. The Street railway journal . HIGH-TENSION SECTIONALIZING SWITCH IN SERVICE accompanying illustration shows the switch installed at thesub-station at Roanoke, a few miles southwest of FortWayne, Ind. Four poles support heavy cross-arms at thetop, and below these is bolted the framework carrying theswitch proper. The high-tension wires of one side of the line are lead overtop cross-arms and down to three fixed brass bell-mouths,supported on line insulators. The wires of the other side ofthe line terminate in three brass rods, mounted on insulators,which are themselves carried on a wood frame.
. The Street railway journal . HIGH-TENSION SECTIONALIZING SWITCH IN SERVICE accompanying illustration shows the switch installed at thesub-station at Roanoke, a few miles southwest of FortWayne, Ind. Four poles support heavy cross-arms at thetop, and below these is bolted the framework carrying theswitch proper. The high-tension wires of one side of the line are lead overtop cross-arms and down to three fixed brass bell-mouths,supported on line insulators. The wires of the other side ofthe line terminate in three brass rods, mounted on insulators,which are themselves carried on a wood frame. This frameis supported on four long arms, pivoted at their lower endsso that the frame may be thrown backward or thrown forward the terminal of the brass rods enterthe fixed bell-mouths and the circuit is closed. Throwingthe frame to the rear causes the rods to recede a foot ormore from the bell-mouth and the circuit is opened. When a 13,500-volt circuit is broken, the length of each. CONSTRUCTION DETAILS OF HIGH-TENSION SECTIONAL-IZING SWITCH of the three arcs is not more than 6 ins. The small arc islargely due to the fact that the inertia of the rotary con-verter on one side of the line keeps the voltage up approxi-mately to that of the generating machine during the periodthat the circuit is being broken. The switch is primarily a line-sectionalizing switch and isnot intended to take the place of oil switches in powerhouses or sub-stations. One point where it can be used toadvantage is at a junction where two or more high-tensionlines diverge after having been carried on one pole line forseveral miles. When trouble occurs on one of the lines be-yond the junction, it is frequently necessary to cut the cur-rent off at the power house from all of the paralleling linesbefore repairs can be made, because of the fact that inductiveeffects in the paralleling lines may result in a dangerouslyhigh potential in the one-line cut-out. Open air switches ofthe type described w
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
