfrom the former in some particulars owing to the advance-ment of the art. THE COLOGNE-BONN RAILWAY When the Cologne-Bonn railway was projected 1000 voltsdirect-current was chosen in preference to higher-voltagesingle-phase equipment owing to the condition that it wasnecessary to operate on the standard voltage circuitsof the Cologne and Bonn street railways. To minimize linelosses, the power station was placed at Wesseling, the ap-proximate cent
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