. The Street railway journal . feeder switches can alsohe operated by a hand control switch, as well as auto-matically by overload. Other features of the power-houseswitchboards are made plain by the wiring diagram. Therearc three 1500-kw three-phase General Electric generators ator panels, and will act to open the oil switch in the in-coming feeder in case the sub-station attempts to give cur-rent to the line instead of receiving it. This might happenat any of the sub-stations on a loop circuit in case of ashort circuit on the high-tension lines between the powerhouse and the sub-station. The
. The Street railway journal . feeder switches can alsohe operated by a hand control switch, as well as auto-matically by overload. Other features of the power-houseswitchboards are made plain by the wiring diagram. Therearc three 1500-kw three-phase General Electric generators ator panels, and will act to open the oil switch in the in-coming feeder in case the sub-station attempts to give cur-rent to the line instead of receiving it. This might happenat any of the sub-stations on a loop circuit in case of ashort circuit on the high-tension lines between the powerhouse and the sub-station. The sub-station would then re-ceive current from the other direction, and feed back intothe short circuit. In case U were desired as a regular thingto feed back from the sub-station because of some sectionof the high-tension lines being cut out, it would be doneby adjusting the reversal relay to allow this. After pass-ing the current transformers, the incoming line is takento the three-pole oil machine switch. The switch is con-. LONG CUT ON THE AURORA, ELGIN & CHICAGO RAILWAY now installed. The 26,000-volt wiring in both power sta-tion and sub-stations is carried in brick hues or conduits,which isolates each circuit from adjacent circuits. Theregular sub-station equipment for all the sub-stations com-prises two 500-kw rctary converters with a bank of trans-formers for each. The sub-stations have basements whichare air-tight, and in which air is kept under pressure by theblower for cooling the transformer. Referring to the accompanying wiring diagram of a sub-station it is seen that one panel of the switchboard is de-voted to the incoming 26,000-volt line. Where there is oneor more suli-stations beyond this one there is another paneldevoted to the outgoing line to the next sub-station. Theprincipal object of this is to make it possible to cut off theline beyond in case of short circuit. After passing thelightning arresters the incoming line goes throug;h currenttransformers which
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
