. The street railway review . 105 cars. The cards are placed at the right of the door, over the end window. » The Metropolitan Street Railway Company, of KansasCitv, Mo., gets its transfers in large numbers. Recently accinsignment of 10,000,000 was received from a Philadel-phia printing firm. ^tlM%il3kV^S\gVlC\V* 227 SOME EXPEDIENTS IN POWER STATIONPRACTICE. BY J. H. DE GRUCHY. In power station practice it is expedient, to get the great-est efficiency, to run the generating units at as nearly fullload as possible. With the machine fuses of sufficient car-rying capacity to take care of temporar
. The street railway review . 105 cars. The cards are placed at the right of the door, over the end window. » The Metropolitan Street Railway Company, of KansasCitv, Mo., gets its transfers in large numbers. Recently accinsignment of 10,000,000 was received from a Philadel-phia printing firm. ^tlM%il3kV^S\gVlC\V* 227 SOME EXPEDIENTS IN POWER STATIONPRACTICE. BY J. H. DE GRUCHY. In power station practice it is expedient, to get the great-est efficiency, to run the generating units at as nearly fullload as possible. With the machine fuses of sufficient car-rying capacity to take care of temporary overloads, onemust necessarily depend for protection upon the feedercircuit-breaker on the line upon which the trouble if, as sometimes happens, short-circuits occur on twoor more feeders at one time, the machine circuit-breakersare liable to be opened by the excessive overload put uponthem. Short-circuits are caused by broken trolley or feed wires,by trouble in the car equipments, and by foreign wires. : DEVICE FOR ADJUSTING THE LEAD. crossing the trolley wires and rails. These are the causesof short-circuits, which generally come singly. Short-circuits produced by lightning, cither from directdischarges or those dissipated over a larger area and gen-erally due to induction, are liable to occur on two or morefeeders at one time. Sometimes they are accompanied bya discharge through the machine lightning arresters. Such occurences sometimes happen during severe thun-der storms. If the machine circuit-breakers are in properworking condition they will open the main circuit. Nowsuppose we have four dynamos running with a capacity of4,000 amperes at 560 volts pressure. With the feedercircuit-breaker adjusted to open at 1,000 amperes, short-circuits on two of them, together with a flow of currentto the ground through one of the machine lightning ar-resters, would undoubtedly open the machine circuit-break-ers. With a heavy short-circuit, the current flowing duringa rupt
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
