. The Street railway journal . ator, while facing the bench board and the instru-ments, to look out over the floor of the sub-station withoutturning his head. The switches of the direct-current circuitsare hand operated and are located upon boards at the right andleft of the control board. A novel and important feature introduced (it is believed forthe first time) in these sub-stations is the location in separatebrick compartments of the automatic circuit breakers in thedirect-current feeder circuits. These circuit-breaker compart-ments are shown in the lower photograph on page 630, and arein
. The Street railway journal . ator, while facing the bench board and the instru-ments, to look out over the floor of the sub-station withoutturning his head. The switches of the direct-current circuitsare hand operated and are located upon boards at the right andleft of the control board. A novel and important feature introduced (it is believed forthe first time) in these sub-stations is the location in separatebrick compartments of the automatic circuit breakers in thedirect-current feeder circuits. These circuit-breaker compart-ments are shown in the lower photograph on page 630, and arein a line facing the boards which carry the direct feederswitches, each circuit breaker being located in a compartmentdirectly opposite the panel which carries the switch belongingto the corresponding circuit. This plan will effectually preventdamage to other parts of the switchboard equipment when cir-cuit breakers open automatically under conditions of short-cir-cuit. It also tends to eliminate risk to the operator, and, there-. fore, to increase his confidence and accuracy in manipulatingthe hand-operated switches. The three conductor cables which convey tri-phase currentsfrom the power house are carried through tile ducts from themanholes located in the street directly in front of each sub-station to the back of the station where the end of the cable isconnected directly beneath its oil switch. The three con-ductors, now well separated, extend vertically to the fixed ter-
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
